Wednesday, April 2, 2025

UDLCO CRH: Time to pull our act together around fetal sex determination in India?

Summary:

Problem statement: Globally fetal gender determination is easily done using maternal blood cell-free fetal DNA (CfDNA) that provides near 100% specificity and sensitivity for fetal y chromosome. Yet in India ultrasound centers and doctors are regularly made to work extra to comply with the PCPNDT act initially formulated in 1994 to prevent female foeticide.
The conversational transcripts discuss the legal and ethical implications of revealing a fetus's gender in India, particularly in the context of the Pre-Conception and Pre-Natal Diagnostic Techniques (PCPNDT) Act and questions it's current relevance in the presence of molecular biology techniques that can easily outperform ultrasound for fetal sex determination technique s. The conversation highlights the tension between the law's intention to prevent female feticide and the reality of subtle gender revelation practices. Participants also discuss the role of technology, such as chromosomal analysis of maternal blood, in gender determination and the potential consequences of revealing gender information. 

*Key Words:*

- PCPNDT Act
- Gender determination
- Female feticide
- Chromosomal analysis
- Maternal blood test
- Sex selection
CRH Critical realist heutagogy 

Conversational Transcripts:

[02/04, 15:29]hu1: Also, is it legal to reveal the gender in India even if the gender identification is done overseas?


[02/04, 17:24]hu2: The question is intriguing. Radio diagnosis cannot report the gender (and that restricts what innovations we can bring in)

However, IVF facilities are allowed to - maybe even expected to carry out Preimplantation Genetic Testing (PGT). Does any law prevent them from revealing the foetus's gender?

There are centers (at least one in LA) that claim gender selection as their expertise!

Maybe their laws are different, but isn't selection different from disclosure?


[02/04, 17:26]hu3: Scientific evolution can't be restricted...law around it needs flexibility to assure greater good


[02/04, 17:27]hu3: Genetically edited baby is not far from reality

[02/04, 18:52]hu4: The regulation of not revealing the gender is more on paper than real like several other laws in India. The fact is this is done in a very subtle manner using terminologies like "Jai Shri Ram" or "Jai Mata ji".  The sole purpose of the legislation was to prevent abortions of female foetuses. On the other hand are more social / ethical issues (pregnancy after two healthy children of the same gender?), so should population control be more important? or should parents unwilling to have a child of the same gender be forced to a pregnancy to full term when the mother has the full right to abort the baby upto 20 weeks?

[03/04, 05:22]hu5: What is an open secret is that. Using US to detect the fetal gender is no longer required. A simple Chromosomal analysis of maternal blood is enough. Positive for _y chromosome_ in 8 weeks if male


[03/04, 05:24]hu5: The reason why this act is continuing as it is good earning for the regulators. We are all appealing the reverse, announce the gender to the government for every case - and let the parents explain why they aborted


[03/04, 06:28]hu6: Yes with a high sensitivity and specificity too!👏👏



Background to the PCPNDT act toward closing access to sex determination to prevent feticide in India and China:



Background to global open access policies around sex determination:


Thematic Analysis:*

- *Coding:*
    1. Legal and ethical implications
    2. Gender determination and revelation
    3. Female feticide and sex selection
    4. Role of technology in gender determination
    5. Consequences of revealing gender information
- *Categorization:*
    1. *Legal and Ethical Frameworks:* The conversation highlights the complexities of the PCPNDT Act and its implementation.
    2. *Gender Determination and Revelation:* Participants discuss the various methods of gender determination, including chromosomal analysis of maternal blood.
    3. *Female Feticide and Sex Selection:* The conversation touches on the issue of female feticide and the role of sex selection in Indian society.
- *Learning Points:*

    1. The PCPNDT Act aims to prevent female feticide, but its implementation is complex and often subtly circumvented.
    2. Technology, such as chromosomal analysis of maternal blood, has made gender determination more accessible and accurate.
    3. Revealing gender information can have significant consequences, including the potential for sex selection and female feticide.
    4. The conversation highlights the need for a nuanced understanding of the legal, ethical, and social implications of gender determination and revelation in India.




Epilogue:

[03/04, 06:55]hu2: Health IT can play a moderator's role.


Device output can be block chained by mandatory law - and it doesn't cost much


There can be a well defined review panel, which can reveal the gender to courts in a sealed cover.


If leave is granted, mandatory social worker engagement may be enforced and MTP allowed on a case by case basis.


Challenges:


1. The review results may arrive by the time the unborn's grandkids are grown ups


2. Aftermarket modification of block chained modalities may become big business 


3. The review panel may not have enough of an incentive left, after the payables are deducted from the receivables 


My opinion - our laws may be archaic, but the problem lies elsewhere (not in the Parliament)


[03/04, 07:19]cm: Even the device output for maternal blood cell-free fetal DNA (CfDNA) to detect fetal y chromosome with 100% sensitivity and specificity? Do we have an estimate of how many such devices exists?

Monday, March 31, 2025

UDLCO CRH: Soulful journal club on oral semaglutide vs placebo!

Summary: Current Medical education systems that are far from globally average in many parts of the world work on promoting rote memorization and hardly ever promote critical thinking as a result of which most students once they enter the industry fall prey to simplistic big pharma influences that use relative values driven and interpreted RCT data!


The discussion on this journal club formed organically and randomly out of a group of physicians excited about the launch of a new drug hits a climax when a user points out a particular side effect that is pivoted on to explain in terms of absolute values why taking the drug is akin to trading off and bearing some distaste in the tongue (side effect), just so that they can become one with the group of (4825-191=4634) higher number of people (taking the drug oral semaglutide) that could avoid a nonfatal myocardial infarction as opposed to the lesser (4825-253=4572) number in the 
placebo group who still had the joy of taste but then 62 more of their placebo brethren developed a non fatal myocardial infarction compared to those on oral semaglutide! 

If that is interpreted as a primeval herd instinct to find safety in numbers and if we can imagine the two groups of 4825 people as wildebeests wading to cross a crocodile filled African river of metabolic syn then can we really spot the difference of 191 vs 253 missing in each group when the wildebeest cross over to the other side?

While the above provides an apparently polarised anti big pharma biased viewpoint, the same day this author discovered a new AI LLM tool from a Stanford lab called med pharma and unboxing it here: 
https://medicinedepartment.blogspot.com/2025/03/unboxing-med-arena-for-first-time.html?m=1, offered a more balanced perspective where while the LLM appreciated the absolute number world view, it hinted that we need to remember that the paper also reports relative risks (hazard ratios), which are essential for understanding proportional reductions in risk. Both perspectives are valuable.


Key words:

Big pharma Journal club influencers

Proportional risk reduction 

CRH Critical realist heutagogy 



Journal club collective conversational Transcripts:

[29/03, 19:46]wa user 1: Have a few paid links for live SOUL relay at about 1.15 am tonight.  Anyone interested pls DM me

[29/03, 19:52]wa user 2: Morning heading news plz
Breaking news

[29/03, 19:56]WA user 3 : What?
[29/03, 19:57]: Ok SOUL


[29/03, 20:08]WA user 4: 1:00 am. I have free link 😂


[29/03, 20:22]: Any last minutes guess on expected results of SOUL? Closest guess maker will get prize 🏆 from me 😊


[29/03, 20:22]u2: MI
[29/03, 20:22]: Outcome

[29/03, 20:22] group moderator gm: I hope ,you know it now

[29/03, 20:23]u2: I'm sure AK knows

[29/03, 20:24]u4: Oreyy Dada…bhogwan 😨

[29/03, 20:24]u2: I guess 14%reduction in MACE  and stroke due to sema 

or is that old news

[29/03, 20:26]u4: Your AI 🤖 didn’t work here 😂😂

[29/03, 20:28]u2: I know. It can't find out what is not leaked on the net

[29/03, 20:28]u4: If oral sema reduces MI significantly - would you prefer it over SGLT2i ?

[29/03, 20:30]gm: No

[29/03, 20:30]u4: Why not ? Due to cost ?


[29/03, 20:31]gm: Cost and tolerance issues
More confidence with SGLT2I


[29/03, 20:31] u3: In certain situations
1. If MI is the prominent risk and not HF
2. If eGFR is less than 30
3. If weight is a major concern sema I would prefer

[29/03, 20:32]u2: I prefer 

Need close look of the study

[29/03, 20:32]u4: STRIDE trial of injectable Semaglutide in PAD is being live presented at ACC now


[29/03, 20:34]u3: I guess what you are trying to say u4 is the data being presented today may reestablish sema to be a superior cardiac and cv drug over SGLT2i.


I was fortunate to attend your brilliant comparison of dapa and empa in MAHARSSDI 2025 here in Mumbai


[29/03, 20:34]u4: Did any drug reduce MI in past? If it is true it would add great value to the money with oral sema beside best Hba1C and body weight reduction amongst all anti diabetes drugs!


[29/03, 20:39]u2: Yup
[29/03, 20:39]u3: Understood where this argument is going. 

I guess at 1.20 am history is going to be created with sema

[29/03, 20:39] u4: 1.15am

[29/03, 20:40]u3: Waiting for the prize from u4🫶🫶🫶

[29/03, 20:41]u3: Just as Dapa is now a mandatory arsenal in the therapeutic armamentarium of cardiologists i guess after 1.15 am Sema will be a mandatory prescription for most cardiologists dealing with MI

[29/03, 20:41]u2: Sir me too
🙏🙏





[30/03, 08:25] u6: My humble observations:
1) Happy that MI was reduced
2) Surprised to see stroke wasn`t reduced
3) Limb events – upto 2 years no benefit – actually at one point it was worse than placebo - then all of a sudden the line diverges
4) A1C > 8 far better than < 8 (but p value for interaction not given) – so again the question arises – was better glycaemic control partially responsible for the benefits? Of course just glycaemic control on its own does not matter but still

In summary, my humble thoughts

_*Great for Sema*_
MI reduction for the first time
Limb events reduction for the first time
Better in Asians (however no p value for interaction given)

*Not so great*
No reduction in stroke
No reduction in CKD
No reduction in HF
Less than 3 kg weight loss


[30/03, 08:33]gm: Thank you 🙏

[30/03, 08:33] u6: The distribution of participants who were receiving the 3-mg, 7-mg, and 14-mg doses of oral semaglutide over time is summarized in Figure S3A (but I don`t have access to it)
27% discontinued the drug so would have been interesting to know the trial product estimand


[30/03, 08:36]u1: 1. What are the anti diabetics used alongside Sema?
2. Do statin and aspirin continued as per present guidelines?

[30/03, 08:39]u6: I don`t know the exact figures but as it was a double blind randomised control trial it is expected that both groups would have equal distribution of statin and aspirin

[30/03, 08:48]u3: Here is the summary from AI


Here are the salient points from the discussion and results sections of the article, presented in point format:

**Results:**

*   The SOUL trial randomized 9650 participants aged 50 years or older with type 2 diabetes and either atherosclerotic cardiovascular disease, chronic kidney disease, or both, to receive either once-daily oral semaglutide (maximal dose 14 mg) or placebo, in addition to standard care.
*   **Oral semaglutide was associated with a significantly lower risk of major adverse cardiovascular events (MACE), the primary outcome (a composite of cardiovascular death, nonfatal myocardial infarction, or nonfatal stroke), compared to placebo**. The hazard ratio was 0.86 (95% CI, 0.77 to 0.96; P = 0.006).
*   The incidence of the primary outcome was 12.0% in the oral semaglutide group and 13.8% in the placebo group, with incidence rates of 3.1 and 3.7 events per 100 person-years, respectively.
*   In a prespecified analysis of events occurring through week 156 (3 years), the absolute risk reduction was 2.0 percentage points, and the number needed to treat to prevent one event was 50.
*   The effect of oral semaglutide on the primary outcome was consistent across prespecified sensitivity analyses and most subgroups, including those defined by age, sex, body-mass index, history of cardiovascular or kidney disease, eGFR, and medication use at baseline.
*   Among the components of the primary outcome, **nonfatal myocardial infarction occurred less frequently in the oral semaglutide group** (hazard ratio, 0.74; 95% CI, 0.61 to 0.89).
*   The first confirmatory secondary outcome, major kidney disease events (a five-point composite), did not differ significantly between the two groups (hazard ratio, 0.91; 95% CI, 0.80 to 1.05; P = 0.19).
*   Due to the non-significant result for the first confirmatory secondary outcome, the subsequent confirmatory secondary outcomes (death from cardiovascular causes and major adverse limb events) were not formally tested for significance.
*   Supportive secondary outcomes showed that oral semaglutide was associated with a lower risk of a five-point composite of MACE and fatal or nonfatal myocardial infarction.
*   Oral semaglutide led to a greater reduction in mean glycated hemoglobin level and mean body weight from baseline to week 104 compared to placebo.
*   The incidence of serious adverse events was lower in the oral semaglutide group (47.9%) compared to the placebo group (50.3%; P = 0.02).
*   **Gastrointestinal disorders were more common with oral semaglutide** (5.0%) than with placebo (4.4%) and were the main reason for permanent discontinuation of the trial regimen in the oral semaglutide group.

**Discussion:**

*   **Oral semaglutide significantly reduced the risk of major adverse cardiovascular events compared to placebo** in persons with type 2 diabetes and atherosclerotic cardiovascular disease, chronic kidney disease, or both. This represents a relative risk reduction of 14%.
*   This cardiovascular benefit is consistent with results reported for injectable semaglutide and other GLP-1 receptor agonists with established cardiovascular efficacy.
*   The dominant beneficial effect of oral semaglutide in SOUL was the reduction in nonfatal myocardial infarction, which differs from the PIONEER 6 trial where the dominant effect was on cardiovascular death. This difference might be related to the longer follow-up and larger sample size in SOUL.
*   The non-significant finding for major kidney disease events in SOUL contrasts with the significant kidney benefits observed with injectable semaglutide in the FLOW trial. This discrepancy could be due to differences in baseline eGFR of the study populations or the lower bioavailability of oral semaglutide compared to subcutaneous semaglutide.
*   The availability of an effective oral GLP-1 receptor agonist is relevant to patient preference for oral over injectable diabetes medications.
*   The overall safety profile of oral semaglutide in SOUL was consistent with previous trials, and no new safety signals were observed. The lower incidence of serious adverse events in the oral semaglutide group was mainly driven by fewer cardiac disorders and infections.
*   The higher rate of discontinuation in the oral semaglutide group was primarily due to gastrointestinal symptoms, which are known side effects of GLP-1 receptor agonists.
*   Strengths of the trial include its large sample size and long follow-up duration. The cardiovascular benefits appeared consistent across age subgroups and with injectable semaglutide. The cardioprotective effect was observed even with high concomitant use of other cardiovascular protective drugs like SGLT2 inhibitors.
*   Limitations of the trial include the inclusion criteria that enriched the population for cardiovascular and kidney disease, making it less representative of the general type 2 diabetes population. There was also underrepresentation of women and Black individuals in the trial. The effects of oral semaglutide on kidney-related outcomes require further clarification.

[30/03, 08:48]u3: and here is the audio podcast



[30/03, 11:59]u4: SOUL stratified on and off SGLT2i!

Another publication happened last night in circulation!



[30/03, 12:19]u4: This is 3rd publication happened last night in Diabetes Care after SOUL. MA of all 10 GLP-1RA trials conducted to date including FLOW and SOUL




[30/03, 13:17] CBBLE cable moderator cm: Thanks for sharing.

The authors list one of the limitations of their study as ecological bias (aka aggregation bias).

"in meta-regression on aggregate data, associations between average patient characteristics and the pooled treatment effect do not necessarily reflect true associations between the individual patient-level characteristics and treatment effect. 

The difference between associations of treatment effects with average patient characteristics at group level and true associations with individual patient level characteristics has been referred to as ecological fallacy or aggregation bias."



[30/03, 13:57] u4 in response to u6: 

Good summary:

Few point to note - 

1. Even more 28.5% permanently withdrew in placebo arm 

2. ⁠PP analysis/Trial product estimand showed even larger 18% reduction in primary endpoint 

3. ⁠No additional benefit or harm with or without SGLT2I on CV endpoints 

4. ⁠No analysis of kidney outcomes stratified on or off SGLT2i currently available 

5. ⁠12% insignificant stroke reduction must be read in light of lesser HTN pt and higher HF patients in SOUL compared to SUSTAIN6 

I will come with even more details tonight

[30/03, 14:01] cm : Interesting to see sulphonylurea still leading in both groups ahead of the new gen!


[30/03, 14:11] cm: From the soul nejm paper under discussion and accessible here: https://www.nejm.org/doi/pdf/10.1056/NEJMoa2501006

"Adverse events that led to permanent discontinuation of oral semaglutide or placebo occurred 
in 749 participants (15.5%) in the oral semaglutide group and in 559 participants (11.6%) in the 
placebo group."

The 28.5% figure is from another paper?


[30/03, 14:19]u4: Adverse event and withdrawal is not same. Read full paper you will find what I wrote..😊


[30/03, 14:21]cm: Adverse events that led to permanent discontinuation definitely sounds same as withdrawal?

30/03, 14:55] u4: 1. Adverse events is one thing 
2. Adverse events leading to drug withdrawal is another thing 
3. ⁠Drug discontinued due to any cause is another but final thing 

We are saying 21.7% vs 28.5% didn’t complete the treatment in Sema vs PBO, respectively. Hope it’s clear now 😊😎

[30/03, 15:11]cm: Agree! Withdrawal and "Didn't continue treatment" are definitely not the same as per their trial definitions as there were other causes of discontinuation other than voluntary withdrawal such as getting lost to follow up (which is kind of absconding withdrawal vs LAMA withdrawal)!

[30/03, 14:24]u7: Many people get tired of not feeling the joy
of eating - some have told me that’s why they stopped, not because they did not tolerate…


[30/03, 14:34]u3 sharing more articles presumably detailing the effect of GLP1s on taste:





[30/03, 15:05] cm: As per yesterday's soulful release here:
https://www.nejm.org/doi/pdf/10.1056/NEJMoa2501006, they can still derive some joy from the fact that: by  trading off some distaste in the tongue, they can become one of the (4825-191=4634) higher number of people (because of oral sema) who could avoid a nonfatal myocardial infarction as opposed to the lesser (4825-253=4572) number in the 
placebo group who still had the joy of taste but then 62 more of their placebo brethren developed a non fatal myocardial infarction compared to those on oral sema!

That kind of sums up this entire soulful trial for me. Would be happy to stand corrected from others who have read the full paper. 🙂🙏

30/03, 20:50]u4: Somebody was asking which dose of Oral Sema in SOUL...Here is the answer. Nearly 80% were on 14 mg.


[30/03, 20:53]u2: What % of your patients tolerate 14mg?

[30/03, 20:59]u4: I hate personal experience kind wala answer


[31/03, 19:08]cm: Summarising some learning points from yesterday's soulful journal club:

The estimand here is essentially the relative risk reduction and going by a Hazard Ratio (HR) = 0.86 (95% CI: 0.77–0.96).  
  - **14% RRR** = \( 1 - 0.86 = 0.14 \) (14% is the reduction in relative risk for the oral semaglutide group).  

The trial’s primary estimand uses an **intention-to-treat (ITT) analysis**, which includes all randomized participants regardless of adherence. 

A separate **per-protocol (PP) estimand** (accounting for discontinuations) showed a larger 18% RRR, but this was not the primary estimand.

The more important learning point could be around the 👇

  - Absolute Risk Reduction (ARR) = 1.8% (12.0% vs. 13.8% event rates).

One person in this journal club emphasized **absolute differences** (e.g., 62 fewer nonfatal MIs in the semaglutide group: 191 vs. 253 events).  

  - Pharma often highlights **relative risk** (14% RRR) because it appears more impressive, while absolute risk (1.8% ARR) may seem modest.






Sunday, March 30, 2025

Unboxing Med arena for the first time: comparing different medical LLMs

 

MedArena - LLM Arena for Clinicians

Arena Leaderboard FAQ


🏁 Ask a question below and see the responses of two random models. Then, vote on which model you prefer. 

After voting, click "🆕 New Round" to start a new conversation.

Model A


Please do a thematic analysis of this paper https://www.nejm.org/doi/pdf/10.1056/NEJMoa2501006 and share their results in a PICO format taking care to share the absolute numbers and not relative values in percentages

Certainly! Let's conduct a thematic analysis of the NEJM paper you linked on semaglutide and cardiovascular outcomes and present the results in PICO format with absolute numbers.

Paper: Semaglutide 2.4 mg Once Weekly in Adults with Overweight or Obesity and Cardiovascular Disease


Thematic Analysis and PICO Summary

After carefully reading the paper, here's a thematic analysis summarized in PICO format, focusing on the absolute numbers as requested:

Thematic Areas Identified:

Study Population and Setting: The research focuses on a specific high-risk population – adults with pre-existing cardiovascular disease and overweight or obesity. This highlights the relevance of weight management in secondary cardiovascular prevention. The study was a multinational, placebo-controlled, randomized trial, indicating a rigorous design to establish causality.
Intervention and Comparator: The core intervention is semaglutide 2.4 mg once weekly, delivered subcutaneously. The comparator is a placebo, allowing for a direct assessment of semaglutide's effect beyond standard care. This highlights the investigation of semaglutide as an add-on therapy.
Primary and Secondary Outcomes: The primary outcome, MACE (Major Adverse Cardiovascular Events), underscores the cardiovascular focus. Secondary outcomes including weight loss, changes in cardiometabolic risk factors, and other clinical events broaden the assessment of semaglutide's impact. The hierarchical testing of outcomes reflects a structured and pre-defined approach to evaluating efficacy.
Efficacy in Cardiovascular Events: The study's central finding revolves around the reduction in MACE with semaglutide compared to placebo. The absolute risk reduction, focusing on event counts rather than just relative risk, demonstrates the clinical significance for patients.
Weight Loss and Cardiometabolic Benefits: Significant weight loss achieved with semaglutide is a key theme, and its association with improvements in cardiometabolic risk factors supports the biological plausibility of the cardiovascular benefits.
Safety and Tolerability: The paper details the adverse events, primarily gastrointestinal, associated with semaglutide. Understanding the absolute number of patients experiencing these events is crucial for a balanced benefit-risk assessment. 

Despite higher adverse events, discontinuation rates were similar, suggesting manageable tolerability for many.

Clinical Implications: The authors discuss the potential of semaglutide to be a valuable adjunct in managing cardiovascular risk in overweight/obese patients with existing CVD, highlighting the need for integrated obesity and cardiovascular disease management.


PICO Format with Absolute Numbers:

P - Population:

Who? 17,604 adults with established cardiovascular disease (specifically, a history of myocardial infarction, stroke, or peripheral artery disease) and overweight or obesity (BMI ≥27 kg/m²).


Where? Multinational study across 41 countries.

I - Intervention:

What? Semaglutide 2.4 mg administered subcutaneously once weekly.

How many received it? 8,803 participants were randomly assigned to the semaglutide group.

C - Comparison:

What? Placebo administered subcutaneously once weekly, in addition to usual care.

How many received it? 8,801 participants were randomly assigned to the placebo group.

O - Outcomes:

Primary Outcome: Major Adverse Cardiovascular Events (MACE) (Composite of cardiovascular death, nonfatal myocardial infarction, or nonfatal stroke)

Semaglutide Group: 569 participants experienced a MACE.

Placebo Group: 701 participants experienced a MACE.

Absolute Risk Reduction: 701 - 569 = 132 fewer MACE events in the semaglutide group over the study period in absolute numbers.

Key Secondary Outcome: Death from Cardiovascular Causes

Semaglutide Group: 237 participants died from cardiovascular causes.

Placebo Group: 306 participants died from cardiovascular causes.
Absolute Reduction in Cardiovascular Deaths: 306 - 237 = 69 fewer cardiovascular deaths in the semaglutide group in absolute numbers.

Key Secondary Outcome: All-Cause Death
Semaglutide Group: 415 participants died from any cause.

Placebo Group: 517 participants died from any cause.

Absolute Reduction in All-Cause Deaths: 517 - 415 = 102 fewer deaths from all causes in the semaglutide group in absolute numbers.

Key Secondary Outcome: 

Nonfatal Myocardial Infarction

Semaglutide Group: 225 participants experienced nonfatal myocardial infarction.

Placebo Group: 269 participants experienced nonfatal myocardial infarction.

Absolute Reduction in Nonfatal MI: 269 - 225 = 44 fewer nonfatal MI events in the semaglutide group in absolute numbers.

Key Secondary Outcome: 

Nonfatal Stroke
Semaglutide Group: 199 participants experienced nonfatal stroke.

Placebo Group: 225 participants experienced nonfatal stroke.

Absolute Reduction in Nonfatal Stroke: 225 - 199 = 26 fewer nonfatal stroke events in the semaglutide group in absolute numbers.

Weight Loss at Week 104 (approx. 2 years):

Mean change from baseline in Semaglutide Group: -9.39 kg (This is a mean change, not an absolute number of people achieving a certain loss, but represents the central tendency of weight loss).

Mean change from baseline in Placebo Group: -0.88 kg.

Difference in Mean Weight Loss:
 
Approximately 8.51 kg greater weight loss in the semaglutide group (9.39 - 0.88 = 8.51 kg).

 Again, these are mean changes, not absolute numbers of people.

Adverse Events

(Selected Common Events - Absolute Numbers Approximate due to percentages being primarily reported in some tables, using total Ns):
Any Adverse Event leading to permanent discontinuation:
Semaglutide Group: Approximately 8803 * 0.13 = ~1144 participants (13.0%).
Placebo Group: Approximately 8801 * 0.11 = ~968 participants (11.0%).
Gastrointestinal Disorders (Any):
Semaglutide Group: Approximately 8803 * 0.67 = ~5900 participants (66.7%).
Placebo Group: Approximately 8801 * 0.48 = ~4224 participants (48.4%).
Serious Adverse Events:
Semaglutide Group: Approximately 8803 * 0.23 = ~2025 participants (23.0%).
Placebo Group: Approximately 8801 * 0.24 = ~2112 participants (24.0%).
Results Summary in PICO Form:

In adults with established cardiovascular disease and overweight or obesity (P), treatment with semaglutide 2.4 mg weekly (I) compared to placebo (C) resulted in a significant reduction in major adverse cardiovascular events (MACE). Over the study period, there were 132 fewer MACE events, 69 fewer cardiovascular deaths, and 102 fewer deaths from any cause in the semaglutide group in absolute numbers. Semaglutide also led to significantly greater weight loss. While gastrointestinal adverse events were more common with semaglutide, serious adverse events and discontinuations due to adverse events were broadly similar between groups.

Important Considerations:

Absolute vs. Relative Risk: While this PICO summary highlights absolute numbers as requested, it's important to remember that the paper also reports relative risks (hazard ratios), which are essential for understanding proportional reductions in risk. Both perspectives are valuable.

Approximations for Adverse Events: For some adverse event numbers, especially when reported primarily as percentages in the paper's tables, I've provided approximate absolute counts by multiplying the percentage by the total group size. This offers an idea of the scale but may not be precisely the exact counts if percentages were rounded in the original paper. Where possible, I extracted directly reported absolute event counts.

Study Duration: The study duration is important for interpreting the absolute event reductions. These reductions occurred over a median follow-up of approximately 3.3 years.


Context is Key: This PICO summary is focused on the quantitative results. A full thematic analysis would also consider the discussion section, limitations, and broader implications, which were touched upon in the initial thematic area identification.

This PICO summary, focused on absolute numbers derived from the NEJM paper, provides a structured overview of the key findings regarding semaglutide's impact on cardiovascular outcomes in the specified population.

Model B

Please do a thematic analysis of this paper https://www.nejm.org/doi/pdf/10.1056/NEJMoa2501006 and share their results in a PICO format taking care to share the absolute numbers and not relative values in percentages

I'm unable to access subscription-based content or specific paywall sites, like the New England Journal of Medicine (NEJM), to read the paper you referenced. However, if you provide the key details, such as the study's title, abstract, or main findings, I can help you create a thematic analysis and organize the results in a PICO (Population, Intervention, Comparison, Outcome) format.

Feel free to share text or key details from the study, and I'll assist you!

Keep chatting, or vote on the model you prefer:

👈 Prefer A
👉 Prefer B
🤝 Tie
👎 Prefer Neither

Clicked on prefer A

And then it replied:

Model A was: google/gemini-2.0-flash-thinking-exp:free

Model B was: openai/gpt-4o-2024-11-20

Open access Med Arena here: https://medarena.ai/login




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Sunday, March 16, 2025

Project, 7 years of Narketpally syndrome beginning with individual phenotypic encounters with the lesser known Narketpally ligamental invisible pillow syndrome as opposed to the globally known catatonic psychological invisible pillow syndrome: optimizing clinical complexity of Fluorosis in Nalgonda

Summary: This project aims to establish deep phenotypic data driven insights into the manifestations of fluorosis in district Nalgonda, particularly Narketpally where the team has had frequent encounters with an epidemiological tip of the iceberg population that often presents to the hospital outpatient and inpatient with manifestations of fluorosis as a frequent comorbidity of metabolic syn driven organ dysfunction. Of particular interest is signposting of the lesser known Narketpally ligamental invisible pillow syndrome as opposed to the globally known catatonic psychological invisible pillow syndrome other than optimizing clinical complexity in those patients of fluorosis and multimorbidities utilising current medical cognition tools.




Introduction:

As an MBBS student in the 80s, one leafing through the text book of community medicine wouldn't surely miss reading about the Nalgonda technique and it's efficacy in curbing the menace of fluorosis in the district.

More about it here in rare and generously preserved documents published by NEERI, Nagpur and archived by a Netherlands based global organisation here: https://www.ircwash.org/biblio/author/105

It was hence with excitement that some of us were excited to join the Narketpally team and notice this text book problem in the very first week of joining as reflected upon in this online learning portfolio post here:

"Today is my first day of joining my new workplace, a medical college 60 kms from Hyderabad and an epicenter for an epidemic of people who gradually start walking with a stick to balance themselves and begin to lose the normal sensations in their limbs. I approached these people in the images below,  requested to examine them (they had never bothered to consult a doctor for this problem and had come to visit the hospital as patient relatives) and I found very prominent neurological findings suggestive of a cervical spinal cord involvement. These persons were having a gradual paralysis of all four limbs since many years but they had taken this for granted. The early seeds to detecting the cause of this problem was perhaps sown in US based epidemiologic research in the early 20th century (more here? https://www.nidcr.nih.gov/OralHealth/Topics/Fluoride/TheStoryofFluoridation.htm but I am still searching for literature on how and when this was first discovered and reported from my current location 60 kms from Hyderabad."






And then on further review of literature I found a few articles and studies done from Hyderabad medical college teams from 1950s with meticulous description of how they found a correlation between ground water levels of fluoride (external medicine) vs internal body levels of fluoride (internal medicine) here: 
https://pmc.ncbi.nlm.nih.gov/articles/PMC1981710/?page=1


While the data capture of each individual encounter started in 2017 there are a few archived and accessible to human memory driven search from the 5000 Narketpally case reports accessible at our department dashboard here: https://medicinedepartment.blogspot.com/2022/02/?m=1

Currently the issue is that blogspot case reports are not amenable to google searches and even to search for fluorosis from the dashboard one would need to separately access at least 1000 online learning portfolios available there and search each one of those separately!


A sample case focusing on the physical pillow syndrome from an elective student's online learning portfolio from 2019:


To quote from the above link, "neck is so stiff that when I lie down its difficult for me to sleep without pillow because i cannot touch the bed with back of my head and without pillow my head stays in air(since 2yrs)."

Also check out the photographs of the physical imaginary pillow as well as other skeletal features of fluorosis in the link above.

Sample case with photo of the physical imaginary pillow as well as other skeletal fluorosis images from 2022 elective student:


Sample case with photo of the physical imaginary pillow as well as links to his other skeletal fluorosis images/CT video 
from our 2025 elective student: 


Also sharing a few diagnostic uncertainty outliers from our collective CBBLE:

[06/03, 12:11] CBBLE moderator CM: OPD now : 26F with neck pains and early morning neck stiffness since 1 month. Any inputs on the posterior longitudinal ligament?




[06/03, 14:39]AS: Looks clean to me

[06/03, 14:59]CM: Agree but why is the area around the posterior longitudinal ligament , essentially the posterior border of her cervical vertebrae appearing to be hyperdense?


The above lady was likely having spondyloarthropathy that can be clarified on follow up and spondyloarthropathy is an interesting differential for fluorosis as reported earlier here: https://pmc.ncbi.nlm.nih.gov/articles/PMC9450208/#:~:text=Skeletal%20fluorosis%20can%20mimic%20various,rheumatoid%20arthritis%2C%20osteoarthritis%20or%20spondyloarthropathy.&text=The%20early%20stages%20of%20the,tendinitis%2C%20and%20early%20morning%20stiffness. and many other platforms.