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I let ChatGPT analyze a decade of my Apple Watch data, then I called my doctor

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Re: I let ChatGPT analyze a decade of my Apple Watch data, then I called my doctor

#171

Earlier quoted context omitted.

> Doctor's don't care about that Literally all of them?

When humans talk, they use generalizations (and don't need to annouce them). Here it means that most doctors don't care about that. Follow that rule next time you read such a statement in a context that's not formal math.

> most

That is not even true. We are talking anecdotal evidence here.

Re: I let ChatGPT analyze a decade of my Apple Watch data, then I called my doctor

#172

> There were big swings in my resting heart rate whenever I got a new Apple Watch, suggesting the devices may not have been tracking the same way. First of all, wrist based HR measurements are not reliable. If you feed ChatGPT a ton of HR data that is just plain wrong, expect a bad result. Everyone who wants to track HR reliably should invest in a chest strap. The VO2 Max calculation is heavily based on your pace at…

In this case the article's guess is probably accurate. Apple did change how they measure RHR in WatchOS 11.2. If the author was using an Apple Watch that doesn't support 11.2 and then switched to one that does, a swing was very likely.

Re: I let ChatGPT analyze a decade of my Apple Watch data, then I called my doctor

#173

Earlier quoted context omitted.

Many of those metrics are population or sampling measures and are confounded by many factors at an individual level. The most notorious of which is BMI; it is practically a category error to infer someone's health or risk by individual BMI, and yet doing so remains widespread amongst people that are supposed to know better. Instrumentation and testing become primarily useful at an individual level to explain or inves…

> The most notorious of which is BMI; it is practically a category error to infer someone's health or risk by individual BMI, and yet doing so remains widespread amongst people that are supposed to know better. BMI works fine for people who aren't very muscular, which is the great majority of people. Waist to height ratio might be more informative for people with higher muscle mass.

My understanding is that it doesnt even do that, because it creates false negatives for the so called skinny fat body type: significant visceral fat mass, which is what we are concerned about, but not much muscle or peripheral fat mass, thereby not being flagged by BMI screens, even though they are at risk.

Re: I let ChatGPT analyze a decade of my Apple Watch data, then I called my doctor

#174

I dunno, if the Apple Watch said he had a vo2max of 30, that probably means he can’t run a mile in less than 12 minutes or so. He’s probably not at all healthy…

I had a "below average" VO2 max score based on my Apple Watch measurements. It was ~40 mL/kg/min, in the span of about a month it jumped up to 53 mL/kg/min, which is "high" for my age group. So what happened? I started running instead of cycling as my primary form of cardio.

My hypothesis is that the apple watch estimates higher if you are running rather than pedaling. I definitely don't think my cardio vascular went from poor to great over a month. It seems more likely that it was maybe underestimating, and perhaps now is overestimating.

Re: I let ChatGPT analyze a decade of my Apple Watch data, then I called my doctor

#175

Earlier quoted context omitted.

Some of the metrics were out of whack, I think my average body temp was up along with my resting heart rate both asleep and awake. It somehow takes all that and gave me a "you might be sick" notification.

How is that predicting in advance though? Sounds like it measured active symptoms like a change in body temp etc. That's not prediction, that's reaction.

I think it is fair to assume they meant before symptoms? Which, yes, your heart rate is a symptom. No, it isn't one most people consider.

Re: I let ChatGPT analyze a decade of my Apple Watch data, then I called my doctor

#176

I'll preface this with I generally trust doctors. I think on the whole they are well positioned to provide massive benefit to their patients. I will also preface this with saying I do not think any LLM is better than the average doctor and that you are far better served going to your doctor than asking ChatGPT what your health is like on any factor. But I'll also say that the quality of doctors varies massively, and…

I think the fairest test is: what is the best and fastest way to reduce medical uncertainty? For rare ailments with a single cause and exclusive symptoms, that can be accurately described with simple language (no medical jargon), its possible that an LLM is better than a doctor.

For more ambiguous situations where you need actual tests, I am skeptical of using LLMs.

Re: I let ChatGPT analyze a decade of my Apple Watch data, then I called my doctor

#177
post #109
post #107

> I let ChatGPT analyze a decade of my Apple Watch data, then I called my doctor ... and you won't believe what happened next! Can we do away with the clickbait from MSN? The article is about LLMs misdiagnosing cardiovascular status when given fitness tracker data

I have www.msn.com added to the blocklist of my router's adblock settings so that I can stop seeing nonsense in Skype/Windows. It worked for a while. Of course, the real solution is to stop using Microsoft products, which I did.

Frankly the main thing I take issue with is dumping these garbage titles onto HN. They can do what they want on their site

Re: I let ChatGPT analyze a decade of my Apple Watch data, then I called my doctor

#178
I think I found the proper sleep amount for me (sleep deprived). It has me feeling agitated/motivated. It's around 5 hours. What I need is something like Apple Watch to detect when I've actually fallen asleep then set the alarm for that long.

Re: I let ChatGPT analyze a decade of my Apple Watch data, then I called my doctor

#179
There needs to be more documentation about what info was provided to the LLM and in which format before we decide that LLMs are necessarily bad at this. That said, you would expect the offering from a $500bn company to be more robust and better tested than this, assuming this is reported accurately.

Re: I let ChatGPT analyze a decade of my Apple Watch data, then I called my doctor

#180

A year or so ago, I fed my wife's blood work results into chatgpt and it came back with a terrifying diagnosis. Even after a lot of back and forth it stuck to its guns. We went to a specialist who performed some additional tests and explained that the condition cannot be diagnosed with just the original blood work and said that she did not have the condition. The whole thing was a borderline traumatic ordeal that I'm…

It's interesting because presumably you were too ashamed to tell the doctor "we pasted stuff into chatgpt and it said it means she is sick", because if you had said that he would have looked at the bloodwork and you could have avoided going to a specialist. It's an interesting cognitive dissonance that you both trusted it enough to go to a specialist but not enough to admit using it.

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