Why do we pay so much attention to such unreliable data? (I think that’s a rhetorical question.) Would we let the FDA approve/disapprove drugs based on observational data ?
Why observational diet data is unreliable, Exhibit #7493: in a new @KevinH_PhD study, dieters underreport consumption by hundreds of calories. And that's 24-hour recall, which is supposed to be the most reliable. https://onlinelibrary.wiley.com/doi/epdf/10.1002/oby.22389?author_access_token=9vjrhJkQjOtQgcMKwN7wJk4keas67K9QMdWULTWMo8P2DQ_drSy-xZzYPL-kwCtIzmJ6J0t8Q2ZkIKBdMC62cTlsTesWhNxZb-PXAyyHBAwbZ4jyeoHKJJT1wJZYCD9A …pic.twitter.com/GvouHWUgUY
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Because we don't have much else. RCT data is very limited and short-term.
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"Because we don't have much else" is not a reason for scientists, health organizations, dietitians and journalists to imply that research using unscientific data gathered using memory based assessment methods like FFQs produces valid and actionable results. /1
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Underreporting is not restricted to observational studies.
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No of course not. The study I cited wasn't an observational study. But it brings up the larger point that people cannot accurately report what they eat. It's a problem in RCTs, but it's a bigger problem in epi.
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We keep hearing this over and over from doctors, dietitians and researchers. That's why we're trying to automate meal logging with computer vision. Our app (
@getbitesnap) is being used for a few dietary research studies and we're thinking of building more tools to support that. -
I eagerly await technology that A) logs consumption accurately and B) doesn't change what people eat because they're being logged.
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I really hope AR won't be a dud so we can see this happen. Also, B) is not so bad if it can cause lasting change.
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Given that calorie underreporting is incredibly well-established, it stands to reason that overconsumption of calories plays a far larger role in health-related dietary problems than most people already assign to it (as opposed to *type* of food or some other factor).
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Amen brother.
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Double Amen Brother
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Most vital question to ask is what makes people who desire to weigh less overeat? 3 Words Man Made Food No one binges on steak eggs veggies aka real food.
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1. Yes they do. 2. Interesting you don’t include the all-natural fruit, nuts, cheese, sweeteners, starchy veg, legumes, grains. 3. Veg and meat have been selectively bred for centuries to increase yield and palatability.
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It’s processed food (man made food) that’s making us sick. T2D is better named “Processed Food Disease” not my words but Dr Lustig’s.pic.twitter.com/zfoKRVQgIu
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Thanks for this information which is really interesting.
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3 * 24 hour recalls are considered the gold standard for self-report dietary intake for individuals - trying to sample weekdays / weekends.
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That’s what was done in this study
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Nice work, Kevin. Although having taken up the battle, I suspect you'll spend the rest of your career driving the stake through the 24-h recall's heart.
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yet another one of these stupid " add back carbs" until you are comfortable instruction thereby making the entire low carb part pointless.
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