John was overweight, out of shape, and experiencing fatigue. What did he do? He removed foods rich in refined carbohydrates and sugars from ...
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Showing posts with label statistics. Show all posts
Showing posts with label statistics. Show all posts
Standard deviation is not the same as range of variation
Often research results are expressed in means and standard deviations. For example, in the study reviewed in this post , it is stated that t...
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The steep obesity increase in the USA in the 1980s: In a sense, it reflects a major success story
Obesity rates have increased in the USA over the years, but the steep increase starting around the 1980s is unusual. Wang and Beydoun do a g...
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We share an ancestor who probably lived no more than 640 years ago
This post has been revised and re-published . The original comments are preserved below. Typically this is done with posts that attract man...
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The 2013 PLoS ONE sugar and diabetes study: Sugar from fruits is harmless
A new study linking sugar consumption with diabetes prevalence has gained significant media attention recently. The study was published in ...
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The China Study II: Fruit consumption and mortality
I ran several analyses on the effects of fruit consumption on mortality on the China Study II dataset using WarpPLS . For other China Study ...
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The China Study II: Does calorie restriction increase longevity?
calorie restriction,
China Study,
longevity,
multivariate analysis,
obesity,
research,
statistics,
warppls
The idea that calorie restriction extends human life comes largely from studies of other species. The most relevant of those studies have be...
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Calling self-experimentation N=1 is incorrect and misleading
This is not a post about semantics. Using “N=1” to refer to self-experimentation is okay, as long as one understands that self-experimentati...
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The China Study one more time: Are raw plant foods giving people cancer?
cancer,
China Study,
J curve,
multivariate analysis,
refined carbs,
research,
statistics,
U curve,
warppls
In this previous post I analyzed some data from the China Study that included counties where there were cases of schistosomiasis infection....
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The China Study again: A multivariate analysis suggesting that schistosomiasis rules!
In the comments section of Denise Minger’s post on July 16, 2010 , which discusses some of the data from the China Study (as a follow up to ...
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The China Study II: Wheat, dietary fat, and mortality
In this post on the China Study II data we have seen that wheat apparently displaces dietary fat a lot, primarily fat from animal sources. ...
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Strong causation can exist without any correlation: The strange case of the chain smokers, and a note about diet
causation without correlation,
China Study,
correlation does not imply causation,
research,
smoking,
statistics
Researchers like to study samples of data and look for associations between variables. Often those associations are represented in the form ...
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The China Study: With a large enough sample, anything is significant
There have been many references recently on diet and lifestyle blogs to the China Study. Except that they are not really references to the C...
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The China Study II: Wheat flour, rice, and cardiovascular disease
cardiovascular disease,
China Study,
multivariate analysis,
research,
rice,
statistics,
warppls,
wheat
In my last post on the China Study II, I analyzed the effect of total and HDL cholesterol on mortality from all cardiovascular diseases. T...
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