其实在这个研究里，还有一些相关因素很难排除

比如论文提及的：

 The mean age at recruitment was lower in the fish eaters and vegetarians than in the meat eaters. Smoking rates were low overall, with only 14.4% of meat eaters, 11.2% of fish eaters and 11.4% of vegetarians reporting that they were smokers at the time of recruitment. The median BMI was 1.5 kg m⁻² lower in vegetarians than in meat eaters, and the median alcohol consumption was 1.0 g per day lower in vegetarians than in meat eaters. Fish eaters had similar mean BMI to the vegetarians and had similar alcohol consumption to the meat eaters. The proportions of men and women who reported a relatively high level of physical activity were higher among fish eaters and vegetarians than among meat eaters. The proportion of women who were nulliparous at recruitment was higher among fish eaters and vegetarians than among meat eaters, and the proportion of women who had ever used oral contraceptives was lower among fish eaters and vegetarians than among meat eaters. 

 

所有跟帖： 

• 嗯，每个研究都有一些局限，特别是这种人群的研究。所以结果的解释也应该谨慎。 -吃与活- ♂ (0 bytes) () 01/12/2016 postreply 11:11:23

• 就是老狼文章里所指的"Healthy Person Bias" -Lily168- ♀ (0 bytes) () 01/12/2016 postreply 13:17:57