BMI and All Cause Mortality-<27.5 and <30

While I know it is more than the BMI ( http://www.wsj.com/articles/too-much-fat-try-a-whole-body-scan-1439828879) this extensive study from 2016 from Lancet  is interesting

with our message..get patients that have BMI’s above 30 to get below 27.5 and 30 

http://www.thelancet.com/journals/lancet/article/PIIS0140-6736(16)30175-1/abstract

Nine groups of BMI versus all-cause mortality, with use of the primary prespecified analysis

15·0–<18·5 kg/m2 18·5–<20·0 kg/m2 20·0– <22·5 kg/m2 22·5–<25·0 kg/m2 25·0–<27·5 kg/m2 27·5–<30·0 kg/m2 30·0–<35·0 kg/m2 35·0–<40·0 kg/m2 40·0–<60·0 kg/m2
Participants/deaths 114 091/12 726 230 749/20 989 838 907/72 701 1075 894/98 833 821 303/84 952 428 800/45 341 330 840/37 318 80 827/9 179 30 044/3 840
HR (95% CI) 1·51 (1·43–1·59) 1·13 (1·09–1·17) 1·00 (0.98–1.02) 1·00 (0·99–1·01) 1·07 (1·07–1·08) 1·20 (1·18–1·22) 1·45 (1·41–1·48) 1·94 (1·87–2·01) 2·76 (2·60–2·92)

189 studies; 3 951 455 participants; 385 879 deaths. The primary prespecified analysis in never-smokers without known chronic disease at baseline, excluding the first 5 years of follow-up (with normal weight and overweight categories further subdivided into: 18·5–<20·0 kg/m2, 20·0–<22·5 kg/m2, 22·5–<25·0 kg/m2, 25·0–<27·5 kg/m2, and 27·5–<30·0 kg/m2). CIs were calculated using floating variance estimates (reflecting independent variability within each group, including the reference group). Reference group is 22·5–<25·0 kg/m2. All analyses are adjusted for age and sex. Baseline BMI categories were defined by WHO. BMI=body-mass index. HR=hazard ratio.

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