Table 1.

General characteristics of the five cohorts included in the pooled analysis

CohortNo. of participantsNo. of casesStudy periodNo. of years of follow-up, mean (SD)Age at baseline, mean (SD)Male (%)BMI ≥30 (%)
NIH-AARP Diet and Health Study (ref. 21)498,9575831995–20069.1 (2.9)62.0 (5.4)6122
USRT study (ref. 22)89,5292751983–200615.9 (5.3)40.4 (11.1)239
PLCO study (ref. 23)139,1311681993–20099.6 (3.2)62.6 (5.3)5024
AHS (ref. 24)67,925671993–20059.9 (1.9)46.9 (12.6)5821
BCDDP (ref. 25)53,390631979–199915.3 (2.8)55.4 (8.8)010
Total848,9321,1561979–200910.3 (4.0)58.2 (10.4)5120