Table 1. Selected characteristics according to prospective cohort study.
| Study | Total | Males | Females | Study Entry | Median Follow-Up in Years (Maximum) | Median Age at Entry in Years (Range) | Median Physical Activity in MET-h/wk (IQR) | Mean BMI in kg/m2 (SD) | Percent Ever Smokers | Percent with Co-Morbiditiesa | Deaths |
| NIH-AARP Diet and Health Study | 312,440 | 182,598 | 129,842 | 1996–1997 | 10 (10) | 64 (51–72) | 8 (4–22) | 27.0 (4.8) | 63 | 19 | 36,782 |
| CLUE II | 13,661 | 5,538 | 8,123 | 1998 | 9 (10) | 58 (21–98) | 9 (4–14) | 26.0 (4.7) | 43 | 7 | 2,049 |
| CPS II | 178,402 | 83,766 | 94,636 | 1992–1993 | 13 (14) | 63 (40–91) | 8 (4–18) | 25.9 (4.3) | 56 | 18 | 38,776 |
| U.S. Radiologic Technologists study | 78,528 | 18,234 | 60,294 | 1994–1998 | 8 (10) | 46 (32–97) | 8 (2–22) | 25.8 (5.0) | 46 | 8 | 2,450 |
| Women's Health Study | 39,026 | 0 | 39,026 | 1993–1996 | 13 (15) | 53 (39–90) | 8 (2–20) | 26.0 (5.1) | 49 | 1 | 2,167 |
| Women's Lifestyle and Health study | 32,770 | 0 | 32,770 | 2003 | 4 (4) | 52 (41–62) | 11 (4–20) | 25.3 (4.2) | 57 | 10 | 241 |
| Total | 654,827 | 290,136 | 364,691 | 1992–2003 | 10 (15) | 61 (21–98) | 8 (4–22) | 26.4 (4.7) | 58 | 16 | 82,465 |
a
History of cancer and/or heart disease.
IQR, interquartile range; SD, standard deviation.