Table 1.
Baseline Characteristics of the NIH-AARP Study Population (n = 170,481), by Daily Sitting Time Categories, 1995 – 1996
| Participant characteristics | Daily sitting time
|
||||
|---|---|---|---|---|---|
| < 3h/day | 3 – 4 h/day | 5 – 6 h/day | 7 – 8 h/day | ≥ 9 h/day | |
| Age (yrs) | 62.9 (5.1) | 63.0 (5.1) | 62.6 (5.2) | 61.6 (5.3) | 60.5 (5.4) |
| Non-Hispanic white (%) | 91.3 | 94.0 | 94.4 | 94.7 | 95.1 |
| College graduate (%) | 38.6 | 43.6 | 50.2 | 56.7 | 59.8 |
| Currently married or de facto (%) | 84.4 | 85.7 | 85.7 | 85.0 | 83.3 |
| Body mass index (kg/m2) | 26.8 (3.6) | 26.9 (3.7) | 27.1 (3.8) | 27.2 (4.0) | 27.5 (4.2) |
| Family history of prostate cancer (%) | 8.2 | 8.3 | 8.4 | 8.3 | 8.9 |
| Personal history of diabetes (%) | 9.0 | 9.3 | 9.7 | 9.8 | 10.3 |
| Previous prostate specific antigen screeninga (%) | 70.7 | 72.5 | 72.6 | 71.8 | 68.8 |
| Previous digital rectal examination screeninga (%) | 81.9 | 83.8 | 84.8 | 84.5 | 83.1 |
| Caloric intake (kcal/day) | 2006 (863) | 1979 (806) | 1994 (791) | 2018 (789) | 2066 (807) |
| Alcohol intake (g/day) | 15.9 (37.3) | 16.5 (36.9) | 17.3 (37.2) | 17.5 (37.8) | 17.9 (39.7) |
| Never smoker (%) | 31.5 | 29.2 | 29.3 | 30.4 | 30.0 |
| Recreational physical activitya | |||||
| < 1 h/wk | 21.5 | 21.9 | 23.7 | 28.2 | 36.1 |
| 1 – 3 h/day | 23.1 | 24.9 | 25.8 | 26.8 | 26.7 |
| 4 – 7 h/day | 25.9 | 27.0 | 26.6 | 25.6 | 22.4 |
| > 7 h/day | 29.5 | 26.3 | 23.9 | 19.4 | 14.8 |
| Television or video viewinga | |||||
| < 1 h/day | 9.3 | 5.2 | 5.1 | 6.8 | 7.4 |
| 1 – 2 h/day | 46.5 | 30.4 | 23.5 | 24.1 | 23.6 |
| 3 – 4 h/day | 35.8 | 55.1 | 47.1 | 37.0 | 36.8 |
| 5 – 6 h/day | 6.1 | 7.1 | 21.4 | 23.8 | 19.1 |
| ≥ 7 h/day | 2.3 | 2.2 | 3.0 | 8.3 | 13.1 |
Data are mean (SD) or %
a
Assessed by second questionnaire (1996 – 1997)