Table 1 Characteristics of the study population by light and moderate-to-vigorous intensity physical activity during two periods of life: 118,899 postmenopausal women in the NIH-AARP Diet and Health Study
Light activity | Total | Ages 15-18 years | Ages 19-29 years | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Â | Â | Never/Rarely | <1 hr/wk | 1-3 hrs/wk | 4-7 hrs/wk | >7 hrs/wk | Never/Rarely | <1 hr/wk | 1-3 hrs/wk | 4-7 hrs/wk | >7 hrs/wk |
Participants, No. (%) | 118899 | 10439 (9) | 9199 (8) | 26777 (23) | 26390 (22) | 43700 (37) | 5998 (5) | 6400 (5) | 20987 (18) | 27569 (23) | 55442 (47) |
Age at baseline (yrs) | 62.9 | 62.6 | 62.4 | 62.7 | 62.9 | 63.1 | 62.7 | 62.3 | 62.5 | 62.7 | 63.1 |
BMI, current* (kg/m2) | 26.7 | 26.4 | 26.3 | 26.5 | 26.7 | 27.0 | 26.5 | 26.5 | 26.6 | 26.7 | 26.8 |
BMI at age 18* (kg/m2) | 20.9 | 21.0 | 21.0 | 20.9 | 20.9 | 20.7 | 21.0 | 21.1 | 21.0 | 20.9 | 20.8 |
Caucasian (%) | 91.2 | 89.5 | 90.4 | 91.5 | 91.9 | 91.8 | 85.6 | 88.4 | 89.8 | 91.7 | 92.9 |
College education (%) | 31.5 | 32.3 | 32.9 | 33.0 | 33.1 | 29.7 | 32.9 | 34.4 | 35.7 | 33.9 | 28.8 |
Family history of breast cancer†(%) | 13.7 | 12.8 | 13.3 | 13.7 | 13.8 | 13.8 | 13.5 | 12.8 | 13.6 | 13.5 | 13.8 |
Current smoker (%) | 13.4 | 11.2 | 12.2 | 13.0 | 12.9 | 14.7 | 11.9 | 11.8 | 12.8 | 13.3 | 14.0 |
Ever MHT use‡ (%) | 61.7 | 61.2 | 60.8 | 61.3 | 62.0 | 62.3 | 60.7 | 60.3 | 61.0 | 61.6 | 62.5 |
Age at menarche (yrs) | 12.50 | 12.52 | 12.49 | 12.47 | 12.47 | 12.52 | 12.53 | 12.51 | 12.48 | 12.49 | 12.50 |
Age at first birth (yrs) | 22.98 | 23.19 | 23.34 | 23.24 | 23.13 | 22.64 | 23.19 | 23.34 | 23.24 | 23.13 | 22.64 |
Parity (no. of children) | 2.01 | 1.90 | 1.92 | 1.94 | 2.00 | 2.09 | 1.87 | 1.78 | 1.78 | 1.90 | 2.19 |
Age at menopause(yrs) | 47.02 | 47.31 | 47.47 | 47.47 | 47.35 | 47.03 | 47.08 | 47.43 | 47.42 | 47.40 | 47.14 |
Alcohol intake (g/d) | 6.2 | 6.5 | 6.5 | 6.5 | 6.3 | 5.8 | 6.2 | 6.3 | 6.5 | 6.4 | 6.0 |
Moderate-to-vigorous activity | Â | Ages 15-18 years | Ages 19-29 years | ||||||||
| Â | Â | Never/Rarely | <1 hr/wk | 1-3 hrs/wk | 4-7 hrs/wk | >7 hrs/wk | Never/Rarely | <1 hr/wk | 1-3 hrs/wk | 4-7 hrs/wk | >7 hrs/wk |
Participants, No. (%) | 118899 | 15359 (13) | 10080 (9) | 25250 (21) | 26429 (22) | 39845 (34) | 11585 (10) | 9867 (8) | 25686 (22) | 30175 (25) | 39603 (33) |
Age at baseline (yrs) | 62.9 | 62.9 | 62.8 | 62.9 | 62.8 | 62.8 | 62.8 | 62.5 | 62.6 | 62.8 | 63.2 |
BMI, current* (kg/m2) | 26.7 | 26.7 | 26.6 | 26.6 | 26.6 | 26.9 | 27.0 | 26.8 | 26.6 | 26.6 | 26.8 |
BMI at age 18* (kg/m2) | 20.9 | 21.3 | 21.0 | 21.0 | 20.8 | 20.7 | 21.3 | 21.1 | 20.9 | 20.8 | 20.7 |
Caucasian (%) | 91.2 | 90.4 | 91.1 | 91.4 | 92.0 | 91.6 | 88.8 | 90.6 | 91.1 | 92.1 | 92.3 |
College education (%) | 31.5 | 30.5 | 31.5 | 32.4 | 33.7 | 30.7 | 33.7 | 36.3 | 35.3 | 32.8 | 27.0 |
Family history of breast cancer†(%) | 13.7 | 13.5 | 12.7 | 13.7 | 14.0 | 13.7 | 13.4 | 13.0 | 13.8 | 13.6 | 13.9 |
Current smoker (%) | 13.4 | 10.1 | 10.9 | 12.7 | 13.4 | 15.7 | 10.6 | 11.2 | 12.0 | 13.4 | 15.7 |
Ever MHT use‡ (%) | 61.7 | 59.2 | 60.9 | 61.5 | 63.3 | 62.4 | 58.4 | 62.1 | 62.1 | 62.9 | 61.8 |
Age at menarche (yrs) | 12.50 | 12.42 | 12.45 | 12.48 | 12.50 | 12.55 | 12.41 | 12.46 | 12.49 | 12.50 | 12.54 |
Age at first birth (yrs) | 22.98 | 23.32 | 23.26 | 23.18 | 23.03 | 22.66 | 23.56 | 23.54 | 23.40 | 23.04 | 22.45 |
Parity (no. of children) | 2.01 | 1.86 | 1.94 | 1.97 | 2.02 | 2.09 | 1.75 | 1.82 | 1.88 | 2.02 | 2.20 |
Age at menopause(yrs) | 47.02 | 47.43 | 47.52 | 47.46 | 47.30 | 46.99 | 47.49 | 47.64 | 47.54 | 47.30 | 46.96 |
Alcohol intake (g/d) | 6.2 | 6.0 | 6.2 | 6.3 | 6.4 | 6.1 | 6.0 | 6.1 | 6.3 | 6.3 | 6.1 |