Table 1.
Age-adjusted baseline characteristics of the Women’s Lifestyle Validation Studies study population by quartiles of total activity counts per day measured by accelerometer, United States, 2010–2012.
| Quartiles of Total Activity Counts per Day | ||||||||
|---|---|---|---|---|---|---|---|---|
| Q1 (n=138) | Q2 (n=138) | Q3 (n=123) | Q4 (n=127) | |||||
| Mean (SD) | % | Mean (SD) | % | Mean (SD) | % | Mean (SD) | % | |
| Age, years a | 67 (9) | 65 (9) | 62 (9) | 60 (9) | ||||
| BMI, kg/m2 | 29.2 (6.5) | 27.5 (5.6) | 25.2 (4.7) | 24.6 (4) | ||||
| Postmenopausal women, % | 83 | 85 | 81 | 84 | ||||
| Age at menopause, years a | 47 | 49 | 49 | 50 | ||||
| Current use of postmenopausal hormones, % | 6 | 5 | 3 | 8 | ||||
| Age at menarche < 12 years, % 2 | 63 | 66 | 62 | 58 | ||||
| Nulliparous, % | 4 | 7 | 13 | 13 | ||||
| Parity among parous | 2.4 (1.1) | 2.5 (1.0) | 2.5 (1.0) | 2.7 (1.0) | ||||
| Age at first birth, years a | 24.5 (5.3) | 25.5 (5.1) | 25.2 (6.8) | 24.8 (6.6) | ||||
| Caucasian, % | 81 | 92 | 93 | 96 | ||||
| Family history of cancer b, % | 45 | 33 | 34 | 30 | ||||
| Family history of diabetes, % | 30 | 16 | 24 | 14 | ||||
| Family history of MI, % | 30 | 23 | 28 | 17 | ||||
| Current multivitamin use, % | 63 | 59 | 65 | 54 | ||||
| Current smoker, % | 2 | 1 | 2 | 3 | ||||
| Total energy, kcal/day | 1831 (512) | 1892 (541) | 1990 (577) | 2022 (515) | ||||
| Alcohol, g/day | 8.3 (14.4) | 8.1 (10.6) | 9.3 (11.8) | 8.6 (10.3) | ||||
| Total fiber, g/day | 22 (6) | 24 (6) | 23 (5) | 24 (6) | ||||
| Caffeine, mg/day | 172 (151) | 193 (139) | 164 (124) | 167 (130) | ||||
Abbreviations: BMI, body mass index; SD, standard deviation.
a
Value is not age adjusted.
b
Ovarian, breast, colon, pancreatic, melanoma, uterine, and kidney cancers were included in deriving this variable.