Table 1.
Physical activities and recreational inactivity (TV, videos, video/computergames) at age 14yr and other characteristics of 7034 females in the Growing Up Today Study, according to total METS per day at age 14yr. (Total METS includes walking and moderate to vigorous physical activity.) Shown are Mean (SD) or %.
| Tertile of METS/day at age 14yr | |||
|---|---|---|---|
| Range | T1 (0–7.40) |
T2 (7.41–13.95) |
T3 (13.96–42.73) |
| N = | 2344 | 2345 | 2345 |
| Activities and Inactivity at age 14yr | |||
| METS/day | 4.28 (1.99) | 10.43 (1.87) | 20.91 (5.96) |
| Moderate/Vigorous Activity (hrs/day) | 0.69 (.52) | 1.50 (.58) | 2.80 (.98) |
| Walking (hrs/day) | 0.18 (.23) | 0.28 (.33) | 0.52 (.46) |
| Recreational Inactivity (hrs/day) | 2.61 (1.68) | 2.55 (1.54) | 2.58 (1.62) |
| Sleep (hrs/night) | 7.64 (1.03) | 7.55 (1.03) | 7.42 (1.15) |
| Other Characteristics | |||
| Biopsy-confirmed BBDa | 1.8% | 1.5% | 2.3% |
| Age (yrs) at Baseline (1996) | 11.93 (1.60) | 11.91 (1.60) | 12.21 (1.61) |
| Childhood BMI (kg/m2)b | 18.31 (3.59) | 18.10 (3.26) | 18.02 (3.11) |
| Age at menarche (yr) | 12.86 (1.19) | 12.87 (1.21) | 12.87 (1.22) |
| Pregnancy ever c | 5.2% | 4.3% | 4.0% |
| Teen alcohol (drinks/day) | 0.15 (.34) | 0.21 (.42) | 0.27 (.46) |
| Age 14 peanut butter, nuts (servings/wk) | 1.04 (1.43) | 1.18 (1.51) | 1.23 (1.53) |
| Age 14 vegetable protein (gm/day) d | 24.6 (4.7) | 24.9 (5.4) | 24.8 (6.0) |
| Peak Height Growth Velocity (cm/yr) | 8.25 (2.71) | 8.35 (2.67) | 8.19 (2.76) |
| Family History of Breast Disease: | |||
| In Mother or Maternal Aunt: Breast Cancer | 7.0% | 7.6% | 6.8% |
| In Mother: BBD | 16.1% | 19.8% | 19.8% |
a
Benign breast disease in participant, reported to November 1, 2013.
b
BMI at age 10yr, derived from baseline BMI and adjusted to age 10yr [20] using CDC BMI growth charts.
c
Pregnancy reported through 2005 survey.
d
Energy-adjusted.