Table 1.
Age-Adjusted Characteristics of Premenopausal Women According to Category of Total Dairy-Food Intake at Baseline, Nurses’ Health Study II, 1991a,b
| Characteristic | Total Dairy-Food Intake, no. of servings | |||||
|---|---|---|---|---|---|---|
| <2/Week (n = 2,091) | 2–4/Week (n = 5,334) | 5–6/Week (n = 6,062) | 1/Day (n = 28,422) | 2–3/Day (n = 32,432) | ≥4/Day (n = 11,899) | |
| Age, yearsc | 36.8 (4.5) | 36.5 (4.6) | 36.3 (4.6) | 36.0 (4.6) | 35.6 (4.6) | 35.2 (4.5) |
| Body mass indexd | 24.1 (0.16) | 24.5 (0.07) | 24.5 (0.07) | 24.5 (0.03) | 24.5 (0.03) | 24.6 (0.05) |
| Calcium intake, mg/day | 711 (8.5) | 729 (5.3) | 785 (5.0) | 894 (2.3) | 1,127 (2.2) | 1,304 (3.6) |
| Vitamin D intake, IU/day | 302 (5.6) | 295 (3.5) | 318 (3.3) | 349 (1.5) | 428 (1.4) | 476 (2.3) |
| Age at menarche, years | 12.4 (0.03) | 12.4 (0.02) | 12.4 (0.02) | 12.4 (0.01) | 12.4 (0.01) | 12.5 (0.01) |
| Parity, no. of children | 1.4 (0.03) | 1.4 (0.02) | 1.5 (0.02) | 1.5 (0.01) | 1.6 (0.01) | 1.7 (0.01) |
| Physical activity, MET-hours/week | 22.3 (1.4) | 21.4 (0.9) | 22.7 (0.8) | 23.7 (0.4) | 24.8 (0.4) | 26.7 (0.6) |
| Vegetable protein intake, % of total kcal | 5.6 (0.02) | 5.3 (0.01) | 5.2 (0.01) | 5.1 (0.01) | 4.9 (0.01) | 4.6 (0.01) |
| Alcohol intake, g/day | 2.6 (0.13) | 3.0 (0.08) | 3.2 (0.08) | 3.2 (0.04) | 3.1 (0.03) | 3.3 (0.06) |
| Ever use of oral contraceptives, % | 82 | 85 | 85 | 85 | 84 | 82 |
| Current smoking, % | 17 | 15 | 14 | 12 | 10 | 12 |
Abbreviations: BMI, body mass index; MET, metabolic equivalent of task.
a All characteristics were calculated with the use of generalized linear models adjusting for the age of participants in 1991.
b All values are presented as mean (standard error) unless otherwise indicated.
c Values are presented as mean (standard deviation).
d Weight (kg)/height (m)2.