Table 2.
Characteristics according to total dairy consumption (g/day) in the Norwegian Women and Cancer study (n = 64,904)
| Characteristics | Total dairy consumption (g/day) | |||
|---|---|---|---|---|
| 1st quartile (<92) | 2nd quartile (92–173) | 3rd quartile (174–369) | 4th quartile (≥370) | |
| Age, years (mean) | 50.5 | 51.0 | 51.3 | 51.3 |
| Height, cm (mean) | 166 | 166 | 166 | 166 |
| Body mass index, kg/m2 (mean) | 24.6 | 24.7 | 24.5 | 24.6 |
| Weight increase since age 18 years, kg (mean) | 10.4 | 10.3 | 9.9 | 10.1 |
| Physical activity score (min 1–max 10, mean) | 5.3 | 5.4 | 5.6 | 5.5 |
| Current smokers (%) | 35.4 | 32.1 | 25.7 | 33.8 |
| Education, years (mean) | 11.4 | 11.7 | 12.1 | 11.6 |
| Maternal history of breast cancer (%) | 5.7 | 5.9 | 6.2 | 5.6 |
| Mammography regularly (%) | 37.6 | 38.1 | 41.4 | 36.4 |
| Age at menarche, years (mean) | 13.3 | 13.3 | 13.3 | 13.4 |
| Nulliparous (%) | 8.4 | 8.5 | 8.2 | 8.2 |
| No. of children, parous women only (mean) | 2.5 | 2.5 | 2.6 | 2.6 |
| Age at first birth, parous women only, years (mean) | 23.4 | 23.7 | 24.1 | 23.8 |
| Postmenopausal (%) | 54.2 | 56.5 | 58.3 | 56.6 |
| Ever use of HRT, postmenopausal women only (%) | 43.8 | 43.7 | 42.8 | 40.8 |
| Ever use of oral contraceptives (%) | 56.1 | 54.1 | 53.1 | 51.8 |
| Energy intake, kJ/day (median) | 5,911 | 6,368 | 7,011 | 7,392 |
| Fat intake, g/day (median) | 54 | 58 | 63 | 66 |
| Alcohol intake, g/day (median) | 1.5 | 1.5 | 1.6 | 1.2 |
| Calcium intake, mg/day (median) | 435 | 565 | 715 | 911 |
| Vitamin D intake, μg/day (median) | 5.6 | 6.2 | 7.2 | 7.7 |
| Fruit, vegetable, and potato intake, g/day (median) | 373 | 390 | 420 | 402 |
| Use of cod liver oil (%) | 31 | 39 | 45 | 47 |
At the time of filling in the questionnaire