Table 1.
Background characteristics of participants (n = 55)
| Age, years, mean (range) |
28 (19–48) |
| Gender, n (%) women |
35 (63.6) |
| Body mass index, kg/m2, mean (SD) |
23.7 (3.8) |
| Daily use of vitamin D-containing butter or margarine on bread or in cooking, n (%) |
25 (45.5) |
| Regular consumption of vitamin D enriched milk, n (%) |
14 (25.5) |
| Intake of fatty fish at least twice a week, n (%) |
32 (58.2) |
| Habitual use of dietary supplements other than vitamin D, n (%) |
7 (12.7) |
| Common use of sunscreen on sunny days, n (%) |
18 (32.7) |
| Exposes skin to direct sunlight > 10 minutes on sunny days, n (%) |
49 (89.1) |
| Spends on average more than 2 hours outdoors during a sunny week, n (%) | 36 (65.5) |