Table 1.
Characteristics of the Participants by Follow-up Year
| Women | Men | |||||
|---|---|---|---|---|---|---|
| Year | Baseline | 5 | 10 | Baseline | 5 | 10 |
| No. | 465 | 1013 | 1337 | 185 | 439 | 577 |
| Percentage by sex per year | ||||||
| Summer | 51.4% | 53.7% | 56.8% | 51.9% | 50.8% | 51.3% |
| Quebec | 100.0% | 47.0% | 24.0% | 100.0% | 48.3% | 23.2% |
| Age (years) | ||||||
| 25–50 | 17.6% | 9.5% | 6.6% | 26.5% | 14.1% | 10.6% |
| 51–70 | 61.3% | 51.9% | 51.0% | 48.7% | 49.4% | 49.0% |
| >70 | 21.1% | 38.6% | 42.4% | 24.8% | 36.5% | 40.4% |
| Sun exposure | ||||||
| Never | 86.2% | 53.0% | 45.2% | 76.8% | 36.9% | 35.4% |
| Seldom | 11.8% | 31.6% | 29.4% | 20.0% | 44.2% | 31.9% |
| Regular/often | 2.0% | 15.4% | 25.4% | 3.2% | 18.9% | 32.6% |
| Regular activity | 48.8% | 42.1% | 54.8% | 46.0% | 42.6% | 53.5% |
| Antiresorptive use | 30.5% | 48.5% | 35.4% | 0.0% | 5.2% | 7.3% |
| Mean (SD) | ||||||
| PTH (pg/mL) | 70.8 (35.6) | 72.6 (34.6) | 62.0 (27.9) | 67.7 (28.2) | 72.7 (32.5) | 63.7 (34.5) |
| 25(OH)D (nmol/L) | 59.5 (20.7) | 64.4 (23.2) | 70.7 (24.7) | 64.7 (23.2) | 67.0 (23.7) | 69.9 (25.0) |
| Vitamin D supplement (IU/day) | 118 (688) | 243 (330) | 522 (934) | 38 (134) | 96 (206) | 273 (742) |
| Vitamin D from milk +beverages (IU/day) | 103 (128) | 109 (111) | 112 (115) | 108 (123) | 126 (155) | 114 (128) |
| Calcium supplement (mg/day) | 180 (314) | 424 (463) | 516 (505) | 48 (206) | 117 (250) | 217 (363) |
| Dietary calcium (mg/day) | 762 (463) | 828 (473) | 866 (518) | 721 (403) | 855 (609) | 825 (513) |
| BMI (kg/m2) | 26.2 (4.9) | 27.2 (5.4) | 27.2 (5.5) | 26.4 (3.7) | 27.3 (3.9) | 27.6 (4.9) |