Table 1.
Age-standardized baseline characteristics by quintile of the predicted 25(OH)D score* among 42 730 men participating in the Health Professionals Follow-up Study, USA, 1986–2006
| Q1 | Q3 | Q5 | ||||
|---|---|---|---|---|---|---|
| Mean or % | sd | Mean or % | sd | Mean or % | sd | |
| % | 20 | – | 20 | 20 | ||
| n | 8513 | 8308 | 8704 | |||
| Age (years) | 54 | 9·6 | 54 | 9·7 | 54 | 9·8 |
| Race (%) | ||||||
| Caucasian | 87 | – | 96 | – | 97 | – |
| African American | 4 | – | 0·1 | – | – | – |
| Asian | 6 | – | 0·9 | – | 0·1 | – |
| BMI (kg/m2) | 27·2 | 3·6 | 25·5 | 3·2 | 23·7 | 2·4 |
| Smokers (%) | ||||||
| Never | 45 | – | 48 | – | 52 | – |
| Current | 12 | – | 9 | – | 6 | – |
| Former | 43 | – | 43 | – | 42 | – |
| Diabetes (%) | 4 | – | 3 | – | 3 | – |
| Alcohol (g/d) | 11·7 | 17·0 | 11·3 | 15·4 | 11·0 | 13·9 |
| Physical activity (MET/week) | 5·0 | 7·6 | 18·4 | 22·5 | 42·4 | 38·9 |
| Dentist (%) | 53 | – | 58 | – | 65 | – |
| Married (%) | 91 | – | 91 | – | 88 | – |
| Region (%) | ||||||
| Northeast/Mid-Atlantic | 26 | – | 23 | – | 16 | – |
| South/Southwest | 36 | – | 42 | – | 59 | – |
| Midwest/Pacific Northwest | 37 | – | 35 | – | 24 | – |
| Periodontitis (%)† | 17 | – | 16 | – | 14 | – |
| Number of teeth (%) | ||||||
| 25–32 | 81 | – | 84 | – | 87 | – |
| 17–24 | 13 | – | 12 | – | 10 | – |
| 11–16 | 3 | – | 2 | – | 2 | – |
| 1–10 | 2 | – | 2 | – | 1 | – |
| Vitamin D from food (μg/d) | 4·53 | 2·55 | 6·48 | 3·55 | 8·45 | 4·05 |
| Vitamin D from supplements (μg/d) | 1·70 | 4·5 | 3·53 | 6·20 | 5·43 | 7·05 |
25(OH)D, 25-hydroxyvitamin D, Q1, lowest quintile; Q3, middle quintile; Q5, highest quintile; MET, metabolic equivalents.
*
Values are standardized to the age distribution of the study population. Percentages may not sum to 100 % due to rounding.
†
Men with periodontitis at baseline were excluded from the incident periodontitis analysis.