Table 1.
Selected baseline characteristics of the participants included in the study, categorized by daily household activity level (for example, gardening, household activities and commuting hours per week)
| Variable | Daily household activities (h/week) | |||||
|---|---|---|---|---|---|---|
| <1 | 1–2 | 3–4 | 5–6 | ≥6 | ||
| Number of participants | Total 23,881 | 356 | 2653 | 6610 | 5395 | 8712 |
| Age (years, mean, SD) | 63.1 (8.3) | 62.2 (9.3) | 61.7 (8.5) | 62.3 (8.4) | 63.4 (8.4) | 64.0 (8.0) |
| Gender (% men) | 39.8 | 53.9 | 47.3 | 39.3 | 35.9 | 39.8 |
| Height (cm), mean (SD) | 169.5 (8.7) | 171.5 (9.3) | 170.8 (9.0) | 169.6 (8.8) | 169.0 (8.5) | 169.3 (8.7) |
| Weight (kg), mean (SD) | 72.4 (12.1) | 78.3 (13.7) | 75.5 (13.0) | 73.1 (12.0) | 71.4 (11.7) | 71.3 (11.8) |
| Body mass index (kg/m2), mean (SD) | 25.1 (3.4) | 26.5 (3.9) | 25.8 (3.8) | 25.3 (3.4) | 24.9 (3.2) | 24.8 (3.2) |
| Waist circumference (cm), mean (SD) | 86.9 (11.8) | 93.3 (12.4) | 89.9 (12.4) | 87.5 (11.8) | 86.1 (11.6) | 86.0 (11.4) |
| Current smoking (%) | 5.3 | 10.6 | 7.8 | 6.1 | 4.7 | 5.7 |
| Alcohol (g/month), mean (SD) | 295.2 (592.2) | 310.2 (428.8) | 357.7 (1360.9) | 299.2 (399.6) | 274.7 (367.4) | 287.0 (426.8) |
| Education (≥13 years, %) | 29.3 | 32.3 | 34.3 | 32.4 | 31.3 | 25.2 |
| Energy intake (kJ/day), mean (SD) | 8784.3 (2661.8) | 8299.3 (2748.8) | 8469.9 (2764.6) | 8571.3 (2622.6) | 8779.6 (2507.9) | 9079.5 (2713.4) |
| Calcium intake (mg/day), mean (SD) | 1200.2 (460.6) | 1095.6 (487.4) | 1143.1 (488.3) | 1169.3 (444.2) | 1210.5 (448.9) | 1239.6 (464.5) |
| Hormonal replacement therapya (%) | 43.4 | 45.3 | 45.3 | 46.9 | 45.3 | 42.8 |
| Vitamin D intake (μg/day), mean (SD) | 4.3 (2.2) | 4.1 (2.2) | 4.1 (2.4) | 4.2 (2.2) | 4.4 (2.1) | 4.5 (2.3) |
| Diabetes (%) | 3.5 | 6.8 | 5.0 | 3.8 | 3.2 | 2.9 |
| Charlson comorbidity index, mean (SD) | 0.3 (0.8) | 0.6 (1.3) | 0.3 (0.9) | 0.3 (0.8) | 0.3 (0.8) | 0.3 (0.8) |
| Osteoarthritis (%) | 2.6 | 5.1 | 3.1 | 2.2 | 2.4 | 2.6 |
| Leisure time physical activity (METh/day), mean (SD) | 2.3 (1.9) | 0.8 (1.2) | 1.3 (1.3) | 1.8 (1.4) | 2.3 (1.6) | 3.1 (2.3) |
The Swedish National March Cohort
aFemales only