Table 1.
Characteristics of Women in the Million Women Study According to Walking, Housework, Gardening, and Cycling, Reported at 3‐Year Resurvey
| Walking | Housework | Gardening | Cycling | ||||||
|---|---|---|---|---|---|---|---|---|---|
| Characteristic | Up to 1 hour per week (n = 83,505) | More than 1 hour per week (n = 287,774) | Up to 5 hours per week (n = 84,134) | More than 5 hours per week (n = 287,145) | Up to 1 hour per week (n = 136,588) | More than 1 hour per week (n = 234,691) | Up to 1 hours per week (n = 347,155) | More than 1 hour per week (n = 24,124) | All women (n = 371,279) |
| Characteristics at baseline | |||||||||
| Age at recruitment (years), mean ± SD | 59.5 ± 4.8 | 59.9 ± 4.8 | 59.5 ± 4.8 | 59.9 ± 4.8 | 59.5 ± 4.8 | 60.0 ± 4.8 | 59.9 ± 4.8 | 59.1 ± 4.5 | 59.8 ± 4.8 |
| Height (cm), mean ± SD | 162.1 ± 6.5 | 162.5 ± 6.4 | 162.7 ± 6.5 | 162.3 ± 6.4 | 162.1 ± 6.4 | 162.6 ± 6.4 | 162.4 ± 6.4 | 162.8 ± 6.4 | 162.4 ± 6.4 |
| Weight (kg), mean ± SD | 69.0 ± 12.3 | 67.2 ± 11.0 | 68.0 ± 11.5 | 67.5 ± 11.2 | 68.2 ± 11.8 | 67.3 ± 11.0 | 67.7 ± 11.4 | 66.5 ± 10.4 | 67.6 ± 11.3 |
| BMI (kg/m2), mean ± SD | 26.2 ± 4.5 | 25.5 ± 4.0 | 25.7 ± 4.2 | 25.6 ± 4.1 | 25.9 ± 4.3 | 25.5 ± 4.0 | 25.7 ± 4.1 | 25.1 ± 3.8 | 25.6 ± 4.1 |
| Alcohol (g/day), mean ± SD | 7.0 ± 8.6 | 7.2 ± 8.4 | 7.4 ± 8.6 | 7.0 ± 8.4 | 7.0 ± 8.6 | 7.2 ± 8.4 | 7.1 ± 8.5 | 7.1 ± 8.2 | 7.1 ± 8.5 |
| Current smoker (%) | 13.0 | 9.5 | 9.1 | 10.7 | 10.3 | 10.3 | 10.5 | 7.3 | 10.3 |
| Never smoker (%) | 53.0 | 57.4 | 55.7 | 56.6 | 55.2 | 57.1 | 56.3 | 57.4 | 56.4 |
| Deprivation: lowest fifth (%) | 14.5 | 13.4 | 13.8 | 13.6 | 17.5 | 11.4 | 13.8 | 11.8 | 13.7 |
| Never users of HRT (%) | 45.2 | 47.3 | 44.7 | 47.4 | 46.6 | 46.9 | 46.7 | 48.5 | 46.8 |
| No diabetes (%) | 98.2 | 98.4 | 98.3 | 98.4 | 98.1 | 98.5 | 98.3 | 98.9 | 98.4 |
| No qualifications (%) | 35.2 | 29.9 | 25.8 | 32.6 | 33.8 | 29.5 | 31.1 | 30.6 | 31.1 |
| Follow‐up for fracture incidence | |||||||||
| Woman‐years of follow‐up (in millions) | 1.0 | 3.4 | 1.0 | 3.4 | 1.6 | 2.8 | 4.1 | 0.3 | 4.4 |
| Incident wrist fractures, n | 1532 | 5826 | 1693 | 5665 | 2732 | 4626 | 6851 | 507 | 7358 |
| Incident forearm (not wrist) fractures, n | 260 | 978 | 294 | 944 | 517 | 721 | 1136 | 102 | 1238 |
| Incident humerus fractures, n | 526 | 1815 | 549 | 1792 | 963 | 1378 | 2190 | 151 | 2341 |
| Incident upper limb fracture, n | 2217 | 8275 | 2423 | 8069 | 4021 | 6471 | 9760 | 732 | 10,492 |
| Incident hip fractures, n | 1094 | 3260 | 952 | 3402 | 1621 | 2733 | 4123 | 231 | 4354 |
| Incident femur (not neck) fractures, n | 174 | 443 | 147 | 470 | 241 | 376 | 580 | 37 | 617 |
| Incident lower leg fractures, n | 288 | 896 | 295 | 889 | 450 | 734 | 1098 | 86 | 1184 |
| Incident ankle fractures, n | 783 | 2846 | 903 | 2726 | 1373 | 2256 | 3403 | 226 | 3629 |
| Incident lower limb fracture, n | 2234 | 7172 | 2195 | 7211 | 3545 | 5861 | 8847 | 559 | 9406 |
BMI = Body mass index; g = grams; HRT = hormone replacement therapy.
Women with missing values were excluded when calculating the means or percentages for that given variable. An average of 12 years follow‐up per woman. Restricted to women reporting that they were in good or excellent health.