Table 2.
Crude and Age-adjusted Incident Fracture Rates in N = 145,521 WHI Participants, by Veteran Status
| Events | Total PY | Crude rate (per 1,000 PY) | Age-standardized estimates | ||
|---|---|---|---|---|---|
| Rateb (per 1,000 PY) | 95% CI | ||||
| Veterans | |||||
| Hip fracturea | 223 | 47,277.3 | 4.72 | 3.25 | 2.75–3.76 |
| Central body fracture, incl. hipa | 526 | 45,619.3 | 11.53 | 8.51 | 7.66–9.37 |
| Central body fracture, excl. hip | 350 | 48,214.6 | 7.26 | 5.52 | 4.83–6.20 |
| Upper limb fracture | 486 | 44,971.1 | 10.81 | 9.64 | 8.65–10.63 |
| Lower limb fracture | 456 | 45,297.5 | 10.07 | 9.79 | 8.77–10.81 |
| Non-Veterans | |||||
| Hip fracturea | 4,476 | 18,98,638.7 | 2.36 | 2.40 | 2.33–2.47 |
| Central body fracture, incl. hipa | 13,308 | 18,51,552.9 | 7.19 | 7.30 | 7.18–7.43 |
| Central body fracture, excl. hip | 9,801 | 19,18,281.4 | 5.11 | 5.14 | 5.04–5.24 |
| Upper limb fracture | 16,688 | 18,06,252.6 | 9.24 | 9.28 | 9.14–9.42 |
| Lower limb fracture | 17,319 | 17,97,291.1 | 9.64 | 9.64 | 9.49–9.78 |
Notes: CI = confidence interval; PY = person-years; WHI = Women’s Health Initiative.
a p Value for rate difference <.01.
bStandard population is whole WHI population, in age decades.