Table 5. Risk of other bone fractures in women with hysterectomy compared with the comparison group stratified by follow-up year.
| Comparison group | Hysterectomy | Crude | Adjusted* | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Follow time | N | Event | PY | IR | N | Event | PY | IR | HR (95% CI) | p-value | HR (95% CI) | p-value |
| <5 | 32602 | 299 | 148499 | 2.01 | 8643 | 283 | 39044 | 7.25 | 3.69 (3.13,4.34) | <0.001 | 3.61 (3.06,4.25) | <0.001 |
| 5–9 | 32303 | 159 | 114049 | 1.39 | 8360 | 154 | 30847 | 4.99 | 3.76 (3.01,4.7) | <0.001 | 3.68 (2.95,4.60) | <0.001 |
| ≧9 | 32144 | 69 | 138354 | 0.50 | 8206 | 66 | 38228 | 1.73 | 3.73 (2.66,5.22) | <0.001 | 3.69 (2.63,5.17) | <0.001 |
PY: Person-years; IR: Incidence rate per 1,000 person-years; HR: Hazard ratio; CI: Confidence interval.
*: Model was adjusted for age, urbanization, insurance premium, occupation, estrogen treatment, and Charlson comorbidity index.