Table 2.
Cumulative Incidence of a Subsequent Oophorectomy Among the Hysterectomy Cases, Separately by Level of Ovarian Preservation
| Ovarian Preservation at the Time of Hysterectomy | Number of Patients With Subsequent Oophorectomy | Cumulative Incidence of Subsequent Oophorectomy by Years After the Index Date, %*
|
||||||
|---|---|---|---|---|---|---|---|---|
| 2 | 5 | 10 | 15 | 20 | 25 | 30 | ||
| One ovary intact (n=1,015) | 34 | 1.2 | 1.7 | 2.8 | 3.2 | 4.0 | 4.0 | 4.0 |
| Both ovaries intact (n=3,916) | 281 | 0.7 | 1.9 | 3.7 | 5.3 | 6.8 | 8.8 | 10.6 |
*
The cumulative incidence of a subsequent oophorectomy is significantly different between the 2 groups (hazard ratio, 2.15; 95% confidence interval, 1.51–3.07; P<.001; based on a Cox model fit on an age scale).