Table 3.

Predicted and Observed Rates of Amenorrhea After GEA

Preoperative Risk Factorsa					Observed Rates of Amenorrhea in the Validation Cohort, % (No. at Risk)c
GEA Procedure	Age ≥45 y	Uterine Length <9 cm	Endometrial Thickness <4 mm	Predicted Rate of Amenorrhea (95% CI)b
RFA	Yes	Yes	Yes	71% (50%–86%)
RFA	Yes	No	Yes	57% (36%–76%)
RFA	No	Yes	Yes	49% (29%–68%)
RFA	Yes	Yes	No	47% (34%–61%)	58% (12)
RFA	No	No	Yes	34% (18%–54%)
RFA	Yes	No	No	33% (24%–43%)	32% (31)
RFA	No	Yes	No	26% (17%–37%)	56% (18)
RFA	No	No	No	16% (10%–24%)	39% (38)
TBA	Yes	Yes	Yes	46% (24%–70%)
TBA	Yes	No	Yes	32% (15%–55%)
TBA	No	Yes	Yes	25% (12%–45%)
TBA	Yes	Yes	No	24% (14%–38%)
TBA	No	No	Yes	15% (7%–32%)
TBA	Yes	No	No	15% (9%–23%)	0% (16)
TBA	No	Yes	No	11% (6%–19%)
TBA	No	No	No	6% (3%–11%)	7% (14)

Abbreviations: CI, confidence interval; GEA, global endometrial ablation; RFA, radiofrequency ablation; TBA, thermal balloon ablation.

^aRisk factors were significant in the adjusted analysis (final model).

^bRates were derived from the final model that was fit using the model development cohort.

^cOnly results for variables with data from 10 or more women in the model validation cohort are presented.