Table 3.

Association Between Veteran Status and Early Hysterectomy (Age < 40), Stratified by Birth Cohort (Age at Enrollment)

Birth cohort	Non-Veterans a		Veterans a		Model 1 b		Model 2 c
	N	%	N	%	RR (95% CI)	p value	RR (95% CI)	p value
<65 at enrollment	12,879	16.4	280	21.1	1.32 (1.19, 1.47)	<.001	1.29 (1.16, 1.44)	<.001
≥65 at enrollment	6,758	11.0	209	8.9	0.89 (0.78, 1.01)	.08	0.90 (0.79, 1.03)	.13

Notes: BMI = body mass index; BSO = bilateral salpingo-oophorectomy; CI = confidence interval; RR = relative risk.

^a Numbers and percents reflect those from Adjustment 1 models.

^b Adjusted for age (continuous), race (white, non-white), and parity (nominal).

^c Adjusted for age (continuous), race (white, non-white), parity (nominal), education (ordinal), age at menarche (nominal), BMI (continuous), pack-years of smoking (continuous), and hormone therapy use (nominal); due to additional adjustments, sample sizes are smaller than in Adjustment 1 models due to missing information.