Table 2.

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

Birth cohort	Non-Veterans a		Veterans a		Model 1 b		Model 2 c
	N	%	N	%	OR (95% CI)	p value	OR (95% CI)	p value
<65 at enrollment
None d	46,867	60.4	737	56.3	1.00	—	1.00	—
Hysterectomy without BSO	16,221	20.9	281	21.5	1.18 (1.03, 1.36)	.02	1.18 (1.02, 1.37)	.03
Hysterectomy with BSO	14,544	18.7	292	22.3	1.26 (1.10, 1.45)	<.001	1.28 (1.10, 1.48)	.001
≥65 at enrollment
None d	34,607	57.9	1,320	57.7	1.00	—	1.00	—
Hysterectomy without BSO	12,558	21.0	496	21.7	1.07 (0.97, 1.20)	.19	1.09 (0.97, 1.22)	.15
Hysterectomy with BSO	12,582	21.1	470	20.6	0.98 (0.88, 1.10)	.76	0.97 (0.87, 1.10)	.67

Notes: BMI = body mass index; BSO = bilateral salpingo-oophorectomy; CI = confidence interval; OR = odds ratio.

^a Numbers and percents reflect those from Model 1.

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

^d Including women without hysterectomy but with partial, unilateral, or bilateral oophorectomy or unknown number of ovaries removed.