Table 2. Associations between categorical variables and DNA methylation at baseline.

Variable	No		Yes
	N	DNA methylation	N	DNA methylation	P-value
Ever use of postmenopausal hormonesa	100	72.3 ± 0.2	73	72.5 ± 0.2	0.53
Ever smoke (100+ cigarettes)b	92	72.7 ± 0.2	81	72.3 ± 0.3	0.18
Ever use of birth control pills	66	72.5 ± 0.2	106	72.4 ± 0.3	0.71
First-degree relative with cancer	67	72.4 ± 0.2	100	72.4 ± 0.2	0.99
Multivitamin use (≥ 1 time/wk)c	54	72.4 ± 0.3	57	72.4 ± 0.3	0.91

^a Former users of postmenopausal hormones, as current users were excluded. ^bFormer smokers, as current smokers were excluded. ^cMultivitamin use ≥ 1 time/wk during the past 3 mo, assessed among a subset of study participants who participated in the Immune Exercise (IMEX) study.