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. Author manuscript; available in PMC: 2021 May 23.
Published in final edited form as: J Expo Sci Environ Epidemiol. 2020 Sep 26;31(3):461–475. doi: 10.1038/s41370-020-00270-9

Table 1.

Distribution of selected correlates at baseline among SELF study participants (n=754)

Correlate N (%)
Age at enrollment (years)
 23–25 184 (24.4)
 26–28 187 (24.8)
 29–31 200 (26.5)
 32–35 183 (24.3)
Educational attainment
 <High school 47 (6.2)
 High school/GED 117 (15.5)
 Some college/Associate’s/Technical degree 381 (50.5)
 Bachelor’s degree 147 (19.5)
 Advanced degree 62 (8.2)
Annual household income
 <$20,000 342 (45.4)
 $20,000–$50,000 284 (37.7)
 >$50,000 128 (17.0)
Body mass index (kg/m2)
 <25 142 (18.8)
 25–29 157 (20.8)
 30–34 151 (20.0)
 35–39 127 (16.8)
 ≥40 177 (23.5)
Cigarette smoking
 Never 553 (73.3)
 Former 58 (7.7)
 Current 143 (19.0)
Alcohol intake (drinks/week)
 0 204 (27.1)
 1–6 421 (55.8)
 7–13 69 (9.2)
 ≥14 60 (8.0)
Parity
 Nulliparous 285 (37.8)
 1 birth 205 (27.2)
 2 births 129 (17.1)
 ≥3 births 135 (17.9)
Current contraception use
 Oral contraceptive pills 86 (11.4)
 Intrauterine device (hormonal + non-hormonal) 82 (10.9)
 Depo medroxyprogesterone acetate 47 (6.2)
 Vaginal ring 12 (1.6)
 Hormonal implant 3 (0.4)
 Hormonal patch 2 (0.3)
Exposures to genital area in past 24 hours
 Powder 97 (12.9)
 Douching 18 (2.4)
 Feminine hygiene deodorant 75 (10.0)
 Condoms 36 (4.8)
Hair product use in past 24 hours
 Hairspray, gel, oil, or mousse 252 (33.4)
 Chemical hair treatments 17 (2.3)
Nail product use in past 24 hours
 Nail polish 79 (10.5)
 Solvents 79 (10.5)
Other personal care product use in past 24 hours
 Perfume or cologne 489 (64.9)
 Creams or lotions 260 (34.5)
 Makeup 557 (73.9)

GED=General Educational Development; SELF=Study of the Environment, Lifestyle and Fibroids