Table 1.

Description of study variables.

Category of Variable	Variable Name	Type of Variable	Description
Response variable	Total serum testosterone (ng/dL)	Continuous	Lab values
Main predictor variable	Urinary triclosan (ng/mL)	Continuous	Lab values
Covariates	Race	Categorical	Black, White (reference), Asian, Mexican-American/Hispanic/Other
	Body mass index (kg/m2)	Continuous	Lab values
	Annual income	Categorical	Low income (≤ 25th percentile),
			Middle income (25th–75th percentile)
			High income (≥ 75th percentile)
	Cotinine levels (ng/mL) (as a proxy for smoking status)	Binary	Non-smoker (lower than 10 ng/mL)
			Smoker (10 ng/mL or greater)
	Creatinine levels (mg/dL)	Continuous	Lab values