Table 3. Regression coefficients for change in log benzophenone-3 concentrations according to frequency of sunscreen use, stratified by ethnicity (n=4412).

Frequency of sunscreen use	Ethnicity
	White non-Hispanic	Black non-Hispanic	Mexican American	Other Hispanic	Other race, multi-racial
Never	ref	ref	ref	ref	Ref
Rarely	0.2 (-0.1-0.5)	0.3 (-0.2-0.9)	0.5 (0.0-0.9)	0.2 (-0.2-0.7)	0.4 (-0.2-1.0)
Sometimes	0.9 (0.6-1.2)	0.5 (0.1-0.9)	0.7 (0.4-1.0)	1.2 (0.7-1.6)	1.6 (0.9-2.3)
Most of the time	1.5 (1.2-1.9)	1.4 (0.7-2.1)	1.8 (1.0-2.6)	1.6 (0.8-2.5)	2.2 (1.6-2.8)
Always	2.0 (1.6-2.4)	1.9 (1.1-2.7)	1.8 (1.1-2.5)	2.1 (1.3-2.9)	1.9 (1.1-2.9)
P-trend	<0.01	<0.01	<0.01	<0.01	<0.01
Model R2	0.23	0.15	0.27	0.28	0.43
Sunscreen R2	0.08	0.06	0.07	0.13	0.13

Adjusted for age, sex, BMI, education, sun avoidance