Table 3. Adjusted odds ratios and 95% confidence interval of use of hair products with high concentrations of urine benzophenone-3.

Use of hair products	Total (n = 3,796)		Men (n = 1,780)		Women (n = 2,016)
	Unadjusted	Adjusteda	Unadjusted	Adjustedb	Unadjusted	Adjustedb
No use	1.00	1.00	1.00	1.00	1.00	1.00
< 6 times a week	1.51 (1.43–1.59)	1.06 (1.01–1.12)	1.08 (0.97–1.20)	1.03 (0.95–1.10)	1.41 (1.28–1.56)	1.24 (1.12–1.38)
≥ 6 times a week	1.55 (1.41–1.70)	1.00 (0.90–1.11)	0.85 (0.66–1.10)	0.74 (0.55–1.01)	1.87 (1.55–2.25)	1.54 (1.33–1.79)

The 75th percentile concentration of urine benzophenone-3 (Total: ≥ 1.73 μg/g Cr, Men: ≥ 1.06 μg/g Cr, Women: ≥ 2.51 μg/g Cr).

BMI: body mass index; UV: ultraviolet; PET: polyethylene terephthalate.

^aAdjusted for age, gender, smoking, BMI, use of perfume, hair products, body-cleansing products, make-up, manicure, antimicrobial, fragrance, UV filter within 3 months, drinking from PET bottle, drinking from plastic bag, use of clear plastic container for storing cooked food, use of clear plastic container for storing boiling water, consumption of crustacean, fish, seaweed, shellfish, and other seafood.

^bAdjusted for age, smoking, BMI, use of perfume, hair products, body-cleansing products, make-up, manicure, antimicrobial, fragrance, UV filter within 3 months, drinking from PET bottle, drinking from plastic bag, use of clear plastic container for storing cooked food, use of clear plastic container for storing boiling water, consumption of crustacean, fish, seaweed, shellfish, and other seafood.