Table 3.

Association between demographic factors and concentration of urinary analytes (µg/L)

Variable	TCS (µg/L)			MTCS (µg/L)			TCC (µg/L)			2,4-DCP (µg/L)
	Total	Girls	Boys	Total	Girls	Boys	Total	Girls	Boys	Total	Girls	Boys
	β	β	β	β	β	β	β	β	β	β	β	β
Age groups
6–11 years	Ref	-	-	Ref	-	-	Ref	-	-	Ref	-	-
12–18 years	− 0.40	− 0.84	0.12	− 0.34	− 0.65	− 0.02	− 0.32	− 0.39	− 0.35	− 0.05	− 0.05	− 0.04
Smoker family
Nonsmokers	Ref	-	-	Ref	-	-	Ref	-	-	Ref	-	-
Smokers	− 0.72	− 1.35	− 0.20	− 0.45	0.98*	− 0.05	− 0.30	− 1.54	0.54	− 0.03	− 0.07	0.007
Father’s education
Illiterate	Ref	-	-	Ref	-	-	Ref	-	-	Ref	-	-
Nonacademic	0.88	0.37	1.30*	0.02	− 0.14	0.15	0.06	0.19	− 0.04	0.01	− 0.04	0.05
Academic	1.10	0.27	1.80*	0.21	0.02	0.36	0.17	0.66	− 0.27	0.003	− 0.09	0.08
Mother’s education
Illiterate	Ref	-	-	Ref	-	-	Ref	-	-	Ref	-	-
Nonacademic	0.41	− 0.48	1.54*	− 0.15	− 0.38	0.15	− 0.70	− 0.26	− 1.33	− 0.01	− 0.07	0.08
Academic	2.03*	1.96	2.27*	0.25	0.24	0.30	0.007	0.51	− 0.66	− 0.03	− 0.15	0.11
Household income (US $/month)
≥ 599	Ref	-	-	Ref	-	-	Ref	-	-	Ref	-	-
≤ 600	0.17	0.42	− 0.05	− 0.007	− 0.06	0.01	− 0.74	0.13	− 1.42*	− 0.009	− 0.05	0.02
Physical activitya
Low	Ref	-	-	Ref	-	-	Ref	-	-	Ref	-	-
Moderate	0.58	0.74	0.15	0.03	0.12	− 0.09	− 0.48	− 0.48	− 0.49	− 0.03	− 0.07	0.02
High	0.27	0.23	0.34	− 0.01	0.43	− 0.20	− 0.45	− 0.71	− 0.36	− 0.02	− 0.06	− 0.03

^aPhysical activity: low = less than 5 min, moderate = 5 to 30 min, high = more than 30 min

*p-value ≤ 0.05