Table 2.

Multivariate linear regression β coefficient (95% CI)^a association between BMI z-score, waist circumference, and quartile^b of ∑molPAHs, or ∑NAPHT.

Exposure	BMI z-score		Waist circumference
	β coefficient (95% CI)	p-Value	β coefficient (95% CI)	p-Value
ALL (6–19 years)	n = 3,189		n = 3,189
∑molPAHs Q1	Referent		Referent
∑molPAHs Q2	0.18 (0.04, 0.32)	0.01	1.37 (–0.11, 2.85)	0.07
∑molPAHs Q3	0.18 (0.01, 0.35)	0.04	1.34 (–0.28, 2.96)	0.10
∑molPAHs Q4	0.25 (0.08, 0.43)	0.01	2.24 (0.25, 4.23)	0.03
∑NAPHT Q1	Referent		Referent
∑NAPHT Q2	0.22 (0.06, 0.39)	0.01	1.79 (0.15, 3.43)	0.03
∑NAPHT Q3	0.24 (0.08, 0.40)	< 0.01	1.78 (0.24, 3.32)	0.02
∑NAPHT Q4	0.31 (0.15,0.50)	< 0.01	2.68 (0.88, 4.49)	< 0.01
Children (6–11 years)	n = 1,081		n = 1,081
∑molPAHs Q1	Referent		Referent
∑molPAHs Q2	0.20 (–0.04, 0.44)	0.09	1.08 (–0.85, 3.00)	0.27
∑molPAHs Q3	0.24 (–0.02, 0.49)	0.07	1.36 (–0.83, 3.56)	0.22
∑molPAHs Q4	0.41 (0.04, 0.77)	0.03	3.30 (0.24, 6.35)	0.03
∑NAPHT Q1	Referent		Referent
∑NAPHT Q2	0.25 (–0.03, 0.52)	0.07	1.56 (–0.68, 3.80)	0.17
∑NAPHT Q3	0.31 (0.04, 0.56)	0.02	1.95 (–0.44, 4.34)	0.11
∑NAPHT Q4	0.37 (0.03, 0.70)	0.03	3.07 (0.19, 5.96)	0.04
Adolescents (12–19 years)	n = 2,108		n = 2,108
∑molPAHs Q1	Referent		Referent
∑molPAHs Q2	0.20 (0.01, 0.39)	0.04	2.37 (–0.07, 4.82)	0.06
∑molPAHs Q3	0.12 (–0.14, 0.38)	0.35	2.01 (–1.16, 5.17)	0.21
∑molPAHs Q4	0.18 (–0.06, 0.43)	0.13	2.65 (–0.16, 5.45)	0.06
∑NAPHT Q1	Referent		Referent
∑NAPHT Q2	0.24 (0.04, 0.45)	0.02	2.83 (0.35, 5.31)	0.03
∑NAPHT Q3	0.21 (–0.01, 0.45)	0.08	2.53 (–0.07, 5.12)	0.06
∑NAPHT Q4	0.32 (0.07, 0.59)	0.02	3.66 (1.15, 6.17)	0.01
aAdjusted for age, race/ethnicity, sex, urinary creatinine, PIR, serum cotinine, serum C-reactive protein, calorie intake, and television, video game, and computer usage. bQuartiles (Q) ∑molPAHs (nmol/L): Q1: ≤ 19.90; Q2: 19.91–34.89; Q3: 34.90–64.48; Q4: > 64.48. Quartiles ∑NAPHT (ng/L): Q1: ≤ 2404.34; Q2: 2404.35–4259.03; Q3: 4259.04–8256.64; Q4: > 8256.64.