Table 4.

Results of multiple linear regression examining associations between participant characteristics and log-transformed (base e) daily BPA index in children (n = 377).

	Daily BPA Index a
	$\mathsf{\beta }$	95% CI ( $\mathsf{\beta }$)	Percent Change b	95% CI (Percent Change)	p
Age (years)	−0.02	−0.08 to 0.03	−1.98	−7.69 to 3.05	0.37
Sex
Female	Reference
Male	0.08	−0.03 to 0.18	8.33	−2.96 to 19.72	0.14
Dietary pattern
More modern	Reference
Less modern	−0.17	−0.28 to −0.06	−15.63	−24.42 to −5.82	0.002
Maternal Education (years)	−0.02	−0.05 to 0.01	−1.98	−4.88 to 1.01	0.14
Physical Activity
More than peers	Reference
About equal to peers	0.15	−0.01 to 0.39	16.18	−1.00 to 47.70	0.07
Less than peers	0.19	0.03 to 0.27	20.92	3.05 to 31.00	0.02
Annual Household Income
<5000 talā	Reference
5000 to 9999 talā	0.06	−0.08 to 0.19	6.18	−7.69 to 20.92	0.40
≥10,000 talā	−0.29	−0.45 to −0.14	−25.17	−36.24 to −13.06	0.0003
Household Assets (total number)	−0.01	−0.02 to 0.003	−1.00	−1.98 to 0.30	0.15
Region
Apia Urban Area	Reference
Northwest Upolu	−0.07	−0.20 to 0.06	−6.76	−18.13 to 6.18	0.27
Rest of Upolu	−0.04	−0.18 to 0.09	−3.92	−16.47 to 9.42	0.51

BPA, Bisphenol A; ^a daily BPA index as computed in Equation (1) and natural log-transformed; $\mathsf{\beta }$, unstandardized regression coefficient estimate; CI, confidence interval; ^b percent change = [exp($\mathsf{\beta }$) − 1] × 100; p, p-value based on the t-test for the particular adjusted regression coefficient; MVPA, daily moderate to vigorous physical activity minutes; R², 14.2; all variance inflation factors < 1.2.