Table 3.

Results of multiple linear regression examining associations between participant characteristics and log-transformed (base e) daily BPA index in mothers (n = 351).

	Daily BPA Index a
	$\mathsf{\beta }$	95% CI ( $\mathsf{\beta }$)	Percent Change b	95% CI (Percent Change)	p
Age (years)	−0.001	−0.01 to 0.01	−0.10	−1.00 to 1.01	0.72
Maternal Education (Years)	−0.01	−0.04 to 0.02	−1.00	−3.92 to 2.02	0.50
Physical Activity
>0 MVPA Minutes	Reference
0 MVPA Minutes	−0.21	−0.33 to −0.10	−18.94	−28.11 to −9.52	0.0004
Annual Household Income
<5000 talā	Reference
5000 to 9999 talā	0.01	−0.11 to 0.14	1.01	−10.42 to 15.03	0.81
≥10,000 talā	−0.33	−0.47 to −0.19	−28.11	−37.50 to −17.30	0.00001
Household Assets (total number)	0.003	−0.01 to 0.02	0.30	−1.00 to 2.02	0.64
Region
Apia Urban Area	Reference
Northwest Upolu	0.003	−0.12 to 0.13	0.30	−11.31 to 13.88	0.97
Rest of Upolu	0.04	−0.08 to 0.17	4.08	−7.69 to 18.53	0.50

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, 11.5%; all variance inflation factors < 1.2.