Table 3.

Mixed-effects model results for multilevel spline model.

Table 3. Mixed-effects model results for multilevel spline model.
Analyte		Intervention variable		Percent change in GM per time period (ng/mL)a		95% CI for slope estimate
BPA		Pre vs. duringb		–66% (3.7 vs. 1.2)		–1.6 to –0.55**
		During vs. post		202% (1.2 vs. 3.8)		0.61 to 1.6**
MEHP		Pre vs. during		–53% (7.1 vs. 3.4)		–1.2 to –0.16*
		During vs. post		21% (3.4 vs. 4.1)		–0.32 to 0.74
MEOHP		Pre vs. during		–55% (27 vs. 12)		–1.2 to –0.2*
		During vs. post		16% (12 vs. 14)		–0.35 to 0.69
MEHHP		Pre vs. during		–56% (57 vs. 25)		–1.3 to –0.25*
		During vs. post		22% (25 vs. 31)		–0.3 to 0.72
MEP		Pre vs. during		23% (41 vs. 50)		–0.059 to 0.7
		During vs. post		7% (50 vs. 53)		–0.28 to 0.47
MBUP		Pre vs. during		–25% (43 vs. 32)		–0.44 to 0.043
		During vs. post		11% (32 vs. 35)		–0.12 to 0.36
MBZP		Pre vs. during		–12% (12 vs. 10)		–0.38 to 0.36
		During vs. post		13% (10 vs. 11)		–0.22 to 0.51
MMEP		Pre vs. during		–4% (12 vs. 12)		–0.28 to 0.32
		During vs. post		–19% (12 vs. 9.3)		–0.5 to 0.091
Abbreviations: CI, confidence interval; Post, postintervention; Pre, Preintervention. aPercent change in the GM between the two time periods, with GMs of the two time periods shown in parentheses. bEach change estimate represents the slope between the two time periods. *p < 0.05, and **p < 0.005. The intercept (which represents the log concentration during the intervention) was significant for all models except BPA. Creatinine and age (adult vs. child) were included in all models; creatinine was significant for MEOHP, MEP, MBUP, MBZP, MMEP; age was significant for MEP, MBUP, MBZP, and MMEP; sex was not significant in any of the models and was not included in the final models.