Table 3.

Analysis of Autism-Spectrum Quotient (ASQ) as a function of the interaction between Hg and HRV (N = 195). Reported are standardized estimates (with 95% confidence intervals) for Hg associations with ASQ for differing (low vs. high) levels of HRV responses to acute stress. Results with significant or marginally significant interactions are shown in bold. All models include controls for age, gender, race, SES, and Pb.

	Vagal Reactivity* Hg
	LF* Hg	HF* Hg	LF/HF* Hg
Autism-Spectrum Quotient (ASQ)	Hg (Low LF)/Hg (High LF)	Hg (Low HF)/Hg (High HF)	Hg (Low LF/HF)/Hg (high LF/HF)
Total Score	−0.12 (−0.33, 0.09)/0.22* (0.01, 0.44)	−0.01 (−0.24, 0.21)/0.12 (−0.09, 0.34)	−0.13 (−0.36, 0.10); 0.24* (0.01, 0.46)
Social Skills	−0.09 (−0.31, 0.12)/0.18# (−0.03, 0.40)	0.04 (−0.19, 0.27)/0.05 (−0.17, 0.26)	−0.18 (−0.40, 0.05)/0.26* (0.04, 0.49)
Attention Switching	−0.04 (−0.26, 0.18)/0.03 (−0.19, 0.25)	−0.02 (−0.25, 0.21)/0.02 (−0.20, 0.23)	−0.09 (−0.32, 0.14)/0.09 (−0.13, 0.32)
Attention to Detail	−0.10 (−0.32, 0.11)/0.18# (−0.03, 0.40)	−0.11 (−0.34, 0.12)/0.18# (−0.03, 0.39)	0.06 (−0.17, 0.29)/0.02 (−0.21, 0.24)
Communication	0.02 (−0.19, 0.23)/0.13 (−0.08, 0.34)	0.12 (−0.10, 0.34)/0.05 (−0.17, 0.26)	−0.03 (−0.25, 0.19)/0.19# (−0.02, 0.41)
Imagination	−0.13 (−0.33, 0.07)/0.11 (−0.10, 0.31)	−0.05 (−0.27, 0.16)/0.04 (−0.16, 0.24)	−0.19# (−0.41, 0.02)/0.15 (−0.06, 0.36)

^#p < 0.10;

^*p < 0.05;

^**p < .01