Table 4.

Hierarchical regression analysis for physiological extinction recall (dERI; N=61). HF[ms²] and HF[ms²]×Sex interaction were significant predictors. Note that smaller dERI denotes better extinction recall. HF[ms²]: Absolute power of high frequency heart rate variability; %REM: Proportion of REM sleep to the total sleep time; REMD: REM density; REML: REM latency.

Model	Predictors	B	SE	β	t	p	95% CI
1	Sex	−.531	.345	−.213	−1.539	.130	−1.221	.160
	Medications	.017	.386	.006	.045	.964	−.757	.791
	%REM	−.043	.025	−.234	−1.763	.083	−.093	.006
	REMD	.143	.053	.379	2.718	.009	.037	.248
	REML	−.008	.003	−.323	−2.481	.016	−.015	−.002
									Change			ANOVA
									∆F	p	Adj. R2	F	p
2	Sex	−.591	.338	−.237	−1.750	.086	−1.269	.086	2.738	0.074	0.165	2.700	0.01
	Medications	.143	.385	.048	.370	.713	−.630	.915
	%REM	−.051	.024	−.275	−2.113	.039	−.100	−.003
	REMD	.156	.052	.414	2.976	.004	.051	.261
	REML	−.010	.003	−.397	−3.021	.004	−.017	−.003
	HF[ms2]	−.416	.199	−.358	−2.089	.042	−.816	−.016
	HF[ms2]×Sex	.651	.293	.401	2.223	.030	.064	1.238