Table 2.

Correlation matrix ∆body temperatures, ∆heart rate, ∆N3 and ∆REM.

	N	∆N3						∆REM
		0–190 min			190–450 min			0–190 min			190–450 min
		r	p-value	r2	r	p-value	r2	r	p-value	r2	r	p-value	r2
∆CBT	71	− 0.0146	0.9038	0.000	0.0295	0.8007	0.001	− 0.1852	0.1220	0.034	− 0.1234	0.3054	0.015
∆PBT	71	0.0345	0.7753	0.001	− 0.3951	0.0007	0.156	− 0.2072	0.0830	0.043	0.2379	0.0455	0.057
∆CBT-PBT	70	− 0.0265	0.8278	0.001	0.4246	0.0002	0.180	0.1398	0.2483	0.020	− 0.3032	0.0107	0.092
∆HR	69	− 0.0224	0.8553	0.001	0.0281	0.8187	0.001	− 0.1685	0.1663	0.028	− 0.2170	0.0733	0.047

Bivariate correlations of the effects of the HM mattress – the LM mattress (HM-LM) of ∆ body temperatures and ∆HR with ∆N3, and ∆REM for the first (0–190 min) and second (190–450 min) part of the night. r, correlation coefficient; r², coefficient of determination = effect size (small effect size, r² = 0.01; medium effect size, r² = 0.09; large effect size, r² = 0.25³¹).

Significant values are in bold.