Does the diurnal cycle of cortisol explain the relationship between physical performance and cognitive function in older adults?

Table 2 Overview of the significant correlations and associations between indices for the entire sample

Dependent variable	Independent variable	Correlation		Regression
Dependent variable	Independent variable	r	P	Adj. R²	∆R²	F	P	β	P
MMSE	8MWT	.733	.000^b	.528	.261	12.855	.000^b	.621	.000^b
	6MWT	−.743	.000^b	.587	.314	16.040	.000^b	−.639	.000^b
	30SCST	−.733	.000^b	.566	.297	14.574	.000^b	−.615	.000^b
	TGUG	.770	.000^b	.590	.318	16.285	.000^b	.691	.000^b
	Variance_All	−.315	.023^a	.302	.061	5.330	.001^a	−.254	.043^a
TMT-A_t	8MWT	.589	.000^b	.350	.096	6.383	000^b	.377	.009^b
	6MWT	−.630	.000^b	.378	.120	7.082	000^b	−.398	.003^b
	30SCST	−696	.000^b	.499	.232	10.544	000^b	−.544	.000^b
	TGUG	.720	.000^b	.429	.168	8.526	000^b	.502	.000^b
TMT-B_t	8MWT	.391	.010^a	.233	.127	3.489	.011^a	.433	.013^a
	6MWT	.447	.003^b	.274	.163	4.090	.005^a	−.460	.004^b
	30SCST	^.470	.002^b	.306	.195	4.440	.003^b	−.499	.002^b
	TGUG	.484	.001^b	.324	.207	4.931	.002^b	.558	.001^b
TMT_B-A	8MWT	.628	.000^b	.360	.194	5.284	.001^b	.535	.002^b
	6MWT	−.617	.000^b	.356	.190	5.198	.001^b	−.497	.002^b
	30SCST	−.575	.000^b	.314	.158	4.295	.004^b	−.450	.007^b
	TGUG	.698	.000^b	.451	.272	7.243	.000^b	.640	.000^b
8MWT	Variance_All	−.316	.024^a
6MWT	Variance_All	.332	.017^a	.046	.080	1.484	.214	.322	.047^a

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