Table 2.

Indicators of circadian rhythmicity across the interventionTwo-level mixed-effects linear regression with IS, IV and RA as the dependent variables. The coefficients express how the dependent variable changes in the intervention group compared with the control group. All analyses were controlled for age and gender.

	Coefficient	SE	z	p
IS; T1	0.009	0.054	−0.17	0.863
IS; T2	0.043	0.054	0.80	0.424
IV; T1	−0.259	0.097	−2.66	0.008a
IV; T2	−0.045	0.097	−0.46	0.647
RA; T1	0.021	0.050	0.42	0.673
RA; T2	−0.010	0.050	−0.20	0.843

IS: Interdaily stability IV: Intradaily variability RA: Relative amplitude T1: Intervention period 1 T2: Intervention period 2.

^aStatistically significant at the 0.05 level.