Table 3.

Estimates of fixed effects from the linear mixed effects model predicting TST variability^a.

Predictors	Model 1b				Model 2c				Model 3d
	Estimated	CI	P valuee	Estimated		CI	P valuee	Estimated		CI	P valuee
Age	0.01	0.00 to 0.01	.01f	0.01		0.00 to 0.01	.01f	0.01		0.00 to 0.01	.01f
Gender (male)	0.11	0.01 to 0.21	.038g	0.11		0.01 to 0.21	.03g	0.10		0.00 to 0.21	.06
Number of children	–0.05	–0.11 to 0.00	.056	–0.05		–0.11 to 0.00	.052	–0.06		–0.11 to –0.00	.01g
Origin (migrant background)	–0.03	–0.15 to 0.10	.56	–0.03		–0.15 to 0.09	.54	–0.03		–0.15 to 0.08	.56
Occupation (service)	–0.17	–0.28 to –0.05	.004g	–0.17		–0.28 to –0.05	.004g	–0.15		–0.27 to –0.05	<.001h
MEQ	0	–0.01 to 0.02	.55	0		–0.01 to 0.02	.57	0		–0.01 to 0.02	.60
Snoozer (yes)	0.18	0.07 to 0.30	.002 g	0.18		0.07 to 0.30	.002f	0.15		0.05 to 0.27	.006f
Daylength	—i	—	—	0		–0.00 to 0.01	.16	0		–0.00 to 0.01	.08
Stringency Index	—	—	—	0		–0.00 to 0.00	.10	0		–0.00 to 0.01	.17
Steps (×1000)	—	—	—	—		—	—	–0.01		–0.01 to 0.00	.007g
Midsteps	—	—	—	—		—	—	–0.01		–0.02 to –0.00	.02f
Intradaily variability	—	—	—	—		—	—	–0.16		–0.23 to –0.09	.001h

^aThe σ² values for models 1-3 were 0.24, 0.24, and 0.24, respectively. The intraclass correlation coefficient values for models 1-3 were 0.14, 0.14, and 0.14, respectively. The marginal R²/conditional R² values for models 1-3 were 0.059/0.195, 0.060/0.194, and 0.068/0.200, respectively. The Akaike information criterion values for models 1-3 were 5458.745, 5457.957, and 5436.793, respectively.

^bIncludes demographic and occupational variables.

^cIncludes model 1 + restriction and seasonal factors.

^dIncludes model 2 + physical activity influences.

^fP<.05.

^gP<.01.

^hP<.001.

ⁱNot available.