Table 5.

Multilevel Model Estimates for Overall Sleep

Fixed Effect	Coefficient	SE	t-value	p-value
Average level of sleep efficiency
Intercept	3.753	0.122	30.887	<0.001
Gender	0.080	0.132	0.610	0.544
Age	0.007	0.071	0.102	0.919
Income	0.165	0.055	2.990	0.004
Self-rated health	−0.180	0.067	−2.699	0.009
Mean PA	0.038	0.153	0.246	0.806
Mean NA	−0.156	0.084	−1.852	0.068
iSD PA	−0.152	0.083	−1.819	0.073
iSD NA	−0.033	0.091	−0.367	0.715
Trait NA	−0.154	0.076	−2.021	0.047
Trait PA	0.205	0.072	2.854	0.006
Negative reactivity	−0.073	0.171	−0.428	0.670
Positive reactivity	−0.083	0.274	−0.304	0.762
Net reactivity	0.077	0.233	0.331	0.742
Trait PA squared	−0.048	0.053	−0.906	0.368
Negative reactivity squared	0.067	0.061	1.095	0.277
Positive reactivity squared	−0.085	0.044	−1.913	0.060
Net reactivity squared	−0.015	0.063	−0.237	0.813
Trait PA × Negative reactivity	−0.430	0.154	−2.794	0.007
Trait PA × Positive reactivity	−0.764	0.231	−3.309	0.001
Trait PA × Net reactivity	−0.645	0.231	−2.789	0.007
Weekend slope
Intercept	0.002	0.077	0.027	0.978
Exercise slope
Intercept	−0.001	0.001	−0.547	0.585
Caffeine slope
Intercept	−0.018	0.025	−0.701	0.484
Sleep medication slope
Intercept	−0.280	0.453	−0.619	0.536
Sleep time slope
Intercept	0.002	0.001	2.604	0.009

Note. NA = negative affect. PA = positive affect.