Table 5.

Estimates of effects on boys' engagement level during recess.

Estimation of covariance parameters
Parameter	Estimate	s.e.	Wald Z	p-Value	95% CI of the estimate
Residual	0.006	0.001	7.25	<0.001	0.005, 0.008
Intercept variance (recess group)	0.002	0.001	1.85	0.03	0.001, 0.006
Intercept variance (school)	0.002	0.001	1.21	0.11	0.0004, 0.010

Estimation of fixed effects
Parameter	Estimate	s.e.	t-Test statistic	p-Value	95% CI of the estimate
Intercept	0.30	0.13	2.27	.03	0.03, 0.57
Safety and structure	0.005	0.007	0.66	.52	−0.009, 0.02
Adult engagement and supervision	0.03	0.007	3.83	<.001	0.01, 0.04
Student behaviors	0.002	0.004	0.46	.65	−0.006, 0.009
Transitions	0.01	0.01	0.92	.36	−0.02, 0.03
School level SES	0.02	0.16	0.12	.90	−0.35, 0.39