Table 4.

Generalized estimating equation of outcome variables.

Life skill			Regression coefficient		SE	Wald χ2 (df)	P value
Problem-solving
	Experimental groupa	–2.283		1.107		4.250 (1)	.04 b
	Time (posttest)c	1.293		1.009		1.642 (1)	.20
	Experimental group × time (posttest)d	3.056		1.401		4.757 (1)	.03
Self-efficacy
	Experimental group	–2.225		1.269		3.073 (1)	.08
	Time (posttest)c	0.295		0.998		0.087 (1)	.77
	Experimental group × time (posttest)	6.135		1.404		19.098 (1)	<.001
Teamwork
	Experimental group	–1.708		0.730		5.471 (1)	.02
	Time (posttest)	1.880		0.468		16.112 (1)	<.001
	Experimental group × time (posttest)	1.025		0.947		1.172 (1)	.28

^areference group: control group

^bItalicized values indicate statistical significance at P>.05

^creference group: baseline

^dreference group: control × baseline