Table 4.

Generalized estimating equation analysis of longitudinal outcomes in the impact of COPD (N=60)

Category	Variable	Estimate	SE	Wald chi-square	P-value
Items 1~3 symptoms	Intercept	4.033	0.477	71.431	<0.001
	Experimental groupa	0.567	0.730	0.602	0.438
	T2b	0.497	0.530	0.879	0.348
	T1b	1.039	0.536	3.755	0.053
Experimental group* T2c	−1.794	0.7626	5.535	0.019*
	Experimental group* T1c	−1.855	0.7215	6.606	0.010*
Items 4~6 activity	Intercept	1.733	0.3494	24.612	<0.001
	Experimental groupa	0.767	0.6086	1.587	0.208
	T2b	0.028	0.4432	0.004	0.95
	T1b	0.738	0.4305	2.939	0.086
Experimental group* T2c	−0.979	0.7575	1.671	0.196
	Experimental group* T1c	−1.763	0.7384	5.704	0.017*
Items 7~8 impact	Intercept	2.833	0.4057	48.763	<0.001
	Experimental groupa	0.000	0.6415	0.000	1.000
	T2b	−0.406	0.5587	0.529	0.467
	T1b	0.693	0.4417	2.465	0.116
Experimental group* T2c	0.507	0.6465	0.614	0.433
	Experimental group* T1c	−0.371	0.5580	0.442	0.506

Notes: *P<0.05. ^aReference group: control group, ^breference group: T0 (baseline), ^creference group: control group *T0 (T0=baseline, T1=1 month after intervention, T2=3 months after intervention).