Table 1.

Generalised Estimating Equations parameter estimates for the effect of intervention on depression and anxiety. The group by time interaction is verified for both scales. There is difference in the linear effect of time between intervention and control for the depression scale (b = −29.423) and for the anxiety level (b = −11.212).

Parameter	B	SE	Wald chi-square	p value
Dependent variable: depression
(Intercept)	13.692	2.4018	32.498	<0.001
Intervention	43.096	2.8172	234.011	<0.001
Time	11.702	0.8333	197.222	<0.001
Intervention ∗ time	−29.423	1.0952	721.794	<0.001
Dependent variable: anxiety
(Intercept)	34.558	1.4154	596.135	<0.001
Intervention	16.75	1.8077	85.854	<0.001
Time	4.913	0.5757	72.853	<0.001
Intervention ∗ time	−11.212	0.83	182.442	<0.001