Table 2

ANCOVA and logistic regression for differential treatment effects with the pre test as covariate.

	Usual care group	Problem-solving treatment group	F	P-value
HADS, mean (SD)	8.97 (4.1)	8.17 (3.9)
Anxiety pre	7.54 (4.1)	6.72 (3.7)	0.35^a	0.558
Anxiety post	7.67 (4.0)	7.12 (3.8)
Depression pre	6.41 (4.0)	5.20 (3.8)	2.41^a	0.123
Depression post	16.54 (7.0)	15.25 (7.0)
Total pre	13.91 (7.4)	11.92 (6.9)	1.37^a	0.243
Total post

SPSI-R, mean (SD)
SPSI-R pre	90.94 (13.1)	85.49 (12.4)
SPSI-R post	92.06 (12.3)	90.06 (10.9)	1.83^a	0.179

SF-36, mean (SD)
Physical components score pre	41.17 (11.4)	46.49 (1.7)
Physical components score post	43.43 (12.0)	49.33 (11.3)	2.25^a	0.136
Mental components score pre	37.75 (11.1)	38.11 (10.3)
Mental components score post	40.20 (12.4)	41.78 (10.9)	0.74^a	0.391

Frequency of consulting GP, mean (SD)
Pre	3.28 (2.7)	2.83 (3.0)
Post	1.47 (2.1)	1.39 (1.5)	0.007^b	0.932

↵a F (1,128).
↵0 F (1,117). ANCOVA = analysis of covariance (F). HADS = Hospital Anxiety and Depression Scale. Post = post treatment. Pre = pre treatment. SPSI–R = Social Problem Solving Inventory-Revised.