Table 6.

Results of a series of 4 × 2 mixed design ANOVA using group (chronic widespread pain, neck and back pain, neuropathic pain, and arthritis) and time (pretreatment, posttreatment).

Questionnaire	df	Effect of treatment			Effect of group			Treatment by group interaction
		F	p	η p 2	F	p	η p 2	F	p	η p 2
BDI-II	92	37.92	<0.001	0.292	0.39	0.758	0.013	0.40	0.757	0.013
BAI	87	14.48	<0.001	0.143	0.86	0.465	0.029	0.88	0.453	0.030
SF-MPQ
Sensory	71	4.08	0.047	0.054	1.77	0.160	0.070	1.84	0.148	0.072
Affective	94	4.33	0.040	0.044	0.10	0.959	0.003	0.79	0.503	0.025
Total	67	3.97	0.050	0.056	0.94	0.428	0.040	1.58	0.202	0.066
PDI	93	8.78	0.004	0.086	0.45	0.721	0.014	0.15	0.928	0.005
VPMI
Active	126	9.77	0.002	0.072	0.36	0.782	0.008	0.88	0.456	0.020
Passive	126	27.61	<0.001	0.180	0.61	0.611	0.014	0.19	0.903	0.005
SF-36
Physical function	133	2.63	0.108	0.019	2.52	0.061	0.054	0.15	0.927	0.003
Role limit: physical	130	17.50	<0.001	0.119	1.20	0.313	0.027	3.73	0.063	0.079
Role limit: emotional	132	9.93	0.002	0.070	0.29	0.826	0.008	1.58	0.197	0.035
Energy	129	13.78	<0.001	0.096	3.12	0.028	0.068	1.64	0.184	0.037
Emotional wellbeing	131	35.95	<0.001	0.215	0.66	0.577	0.015	0.51	0.675	0.012
Social	133	15.90	<0.001	0.107	0.97	0.407	0.021	0.85	0.467	0.019
Pain	128	28.91	<0.001	0.184	0.28	0.843	0.006	0.84	0.475	0.019
General health	134	3.10	0.080	0.023	0.32	0.809	0.007	0.07	0.976	0.002

Note. BDI-II: Beck Depression Inventory; BAI: Beck Anxiety Inventory; VAS: visual analogue scale; PDI = Pain Disability Index; VPMI: Vanderbilt Pain Management Inventory; SF-36: Short-Form Health Survey.