Appendix 2

Summary of P-values for main effects and interactions.

	Self-efficacy		Energy		HR-QOL

	Main	Interaction	Main	Interaction	Main	Interaction
Age^a (3 levels)	0.328	0.146	0.167	0.006	0.135	0.170

Sex^a (2 levels)	0.271	0.915	0.834	0.623	0.628	0.449

Ethnicity^a (2 levels)	0.255	0.241	0.849	0.849	0.249	0.632

Lives alone^a (2 levels)	0.589	0.496	0.249	0.824	0.173	0.079

Educational level^a (3 levels)	0.842	0.074	0.856	0.341	0.244	0.930

Accommodation type^a (2 levels)	0.263	0.375	0.233	0.857	0.273	0.412

Condition^a (4 levels)	0.246	0.162	0.390	0.971	0.108	0.364

Medically unexplained^a (2 levels)	0.622	0.346	0.086	0.103	0.834	0.520

Years with condition^a (3 levels)	0.076	0.657	0.026^b	0.343	0.433	0.500

Life satisfaction	<0.001	0.335	<0.001	0.733	0.008	0.190

Self-care	0.864	0.067	0.031	0.442	0.275	0.144

General health^a (2 levels)	0.385	0.107	0.002	0.300	<0.001	0.022

Baseline self-efficacy	<0.001	0.006	<0.001	0.399	<0.001	0.007

Baseline energy	0.083	0.063	<0.001	0.963	0.016	0.038^b

Baseline HR-QOL	0.003	0.035	<0.001	0.285	<0.001	0.013

Healthcare use	0.388	0.123	0.389	0.037^b	0.723	0.947

Preference for course	0.949	0.229	0.912	0.419	0.593	0.284

↵a Categorical variable: unless indicated, variables were treated as continuous.
↵b Not significant when controlled for strategic health authority. HR-QOL = health-related quality of life.