Table 3.

Intra-class coefficients (ICC) for clustering effects at 16 weeks (BEL N = 100; CAU N = 80) and at the 6-month follow-up (BEL N = 89; CAU N = 70)

	Baseline to 16 weeks	Baseline to 6-month follow-up	16 weeks to 6-month follow-up
Activity engagement	0.13	0	0.09
Activity level	0	0.04	0.04
Satisfaction with daily activities	0.03	0	0
Activity balance	0	0.08	0.05
Activity value	0	0	0.01
General QoL	0.02	0	0
Satisfaction with life domains	0.07	0	0
Self-esteem	0	0.05	0.04
Self-rated health	0.03	0	0.04
GAF symptoms	0.12	0.38	0.43
GAF function	0.22	0.46	0.41