Table 2.

Descriptive statistics, mean differences and effect sizes of outcome variables (N = 440)

	Before rehabilitation			After rehabilitation			Mean differences
	At least 1 consultation (%)	Range	M (SD)	At least 1 consultation (%)	Range	M (SD)	T	Effect size (Cohens’d)
Index health-care utilization	99.7	0–151	23.24 (16.75)	93.9	0–146	19.41 (19.27)	3.806***	.21
General practitioners	94.6	0–120	5.22 (6.59)	85.9	0–48	3.76 (4.68)	4.276***	.24
Specialists	93.0	0–48	5.32 (5.48)	84.4	0–35	3.53 (4.51)	4.264***	.34
Admission to hospital	30.2	0–9	0.41 (0.82)	18.6	0–15	0.22 (0.87)	2.758**	.22
Physiotherapy	67.0	0–90	8.29 (0.16)	49.2	0–60	7.89 (0.26)	0.293	.22
Massage	45.9	0–50	4.08 (9.56)	34.8	0–60	3.24 (11.01)	2.675**	.04
Psychotherapy	16.3	0–48	1.01 (6.14)	17.8	0–25	0.99 (6.23)	0.288	.14
Complementary therapist	17.3	0–20	0.94 (3.539)	15.2	0–15	0.65 (3.08)	2.144*	.01

M mean, SD standard deviation; *** p < .001, ** p < .01,* p < .05