Table 3

Change in patient's status: baseline (entry into the clinic) to three month follow up

		Baseline to three month follow up
		No	Mean at baseline	Mean at end of rehabilitation	Mean change	SRM^3-154	ES^3-154	Guyatt	p<^3-151
WOMAC^3-150
Pain	223	4.68	3.95	−0.73	0.377	0.336	0.520	0.001
Stiffness	223	4.76	4.56	−0.20	0.083	0.078	0.103	0.001
Function	223	4.67	4.27	−0.40	0.235	0.182	0.316	0.001
Global	223	4.68	4.22	−0.46	0.240	0.195	0.341	0.001
SF-36^3-150
Physical functioning	211	38.4	38.4	0.0	−0.001	−0.001	−0.002	0.986^3-152
Role physical	211	22.4	29.3	7.0	0.188	0.215	0.283	0.007
Bodily pain	211	28.2	37.9	9.7	0.468	0.557	0.776	0.001
General health	211	55.2	54.8	−0.5	−0.029	−0.022	−0.036	0.676^3-152
Vitality	211	43.1	45.7	2.6	0.157	0.131	0.221	0.024
Social functioning	211	66.8	68.7	1.9	0.075	0.069	0.091	0.274^3-152
Role emotional	211	53.5	55.3	1.8	0.037	0.039	0.045	0.596^3-152
Mental health	211	64.7	65.9	1.3	0.074	0.067	0.096	0.282^3-152
PCS^3-154	211	29.5	31.3	1.7	0.228	0.213	0.358	0.001
MCS^3-154	211	48.4	48.9	0.4	0.042	0.036	0.057	0.540^3-152

↵3-150 Mean scales: WOMAC from 0 (no symptoms) to 10 (maximal symptoms); SF-36 from 0 (maximal symptoms) to 100 (no symptoms). A negative responsiveness statistic reflects worsening of health status, a positive statistic indicates improvement.
↵3-151 Paired t test, p one tailed, null hypothesis: difference (mean at end of rehabilitation minus mean at baseline) = zero.
↵3-152 p >0.05: we accept the null hypothesis at type I error = 5%—that is, there is no difference.
↵3-154 SRM = standardised response mean; ES = effect size; PCS = physical component summary; MCS = mental component summary.