Table 1.

Descriptive and responsiveness data (n = 273)

	Entry		Discharge		Difference		Sample	Sample	MCID	MCID	Reliability
	m	s	m	s	m	s	ES	SRM	ES	SRM	ICC
Pain NRS	6.79	2.09	5.49	2.40	1.30	2.28	0.62	0.57	0.20	0.18	0.96
SF-36 physical functioning	39.5	21.0	48.1	22.3	8.5	18.2	0.41	0.47	0.26	0.30	0.93
SF-36 role physical	8.1	18.3	19.9	29.0	11.8	29.5	0.65	0.40	0.30	0.19	0.91
SF-36 bodily pain	18.1	13.5	27.9	15.7	9.8	16.3	0.72	0.60	0.33	0.27	0.89
SF-36 general health	41.1	15.8	45.4	17.1	4.3	14.8	0.27	0.29	0.57	0.61	0.67
SF-36 vitality	26.2	16.9	40.5	19.5	14.3	17.9	0.85	0.80	0.37	0.35	0.86
SF-36 social functioning	41.6	25.5	55.3	25.3	13.7	25.5	0.54	0.54	0.41	0.41	0.83
SF-36 role emotional	31.5	41.5	46.0	44.3	14.5	46.5	0.35	0.31	0.32	0.28	0.90
SF-36 mental health	45.7	19.6	56.3	18.2	10.6	16.0	0.54	0.66	0.39	0.47	0.85
SF-36 PCS	28.5	6.4	31.3	7.2	2.7	6.5	0.43	0.42	0.28	0.28	0.92
SF-36 MCS	36.5	11.6	42.7	11.6	6.3	10.0	0.54	0.63	0.32	0.37	0.90
MPI pain severity	23.0	15.0	35.7	18.8	12.7	17.6	0.85	0.72	0.42	0.36	0.82
MPI interference with pain	28.3	16.7	39.0	19.1	10.7	16.0	0.64	0.67	0.37	0.39	0.86
MPI life control	47.8	20.2	58.9	19.4	11.1	21.3	0.55	0.52	0.53	0.50	0.72
MPI control pain	42.4	26.0	54.3	22.9	11.9	26.8	0.46	0.44	0.46	0.44	0.79
MPI negative mood	42.3	22.1	55.8	22.5	13.5	20.7	0.61	0.65	0.56	0.59	0.69
MPI support	68.3	29.6	66.7	28.1	-1.6	16.6	-0.05	-0.10	0.45	0.80	0.80
MPI punishing responses	77.3	23.6	78.6	22.6	1.2	20.0	0.05	0.06	0.40	0.47	0.84
MPI solicitous responses	55.9	28.6	56.1	28.4	0.2	17.1	0.01	0.01	0.33	0.55	0.89
MPI distracting responses	52.4	28.0	52.6	27.9	0.2	20.1	0.01	0.01	0.62	0.86	0.62
MPI general activities	39.9	13.4	41.9	15.7	2.0	9.9	0.15	0.20	0.37	0.51	0.86
HADS anxiety	49.9	20.9	57.3	20.4	7.4	16.3	0.35	0.45	0.44	0.56	0.81
HADS depression	55.5	20.8	64.5	22.5	9.0	15.1	0.43	0.59	0.33	0.46	0.89
CSQ diverting attention	51.6	17.8	52.7	17.5	1.1	14.8	0.06	0.08	0.35	0.42	0.88
CSQ reinterpreting pain	27.0	20.6	30.1	20.2	3.1	16.2	0.15	0.19	0.32	0.40	0.90
CSQ self-statements	58.9	16.9	59.2	15.5	0.3	14.0	0.02	0.02	0.36	0.44	0.87
CSQ ignoring pain	46.5	18.6	47.4	17.9	0.8	15.0	0.05	0.06	0.26	0.33	0.93
CSQ praying or hoping	49.8	22.7	53.2	21.3	3.4	12.4	0.15	0.27	0.28	0.52	0.92
CSQ catastrophizing	45.8	18.4	52.7	19.1	6.9	14.6	0.38	0.48	0.26	0.33	0.93
CSQ activity level	57.3	15.0	59.0	14.5	1.7	12.6	0.11	0.14	0.30	0.36	0.91
CSQ pain behaviors	62.6	13.9	61.2	12.8	-1.5	10.0	-0.10	-0.15	0.39	0.54	0.85
CSQ control pain	43.9	23.0	50.9	19.6	7.0	23.8	0.30	0.29	0.42	0.41	0.82
CSQ decrease pain	37.8	20.2	45.9	18.9	8.1	22.0	0.40	0.37	0.67	0.62	0.55

NRS: Numeric Rating Scale, SF-36: Short Form 36, PCS: Physical Component Summary, MCS: Mental Component Summary, MPI: Multidimensional Pain Inventory, HADS: Hospital Anxiety and Depression Scale, CSQ: Coping Strategies Questionnaire. m: Mean, s: Standard deviation, ES: Effect Size, SRM: Standardized Response Mean. MCID: Minimal Clinically Important Difference in units of the ES or the SRM (see in Methods, Analysis), ICC: Intraclass Correlation Coefficient (obtained by literature review: i.e. the instruments' manuals). Scaling: 0 = no pain, 10 = most pain for the pain NRS; 0 = worst, 100 = best for all instruments' scales