Table 3.

Test–retest reliability for each COMI domain and for the overall COMI score

	Mean of the first application	Mean for retest	ICC (95 % CI)	SEM	MDC	MDC (%)
Back pain (0–10)	6.07 (2.36)	6 (2.43)	0.9 (0.86–0.94)	0.73	2.02	20.22
Leg pain (0–10)	5.79 (2.89)	5.63 (3.11)	0.79 (0.69–0.85)	1.34	3.71	37.13
Back function (1–5)	3.67 (0.79)	3.7 (0.78)	0.81 (0.72–0.87)	0.34	0.95	19.05
Symptom–specific well-being (1–5)	4.51 (0.76)	4.55 (0.81)	0.71 (0.58–0.8)	0.41	1.15	22.96
Quality of life (1–5)	3.56 (0.9)	3.57 (0.88)	0.74 (0.63–0.82)	0.46	1.28	25.54
Social disability (1–5)	3.51 (1.31)	3.65 (1.35)	0.85 (0.77–0.9)	0.51	1.42	28.44
Work disability (1–5)	2.91 (1.55)	2.95 (1.57)	0.88 (0.82–0.92)	0.54	1.49	29.82
Overall COMI score (0–10)	6.61 (2.04)	6.72 (2.04)	0.9 (0.85–0.93)	0.65	1.79	17.92

ICC intraclass correlation coefficient, SEM standard error of measurement, MDC minimum detectable change