Multidisciplinary biopsychosocial rehabilitation for chronic low back pain: the need to present minimal important differences units in meta-analyses

Table 2 Distribution of SDR for each instrument with an anchor-based MID

MBT vs Usual Care	Median SDR	Minimum SDR	Maximum SDR
Short-term (studies with established MID, n = 6/9)
NRS (n = 2)	1.256	1.053	1.460
VAS 0–10 cm (n = 4)	0.698	0.638	0.938
Overall (n = 6)	0.826	0.638	1.460
Medium-term (studies with established MID, n = 5/6)
NRS (n = 2)	0.931	0.909	0.952
VAS 0–10 cm (n = 3)	0.682	0.622	0.789
Overall (n = 5)	0.789	0.622	0.952
Long-term (studies with established MID, n = 7/7)
NRS (n = 3)	0.909	0.769	0.952
VAS 0–10 cm (n = 4)	0.732	0.560	1.071
Overall (n = 7)	0.769	0.560	1.071

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