Table 3.

Decrease of pain score compared to V1 (i.e., baseline) as assessed by HCPI

	T1	V2	V3
n	42	35	29
Range	8 – 25	-3 – 23	1 – 26
Median	13	12	15
IQR	(9 to 15)	(8 to 18)	(9 to 18)
Mean	13.0 (-45%)	12.2 (-41%)	13.9 (-48%)
StdErr	0.62	1.14	1.13

Abbreviations: IQR Interquartile range, T1 First telephone interview, V2 and V3 Intermediate and final visit, respectively (see Fig. 4 for timeline)