Table 2.

Demographic and pain characteristics in relation to RE^*.

	N*	Mean	Pearson correlation	P value
RE**	60	7.8, 2.42	−	−
Age	60	46.9, 15.77	0.073	0.58
Onset of pain (m)	60	49.07, 51.95	−0.185	0.16
NOS***	60	2.55, 1.77	−0.222	0.09
Sleep quality	47	6.45, 2.79	−0.081	0.59
HRQoL	43	6.12, 2.42	−0.121	0.44
Muscle tenderness score	56	2.80, 2.99	−0.083	0.54
VPS at intake	57	7.77, 1.79	0.087	0.54
VPS at last visit	20	6.30, 3.34	0.425	0.06
Pain improvement rate (PIR) (0 → 10)	60	4.68, 3.28	−0.3	0.02

*Absolute numbers and percentages can be smaller than the cohort if answers were missing or ambiguous.

**RE- Recalled expectation rates inquired retrospectively during telephone interview rated from 0 to 10.

***NOS, number of surfaces.