Table 2.

Test statistics

	Pre-op	FU	Z a	P
SF-36
Physical functioning	18.1	66.9	−4.022	<0.001
Role-physical	9.5	52.4	−3.874	<0.001
Bodily pain	17.6	61.5	−4.039	<0.001
General health	25.2	63.7	−4.020	<0.001
Vitality	33.1	65.7	−4.025	<0.001
Social functioning	33	66.4	−4.033	<0.001
Role-emotional	3.1	55.1	−3.891	<0.001
Mental health	51.6	76.6	−4.024	<0.001
VAS	8.2	1.7	−4.040	<0.001

Wilcoxon signed-rank test

^aBased on positive ranks