Table 4.

Mean ( ± SD) SF-12 physical and mental health scores in the PSM and ALG groups

Assessment/assessment time	PSM group	ALG group
Physical health
Preoperatively	31.7 ± 8.5 (n = 14)	32.4 ± 7.8 (n = 11)
6 months postoperatively	42.6 ± 9.0 (n = 17)	39.9 ± 10.3 (n = 13)
Mental health
Preoperatively	34.9 ± 8.5 (n = 14)	38.1 ± 11.4 (n = 11)
6 months postoperatively	51.1 ± 11.2 (n = 17)	49.5 ± 13.4 (n = 13)

None of the differences between the groups were significant, but within each group, there were significant improvements at 6 months in both physical health (P = 0.049 in the PSM group and P = 0.03 in the ALG group) and mental health (P = 0.002 in the PSM group and P = 0.02 in the ALG group; Wilcoxon test)