Table 4: Test statistics. Wilcoxon signed ranks test. Based on positive ranks. Based on negative ranks.

vas2w-vaspiVas1m-vaspiVas3m-vaspiVas4m-vaspiVas6m-vaspi

−4,390−4,410−4,395−4,392−4,124
Asymp.Sig. (2-tailed),000,000,000,000,000

vas1m-vas2wvas3m-vas2wVas4m-vas2wvas6m-vas2w

−3,257−2,751−1,629−2,644
Asymp.Sig. (2-tailed),001,006,103,008

vas3m-vas1mvas4m-vas1mvas6m-vas1mvas4m-vas3m

−,736−2,656−4,234−2,762
Asymp.Sig. (2-tailed),461,008,000,006

vas6m-vas3mVas6m-vas4m

−4,148−4,239
Asymp.Sig. (2-tailed),000,000

vaspi: VAS score at preinjection; vas2w: VAS score at 2 weeks (after injection); vas1m: VAS score in first month; vas3m: VAS score in third month; vas4m: VAS score in fourth month; vas6m: VAS score in sixth month.