Valid N T Z p-level PAQprev (mean=551.75 μm)&PAQpost(mean=567.08 μm) 12 7.000000 2.510287 0.012064

Table 3: Wilcoxon Matched Pairs Mean Comparison Test for dependent samples: before treatment vs. after treatment data. Marked tests are significant at p <0.05000 (lágrima 3).