The patient distribution of changes in pain intensity after the treatment showed that 84% of group 1, 82% of group 2 and 56% of group 3 had pain reductions. There were statistically significant differences between groups 1 and 3 (P < 0.01) and between groups 2 and 3 (P < 0.01). Setbacks (increases in pain) occurred in 4% of groups 1 and 2, and in 38% of group 3.
The intention-to-treat analysis included all the patients with VAS pain evaluations, and the worst results were considered to be losses. The results from this evaluation were statistically significant in relation to decreased pain intensity in groups 1 and 2, but not in group 3 (Table 3).