Table 3. Pain severity before (VAS1) and after accomplishing the treatments (VAS2) accompanied by the comparison of two groups .

Group	Variable
	Pain (VAS 1)	Pain (VAS 2)	P-value †
Control	5.9 ± 1.34 3	3.62 ± 2.01	P<0.05
Bioptron	6.2 ± 1.38	3.78 ± 2.19	P<0.05
	P>0.05	P>0.05*

*between groups after the trial: P=0.685(Kruskal-wallis)

†within each group (before & after the trial)(Willcoxon-signed rank)