Table 2.

Comparison of VAS scores of three groups at different observation time

Groups	Pretreatment	2 weeks	4 weeks	8 weeks	F-Value	p Value
I + PG (n = 20)	7.30 ± 0.979	4.40 ± 0.681a	2.40 ± 0.598a	1.25 ± 0.639a	198.566	< 0.001
PG (n = 20) IG (n = 20)	7.25 ± 0.786 7.15 ± 0.933	4.80 ± 1.005a 5.70 ± 0.801a	3.75 ± 1.070a 3.55 ± 0.826a	3.00 ± 1.257a 2.45 ± 0.686a	96.426 141.444	< 0.001  < 0.001
F-Value	0.143	12.572	14.582	19.594
p-Value	0.867	< 0.001	< 0.001	< 0.001

^ap < 0.05