Table 1.

The mean visual analog scale scores of pain severity at different time intervals in the three study groups (confidence interval 95%)

Time interval	Control group	810-nm laser group	980-nm laser group	P
Before treatment	4.78±1.97	5.17±1.43	4.48±1.85	0.41
Immediate effect
First session
After 15min	4.13±2.2	2.83±1.66	2.3±1.74	0.005
Second session
After 15min	3.83±2.1	1.74±0.4	1.39±0.3	<0.001
Late effect
After 1week	4±1.9	1.65±0.3	1±0.2	<0.001
After 1 month	3.83±1.92	1.13±0.3	1.3±0.3	<0.001
After 2 months	3.87±1.96	1.09±0.3	1.39±0.3	<0.001
P	0.1	<0.001	<0.001