Efficacy of Low-Level Laser Therapy in Reducing Pain in the Initial Stages of Orthodontic Treatment

Table 1

Intergroup comparability.

Variables	Laser group (n = 28), mean (SD)	Control group (n = 26), mean (SD)	P
Age (years)	26.84 (13.83)	29.13 (13.39)	0.540^t
Little irregularity index	4.94 (3.87)	5.19 (3.17)	0.794^t
Gender			DF = 1
Male	13	11	λ^2 = 0.09
Female	15	15	0.760^x
Type of malocclusion
Class I	13	12	DF = 2
Class II	11	11	λ^2 = 0.10
Class III	04	03	0.947^x

^tIndependent t-test. ^xChi-square test.