Table 4. The Finding of NCV Study Before and After the Treatment by the Low-Level Laser in the First and Third Months .

		Pre	Post (1 month)	P Value	Post (3 months)	P Value
NCV study	Severely impaired	9 (30)	6 (20)	0.754	0 (0.0)	<0.001
	Moderately impaired	21 (70)	18 (60)		6 (2.0)
	Mildly impaired	0 (0.0)	6 (20)		6 (20)
	Unimpaired	0 (0.0)	0 (0.0)		18 (70)
EMG study	No voluntary motor unit potential	21 (70)	12 (40)	0.648	0 (0.0)	<0.001
	Single voluntary motor unit potential	9 (30)	6 (20)		0 (0.0)
	Discrete activity pattern	0 (0.0)	6 (20.0)		6 (20.0)
	Reduced interference pattern	0 (0)	6 (20)		6 (20)
	Complete recovery	0 (0.0)	0 (0.0)		18 (60)

Data are shown as No. (%).