Table 6.

Logistic regression analysis of FS recurrent rate between LEV group and control group.

Onset age (months)	FS frequency before enrolled	Group	The number of patients		χ2	OR (95% CI)	P value (two-sided)
			Patients with FS recurrence	Patients without FS recurrence
<18	2–4	LEV	4	17	18.397	0.089 (0.029–0.268)	<0.001
		Control	5	2
	5–15	LEV	6	15
		Control	4	2
≥18	2–4	LEV	0	25
		Control	8	10
	5–15	LEV	1	10
		Control	2	4

OR, odds ratio; CI, confidence interval.