Table I.

Patient characteristics (n=45).

Item	Intervention group (zinc therapy)	Placebo group	p-value
Age (years)			0.62†
- Mean ± SD	9.4 ± 2.1	8.28 ± 4.0
- Range	3 – 12	3 – 12
			0.74*
Males, n (%)	13 (56.5%)	12 (54.5%)
Females n (%)	10 (43.5%)	10 (45.5%)
Body weight (kg)			0.31†
- Mean ± SD	24.8 ± 8.1	25 ± 10.3
- Range	12 – 34.5	11.5 – 37
Age at first seizure (years)			0.62†
- Mean ± SD	3.58 ± 3.05	3.8 ± 1.6
- Range	1.75 – 6.3	1.5 – 5.75
Antiepileptic drugs used	valproate and levetiracetam	valproate and levetiracetam	-
Months of antiepileptic drug use			0.31†
- Mean ± SD	6.7 ± 2.4	7.1 ± 1.9
- Range	10 – 44	11 – 37

^†Two-way analysis of variance with factors: treatment group, center, and treatment by center.

^*Mantel-Haenszel summary chi-square, stratified by center.