Table 3. Comparing Migraine Attacks Frequency and Severity Before and After Treatment^a.

Variables	Sodium Valproate	Zonisamide	P Value
Mean of attack frequency in a month
Start of treatment	5.48 ± 1.61	5.42 ± 1.56	0.86
After 3 months	3.55 ± 1.23	3.24 ± 1.41	0.27
Difference	1.93 ± 1.1	2.18 ± 1.17	0.30
Mean of attack severity in a month
Start of treatment	6.84 ± 1.83	6.76 ± 1.9	0.84
After 3 months	3.82 ± 1.43	4.24 ± 1.76	0.22
Difference	3.02 ± 1.01	2.52 ± 1.13	0.03
Mean of attack days in a month
Start of treatment	8.3 ± 1.78	7.91 ± 1.92	0.21
After 3 months	5.07 ± 1.65	4.69 ± 1.56	0.27
Difference	3.23 ± 1.34	2.62 ± 1.09	0.13

^aValues are expressed as mean ± SD.