Table 5.

Comparison of headache-related characteristics of the participating pregnant women before and during pregnancy.

Frequency of Headaches	More Than Once a Month during Pregnancy	Once a Month and Less Often Than Once a Month during Pregnancy	Total (n)
More than once a month before pregnancy	53	63	116	X2 = 14.606 * p = 0.000 **
Once a month and less often than once a month before pregnancy	14	61	75
Total	67	124	191
Severity of Headaches	No pain and mild pain during pregnancy	Severe and very severe pain during pregnancy	Total (n)	X2 = 14.194 * p = 0.000 **
Mild pain before pregnancy	41	12	53
Severe and very severe pain before pregnancy	65	73	138
Total	106	85	191

* X²_McNemar ** p < 0.05.