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Table 3 Comparison of headache characteristics between chronic and episodic patients

From: An investigation of oxidant/antioxidant balance in patients with migraine: a case-control study

VariableEpisodic Migraineurs
(n = 44)
Chronic Migraineurs
(n = 27)
P value
MeanSDMeanSD
Number of headache days per month9.46.023.36.00.000
Headache severity (VAS scale)7.351.527.702.030.410
Number of analgesic medications per month4.153.8510.3611.220.009
  1. VAS, Visual Analog Scale (VAS)
  2. SD, Standard Deviation