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. 2021 Dec 23;12:770980. doi: 10.3389/fneur.2021.770980

Table 2.

Comparison of headache characteristics between chronic and EM groups [data are shown as means (SD)].

Chronic migraine
(n = 36)
Episodic migraine
(n = 23)
p -value
Headache days per month 25.74 (5.03) 8.78 (3.26) <0.001
Headache severity (VAS) 7.42 (2.41) 7.37 (1.82) 0.936
Attack duration (hours per month) 19.33 (12.30) 15.48 (15.65) 0.296
Using abortive medication (days per month) 14.42 (10.25) 6.00 (4.17) <0.001