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Table 2 Comparisons of headache intensity, headache days per month, and headache duration at baseline and during the COVID-19 pandemic

From: Overall trend towards headache remission during the COVID-19 pandemic among Chinese patients with pre-existing headache highlights the role of family support

variables Before COVID-19
(n = 2806)
During COVID-19
(n = 2806)
P value
Headache severity 4.290 ± 1.680 4.110 ± 1.609 < 0.001
Headache duration (h) 4.033 ± 7.325 3.414 ± 6.859 < 0.001
Headache days per month 2.092 ± 3.694 1.788 ± 2.989 < 0.001