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. 2021 Aug 21;22(1):97. doi: 10.1186/s10194-021-01314-7

Table 2.

Impact of COVID-19 of preexisting headache

Variables Patient with Migraine p Patients with TTH p
Before infection After infection Before infection After infection
Attack severity
 Mean ± SD 7.235 ± 2.05 7.42 ± 2.36 0.501 5.556 ± 1.86 7 ± 2.25 0.033*
Headache days per month
 Means± SD 8.18 ± 7.36 8.55 ± 7.17 0.584 7 ± 6.29 12.72 ± 7.96 0.006*
Analgesic use days per month
 Means± SD 2.31 ± 1.65 3.05 ± 2.09 0.002* 2.28 ± 1.74 3.06 ± 2.44 0.177

COVID-19 Coronavirus disease-19, SD standard deviation, TTH tension type headache

*=P < 0.05, Paired sample t-test