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Table 3 Mean daily headache incidence (%) in each season in year 2007

From: Patients with migraine are right about their perception of temperature as a trigger: time series analysis of headache diary data

Groups Whole year Spring1 (Mar-May) Summer2 (Jun-Aug) Autumn3 (Sep-Nov) Winter4 (Dec-Feb) P* Post-hoc*
All patients (N = 66) 22.5 ± 4.8 23.8 ± 4.9 21.3 ± 4.3 21.4 ± 4.8 23.6 ± 4.4 <0.001 1 > 2; 1 > 3; 4 > 2; 4 > 3
Temperature sensitive patients (N = 34) 19.7 ± 6.6 19.3 ± 6.4 18.9 ± 5.9 19.1 ± 6.9 21.5 ± 7.1 0.031 4 > 3; 4 > 2; 4 > 1
Temperature non-sensitive patients (N = 32) 25.5 ± 6.5 28.5 ± 6.2 23.7 ± 5.8 23.8 ± 5.9 25.9 ± 6.9 <0.001 1 > 2; 1 > 3; 1 > 4
  1. *Headache incidence of four seasons was compared by ANOVA and LSD post-hoc test