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Table 4 Comparison of proportions of different primary headache diagnoses among headache sufferers in the two samples

From: The applicability of web-based solutions in headache epidemiology research

Primary headachesWeighted number of cases in Estonian population based person-to-person sample surveyProportions of diagnoses among headache sufferers in the population based person-to-person sample (%)Number of cases after weighting in the online sampleProportions of diagnoses among headache sufferers in the online sample (%)p-value for the proportions being different
(χ2 tested)
Episodic migraine204.642375.631<  0.001
Chronic migraine11228.521
Episodic TTH20041654.954<  0.001
Chronic TTH18.7448.440.96
TACs4.515.310.41
Other primary headaches29.8657.150.31
Unidentifiable24541.830.21
  1. TTH tension-type headache, TACs trigeminal autonomic cephalalgias
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