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 headaches | Weighted number of cases in Estonian population based person-to-person sample survey | Proportions of diagnoses among headache sufferers in the population based person-to-person sample (%) | Number of cases after weighting in the online sample | Proportions of diagnoses among headache sufferers in the online sample (%) | p-value for the proportions being different (χ2 tested) |
|---|---|---|---|---|---|
Episodic migraine | 204.6 | 42 | 375.6 | 31 | < 0.001 |
Chronic migraine | 11 | 2 | 28.5 | 2 | 1 |
Episodic TTH | 200 | 41 | 654.9 | 54 | < 0.001 |
Chronic TTH | 18.7 | 4 | 48.4 | 4 | 0.96 |
TACs | 4.5 | 1 | 5.3 | 1 | 0.41 |
Other primary headaches | 29.8 | 6 | 57.1 | 5 | 0.31 |
Unidentifiable | 24 | 5 | 41.8 | 3 | 0.21 |