Table 2 Data extracted from identified studies
From: Prevalence of familial cluster headache: a systematic review and meta-analysis
Country | Authors | Study Design | Diagnostic Criteria | Method of data acquisition | Sample size (n) | Probands with FAMILY HISTORY of CH (n, %) | Probands with FAMILY HISTORY (M) | Probands with FAMILY HISTORY (F) |
|---|---|---|---|---|---|---|---|---|
USA | Kudrow and Kudrow (1994) [27] | Retrospective Study | • Adhoc Committee on classification of headache 1962 • ICHD-1 | • Proband interview • Semi-structured phone interview • Direct examination | 300 | 26 (8.6%) | 7 | 19 |
Denmark | Russell et al (1996) [28] | Retrospective Study | • ICHD-1 | • Questionnaire • Semi-structured phone interview • Direct examination | 366 | 25 (6.8%) | 17 | 9 |
Italian | Montagna et al (1998) [13] | Retrospective Study | • ICHD-1 | • Semi-structured phone interview | 222 | 5 (2.25%) | NA | NA |
French | El Amrani et al (2002) [29] | Consecutive case- series | • ICHD-1 | • Direct examination | 220 | 44 (10.75%) | 12 | 8 |
Italian | Torelli and Manzoni (2003) [30] | Retrospective Study | • ICHD-1 | • Semi-structured phone interview | 186 | 20 (4.34%) | 30 | 8 |
Italian | Taga et al (2015) [31] | Retrospective Study | • ICHD3β | • Clinical documentation | 691 | 40 (4.92%) | 28 | 12 |
Italian | Leone et al (2001) [14] | Retrospective Study | • ICHD-1 | • Semi-structured phone interview Direct examination | 785 | 44 (20%) | 29 | 15 |
UK | O’Connor et al (2020)a | Retrospective Study | • ICHD3β | • Semi-structured phone interview • Direct examination | 645 | 48 (7.44%) | 35 | 13 |