Table 1.
Summary of study characteristics
| Study | Country | Diagnosis classification | Study setting | No. patients | No. medication overuse headache | |||
|---|---|---|---|---|---|---|---|---|
| Analgesics | Ergots | Opioids | Triptans | |||||
| Altieri et al. 2009 [11] | Italy | ICHD-2 [7] | Clinic | 27 | 11 | NR | NR | 4 |
| Ayzenberg et al. 2008 [12] | Germany | ICHD-2 [7] | Clinic | 29 | 14 | NR | NR | 15 |
| Biagianti et al. 2012 [13] | Italy | ICHD-2 Revised [8] | Clinic | 52 | 26 | NR | NR | 20 |
| Boe et al. 2007 [14] | Norway | ICHD-2 Appendix [7] | Clinic | 100 | 20 | 1 | NR | 23 |
| Coppola et al. 2010 [15] | Italy | ICHD-2 Appendix [7] | Clinic | 29 | 10 | NR | NR | 9 |
| Cupini et al. 2009 [16] | Italy | ICHD-2 Appendix [7] | Clinic | 33 | NR | 1 | NR | 4 |
| Di Lorenzo et al. 2009 [17] | Italy | ICHD-2 [7] | Clinic | 107 | 18 | NR | NR | 29 |
| Donnet et al. 2009 [18] | France | ICHD-2 [7] | Population | 320 | 157 | 25 | 29 | 64 |
| Dousset et al. 2013 [19] | France | ICHD-2 Appendix [7] | Clinic | 42 | 8 | 1 | 0 | 9 |
| Galli et al. 2011 [20] | Italy | ICHD-2Appendix [7] | Clinic | 82 | 21 | 2 | 3 | 22 |
| Gambini et al. 2013 [21] | Italy | ICHD-2 Revised [8] | Clinic | 63 | 33 | NR | NR | 21 |
| Gomez-Beldarrain et al. 2011 [22] | Spain | ICHD-2Revised [8] | Clinic | 42 | 25 | NR | NR | 3 |
| Hagen et al. 2009 [23] | Norway | ICHD-2 Appendix [7] | Clinic | 56 | 18 | NR | 14 | 17 |
| Jonsson et al. 2011 [6] | Sweden | ICHD-2 Appendix [7] | Population | 799 | 517 | 7 | 33 | 66 |
| Lorenzo et al. 2012 [24] | Italy | ICHD-2 Appendix [7] | Clinic | 43 | 17 | NR | NR | 8 |
| Pageler et al. 2008 [25] | Germany | ICHD-2 [7] | Clinic | 20 | 1 | 3 | NR | 5 |
| Perrotta et al. 2010 [26] | Italy | ICHD-2 [7] | Clinic | 31 | 11 | NR | NR | 19 |
| Perrotta et al. 2012 [27] | Italy | ICHD-2 [7] | Clinic | 27 | 4 | NR | NR | 6 |
| Radat et al. 2013 [28] | France | ICHD-2 [7] | Clinic | 17 | 2 | NR | 2 | 4 |
| Rainero et al. 2006 [29] | Italy | ICHD-2 [7] | Clinic | 18 | NR | 2 | NR | 3 |
| Relja et al. 2006 [30] | Italy | ICHD-2 [7] | Clinic | 101 | 38 | 9 | 0 | 12 |
| Rossi et al. 2006 [31] | Italy | ICHD-2 Revised [8] | Clinic | 118 | 63 | 3 | NR | 24 |
| Rossi et al. 2011 [32] | Italy | ICHD-2 Revised [8] | Clinic | 100 | 57 | 1 | NR | 23 |
| Sances et al. 2010 [33] | Italy | ICHD2 Revised [8] | Clinic | 172 | 42 | 5 | 5 | 50 |
| Sandrini et al. 2011 [34] | Italy | ICHD-2 Appendix [7] | Clinic | 56 | 23 | 2 | NR | 20 |
| Terrazzino et al. 2010 [35] | Italy | ICHD-2 Revised [8] | Clinic | 227 | 79 | 2 | 1 | 32 |
| Trucco et al. 2010 [36] | Italy | ICHD-2Revised [8] | Clinic | 70 | 18 | 0 | NR | 9 |
| Valguarnera et al. 2010 [37] | Italy | ICHD2 [7] | Clinic | 95 | 20 | 2 | 2 | 30 |
| Zeeberg et al. 2006 [38] | Denmark | ICHD2 Revised [8] | Clinic | 216 | 63 | 8 | 12 | 43 |