Table 2 Background variables in the different studies
Author | Schrader et al. [11] | Tronvik et al. [12] | Stovner et al. [13] | Hagen et al. [14] | All |
|---|---|---|---|---|---|
Publication year | 2001 | 2003 | 2014 | 2015 | – |
Number included | 60 | 60 | 72 | 72 | 264 |
Mean age (SD) | 41.1 (10.2) | 42.9 (12.0) | 37.3 (10.7) | 38.9 (12.3) | 39.9 (11.5) |
Female sex, n (%) | 50 (83.3) | 47 (78.3) | 59 (81.9) | 63 (87.5) | 219 (83.0) |
Migraine with aura, n (%) | 27 (45.0) | 28 (46.7) | 33 (45.8) | 23 (31.9) | 111 (42.0) |
Mean BMI (SD) | 24.3 (4.4) | 25.3 (4.3) | NA1 | 24.4 (3.7) | 24.7 (4.1) |
Mean age at first migraine attack (SD) | 17.1 (7.7) | 19.6 (9.1) | 17.9 (10.7) | 20.1 (9.3) | 18.7 (9.3) |
Mean self-reported frequency of migraine attacks/months (SD) | 4.3 (1.6) | 3.7 (1.2) | 4.8 (3.6) | 3.6 (1.6) | 4.1 (2.3) |
Mean migraine days/4 weeks (SD) | 6.6 (3.4) | 5.7 (2.9) | 5.3 (3.1) | 5.3 (2.3) | 5.7 (2.9) |
Mean headache days/4 weeks (SD) | 9.7 (5.2) | 8.4 (3.9) | 8.2 (4.3) | 6.4 (2.8) | 8.1 (4.2) |