Table 1.
Demographic characteristics within the different groups
| Mean age years ± SD | Primipara n (%) | Smoking before pregnancy n (%) | Elevated blood pressure before/during pregnancy n (%) | Other complaints during pregnancy n (%) | |
|---|---|---|---|---|---|
| Participants Q1 (n = 2,126) | 28.4 ± 4.8 | 893 (42) | 936 (44) | Before: 47 (2) | – |
| Partial non-participants (answered Q1 only) (n = 508) | 27.7 ± 5.1 | 213 (42) | 252 (50) | Before: 12 (2) | – |
| Partial non-participants (answered Q1 + Q2 only) (n = 345) | 28.5 ± 4.7 | 153 (44) | 160 (46) | Before: 6 (7) | 169 (49) |
| ‘Liberal migraine diary group’ (n = 208) | 29.5 ± 4.6 | 83 (40) | 73 (35) | Before: 73 (4) | 107 (51) |
| During: 23 (11) | |||||
| Partial non-participants (diagnosed migraineurs not filling in calendar) (n = 225) | 28.3 ± 4.9 | 76 (34) | 112 (50) | Before: 9 (4) | 62 (28) |
| During: 20 (9) | |||||
| ‘Strict migraine diary group’ (n = 66) | 29.5 ± 4.7 | 28 (42) | 15 (23) | Before: 2 (3) | 35 (53) |
| During: 9 (14) | |||||
| Partial non-participants not filling in diaries completely (n = 142) | 29.4 ± 4.8 | 55 (39) | 58 (41) | Before: 5 (4) | 72 (51) |
| During: 14 (10) |
‘Other complaints during pregnancy’ were mainly pelvic pain, nausea unrelated to headache, back pain and oedema