Table 2.
Baseline characteristics of the study population based on migraine diagnoses shown in prevalence and medians (N = 62,578)
| Any ICD-8 and ICD-10 migraine diagnosis | Comparison cohort | Any ICD-8 migraine diagnosis |
Any ICD-10 migraine diagnosis |
Migraine without aura in ICD-10 |
Migraine with aura in ICD-10 |
|
|---|---|---|---|---|---|---|
| Characteristics | n = 10,857 (17%) | n = 51,721 (83%) | n = 2183 (20%) | n = 8674 (80%) | n = 2845 (26%) | n = 1698 (16%) |
| Age, median (IQR) | ||||||
| Years | 49 (44–53) | 49 (44–53) | 43 (38–47) | 50 (46–54) | 50 (46–54) | 51 (47–54) |
| Sex, No. (%) | ||||||
| Women | 7975 (73) | 38,104 (74) | 1574 (72) | 6401 (74) | 2239 (79) | 1200 (71) |
| Country of origin, No. (%) | ||||||
| Danish | 10,087 (93) | 49,177 (95) | 2118 (97) | 7970 (92) | 2615 (92) | 1586 (93) |
| Western | 272 (2) | 1399 (3) | 35 (2) | 237 (3) | 76 (3) | 55 (3) |
| Non-Western | 498 (5) | 1145 (2) | 31 (1) | 467 (5) | 154 (5) | 57 (3) |
| Marital status, No. (%) | ||||||
| Unmarried | 3029 (28) | 15,027 (29) | 566 (26) | 2,463 (28) | 824 (29) | 432 (25) |
| Educational level, No. (%) | ||||||
| Low | 3799 (35) | 17,757 (34) | 976 (45) | 2,823 (32) | 904 (32) | 530 (31) |
| Medium | 4173 (38) | 20,366 (40) | 814 (37) | 3359 (39) | 1089 (38) | 656 (39) |
| High | 2885 (27) | 13,598 (26) | 394 (18) | 2492 (29) | 852 (30) | 512 (30) |
| Previous headache diagnoses, No. (%) | ||||||
| Yes | 600 (6) | 524 (1) | 63 (3) | 537 (6) | 210 (7) | 86 (5) |
| Previous psychiatric diagnoses, No. (%) | ||||||
| Yes | 748 (7) | 2185 (4) | 126 (6) | 622 (7) | 191 (7) | 115 (7) |
| Charlson Comorbidity Index, No. (%) | ||||||
| 0 | 10,059 (93) | 48,729 (94) | 2135 (98) | 7925 (91) | 2,577 (91) | 1542 (91) |
| ≥1 | 789 (7) | 2992 (6) | 49 (2) | 749 (9) | 268 (9) | 156 (9) |
| Migraine contacts, median (IQR) | ||||||
| Number | 1 (1–2) | – | 1 (1–1) | 1 (1–2) | 1 (1–2) | 1 (1–2) |
ICD International Classification of Diseases 8th (ICD-8) and 10th version (ICD-10), IQR interquartile ranges