Table 2 Baseline characteristics of the study population based on migraine diagnoses shown in prevalence and medians (N = 62,578)
From: Mid- to late-life migraine diagnoses and risk of dementia: a national register-based follow-up study
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) |