| No. of event / No. of total (%) | Follow-up duration (PY) | Incidence rate per 1000 (PY) | Incidence rate difference (95% CI) | Hazard ratios (95% CI) | |||
---|---|---|---|---|---|---|---|---|
Crude | P-value | Overlap weighted modela | P-value | |||||
Migraine and control group (n = 226,230) | ||||||||
 Migraine | 2,973 / 45,246 (6.6) | 416,160 | 7.14 | 1.69 (1.43 to 1.95) | 1.31 (1.26–1.37) | < 0.001* | 1.31 (1.26–1.35) | < 0.001* |
 Control | 9,012 / 180,984 (5.0) | 1,651,691 | 5.46 |  | 1 |  | 1 |  |
Migraine with aura and control group (n = 16,815) | ||||||||
 Migraine with aura | 227 / 3,363 (6.7) | 33,886 | 6.70 | 2.05 (1.21 to 2.90) | 1.44 (1.24–1.68) | < 0.001* | 1.21 (1.11–1.31) | < 0.001* |
 Control | 624 / 13,452 (4.6) | 134,352 | 4.64 |  | 1 |  | 1 |  |
Migraine without aura and control group (n = 209,414) | ||||||||
 Migraine without aura | 2,746 / 41,883 (6.6) | 382,261 | 7.18 | 1.66 (1.38 to 1.93) | 1.30 (1.25–1.36) | < 0.001* | 1.27 (1.22–1.31) | < 0.001* |
 Control | 8,388 / 167,532 (5.0) | 1,517,339 | 5.53 |  | 1 |  | 1 |  |