Table 4 Incidence rates and hazard ratios for heart failure among migraine and control groups
| Â | 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 | 780 / 45,246 (1.7) | 429,509 | 1.82 | 0.11 (-0.03 to 0.25) | 1.07 (0.98–1.15) | 0.117 | 1.01 (0.95–1.08) | 0.668 |
 Control | 2,876 / 180,984 (1.6) | 1,688,613 | 1.70 |  | 1 |  | 1 |  |
Migraine with aura and control group (n = 16,815) | ||||||||
 Migraine with aura | 46 / 3,363 (1.4) | 35,005 | 1.31 | -0.03 (-0.46 to 0.40) | 0.98 (0.71–1.35) | 0.896 | 0.85 (0.7–1.02) | 0.084 |
 Control | 184 / 13,452 (1.4) | 137,254 | 1.34 |  | 1 |  | 1 |  |
Migraine without aura and control group (n = 209,414) | ||||||||
 Migraine without aura | 2,746 / 41,883 (6.6) | 382,261 | 7.18 | 0.13 (-0.02 to 0.27) | 1.07 (0.99–1.16) | 0.098 | 1.04 (0.97–1.10) | 0.286 |
 Control | 8,388 / 167,532 (5.0) | 1,517,339 | 5.53 |  | 1 |  | 1 |  |