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Table 3 Incidence rates and hazard ratios for ischemic heart disease among migraine and control groups

From: A higher probability of subsequent stroke and ischemic heart disease in migraine patients: a longitudinal follow-up study in Korea

 

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

 
  1. CI confidence interval; PY person-years
  2. *Significance at P < 0.05
  3. aAdjusted for age, sex, income, residential region, obesity using body mass index, smoking status, drinking habit, systolic and diastolic blood pressure, fasting blood glucose, total cholesterol, hemoglobin, and Charlson Comorbidity Index scores