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Table 2 Incidence and adjusted hazard ratios for new-onset acute myocardial infarction in stroke patients with or without acupuncture treatment stratified by age, sex, and subtypes of stroke

From: Decreased risk of acute myocardial infarction in stroke patients receiving acupuncture treatment: a nationwide matched retrospective cohort study

  No acupuncture Acupuncture treatment   
  n Events Person-years Incidenceb n Events Person-years Incidenceb HR (95 % CI)
Alla 46950 3915 361501 10.8 23475 1376 149047 9.2 0.86 (0.80–0.93)
Sex           
 Female 20098 1160 117882 9.8 10049 402 46412 8.7 0.85 (0.76–0.95)
 Male 26852 1818 147873 12.3 13426 652 60251 10.8 0.87 (0.80–0.95)
Age, years           
 40–49 3994 172 24672 7.0 1997 56 9388 6.0 0.84 (0.62–1.14)
 50–59 9274 536 56522 9.5 4637 160 21818 7.3 0.75 (0.63–0.90)
 60–69 16796 1125 97436 11.5 8398 390 38813 10.0 0.85 (0.75–0.95)
 70–79 16886 1145 87126 13.1 8443 448 36643 12.2 0.93 (0.83–1.03)
Subtypes of stroke           
 Hemorrhagic 4408 151 24568 6.1 2204 41 10327 4.0 0.62 (0.44–0.88)
 Ischemic 27096 1847 150560 12.3 13548 671 62138 10.8 0.87 (0.79–0.95)
 Others 15446 980 90628 10.8 7723 342 34199 10.0 0.89 (0.79–1.01)
  1. CI confidence interval, HR hazard ratio. aAdjusted for age, sex, low income, subtypes of stroke, hypertension, diabetes, mental disorders, hyperlipidemia, cardiac arrhythmia, traumatic brain injury, Parkinson’s disease, depression, Alzheimer’s disease, obesity, malignant brain tumors, smoking cessation, rehabilitation, anticoagulant, anti-platelet agents, lipid-lowering agents, admission to intensive care unit, neurosurgery, and lengths of hospital stay. The Akaike information criterion of the full model was 85795.051; the correlation coefficient of the Schoenfeld Residual for acupuncture and time of the full model was 0.00875, and the p-value was 0.5787, or no indication of lack of fit for the model. bPer 1000 person-years