Table 3.
Number of acupuncture treatments and risk of acute myocardial infarction in stroke patients
| Acupuncture treatment | Number | Events | Person-years | Incidenceb | HR | (95 % CI)a |
|---|---|---|---|---|---|---|
| Numbers of packages | ||||||
| 0 | 46950 | 2978 | 265756 | 11.2 | 1.00 | (reference) |
| ≥1 | 23475 | 1054 | 106663 | 9.9 | 0.86 | (0.80–0.93) |
| ≥2 | 16789 | 733 | 81701 | 9.0 | 0.79 | (0.73–0.86) |
| ≥3 | 13236 | 550 | 66789 | 8.2 | 0.73 | (0.67–0.80) |
| ≥4 | 10946 | 449 | 56537 | 7.9 | 0.71 | (0.64–0.78) |
| ≥5 | 9361 | 374 | 49103 | 7.6 | 0.68 | (0.61–0.76) |
| ≥6 | 8117 | 330 | 43027 | 7.7 | 0.69 | (0.62–0.77) |
| ≥7 | 7150 | 276 | 38333 | 7.2 | 0.65 | (0.58–0.74) |
| ≥8 | 6341 | 249 | 34381 | 7.2 | 0.66 | (0.58–0.75) |
| ≥9 | 5715 | 220 | 31218 | 7.0 | 0.64 | (0.56–0.74) |
| ≥10 | 5147 | 199 | 28312 | 7.0 | 0.64 | (0.56–0.74) |
| ≥11 | 4731 | 184 | 26153 | 7.0 | 0.64 | (0.55–0.74) |
| ≥12 | 4335 | 169 | 24206 | 7.0 | 0.64 | (0.55–0.75) |
| ≥13 | 3994 | 151 | 22417 | 6.7 | 0.62 | (0.52–0.73) |
| ≥14 | 3706 | 143 | 20854 | 6.9 | 0.63 | (0.53–0.77) |
| ≥15 | 3455 | 130 | 19545 | 6.7 | 0.61 | (0.51–0.73) |
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. P value (Cochran-Armitage test) <0.0001
bPer 1000 person-years