N | Person-years | Events | Incidence* | Model 1 | Model 2 | Model 3 | Model 4 | Model 5 | ||||||
HR | (95% CI) | HR | (95% CI) | HR | (95% CI) | HR | (95% CI) | HR | (95% CI) | |||||
No acupuncture | 5610 | 29 594 | 1025 | 34.6 | 1.00 | (reference) | 1.00 | (reference) | 1.00 | (reference) | 1.00 | (reference) | 1.00 | (reference) |
Acupuncture | 5610 | 27 208 | 720 | 26.5 | 0.76 | (0.69 to 0.83) | 0.76 | (0.69 to 0.84) | 0.76 | (0.69 to 0.84) | 0.75 | (0.68 to 0.83) | 0.73 | (0.66 to 0.80) |
Model 1: unadjusted.
Model 2: adjusted for age and sex.
Model 3: adjusted for age, sex, urbanisation, low income and stay in medical centre.
Model 4: adjusted for covariates in model 3 plus subtypes of stroke, intensive care unit stay, neurosurgery and length of stay.
Model 5: adjusted for covariates in model 4 plus hypertension, diabetes, mental disorder, chronic obstructive pulmonary disease, ischaemic heart disease, urinary tract infection, hyperlipidaemia, pneumonia, congestive heart failure, epilepsy, renal dialysis and liver cirrhosis.
*Per 1000 person-years.