Abstract TP192: Comparison of Stroke Subtype and Admission Rate between Beijing, China and Ontario, Canada - A Population-Based Approach
Objective: Previous studies suggested Chinese were more likely to experience hemorrhagic stroke than Caucasian, however most of those studies were hospital-based and were performed more than a decade ago. We conducted a population-based study to investigate stroke subtypes and admissions rates in Beijing, China and Ontario, Canada from 2007 to 2009.
Methods: We identified all admissions for stroke or transient ischemic attack (TIA) in Beijing from the Discharge Abstract Database maintained by Beijing Public Health Information Center, and in Ontario from the Discharge Abstract Database maintained by the Canadian Institute for Health Information, using ICD-10 codes I63 and I64 (ischemic stroke), I60 (subarachnoid hemorrhage) and I61 (intracerebral hemorrhage) and G45 (TIA). Patients with medical history of stroke, age under 20 years were excluded. If patient had multiple hospitalizations, only the first one was included. We adjusted the world population in 2007 as the standard to calculate the gender/age standardized admission rates.
Results: During the study period, Beijing and Ontario had similar population size (~10 million) and age structure. In total, 140,574 patients in Beijing and 41,477 patients in Ontario had a first admission for stroke or TIA. Overall age/sex standardized admission rates were higher in Beijing than in Ontario (357 vs. 100 per 100,000). Of these patients, those in Beijing were younger than those in Ontario (Median of age in years: 66 vs. 76, p<0.001), and more likely to be male (58% vs. 49%, p<0.001), and to be TIA (22% vs. 17%, p<0.001), and less likely to have hypertension (68% vs. 75%, p<0.001) and diabetes (25% vs. 32%, p<0.001). Of these stroke patients in Beijing and Ontario, they were similar in subtype, ischemic stroke (84% vs. 82%) and hemorrhagic stroke (16% vs. 18%). The median length of hospital stay was much longer in Beijing than in Ontario (median 15 vs. 7 days, p<0.001).
Conclusion: There were substantial differences in baseline patient characteristics, admission rates and length of stay, but similar stroke subtypes between Beijing and Ontario. These findings suggest that enhanced stroke primary prevention efforts are needed to reduce the burden of stroke in China.
- © 2012 by American Heart Association, Inc.