부산대학교 도서관

Objectives. Subtypes of stroke and their risk factors differ considerably in the severity of induced symptoms and patients' death rate. This study explored the ratio of patients with each stroke subtype in Taiwan and factors affecting the mortality of inpatients with strokes. Methods. Data of patients diagnosed with stroke between 2011 and 2014 were retrieved from the National Health Insurance Database. After excluding patients who had experienced stroke in the previous year, the data of 230,638 patients were included in this study. The mortality risk of these patients was analyzed with regard to their stroke subtypes. In addition, the death rate and mortality within 2 years of diagnosis were determined. Results. Of the four major subtypes of stroke, cerebral infarction was the most common(62.21%), followed by cerebral hemorrhage(18.37%), unspecified cerebrovascular diseases(16.50%), and subarachnoid hemorrhage(2.92%). When the group of patients with unspecified cerebrovascular diseases was used as the reference group, the odds ratio of patients with cerebral infarction, cerebral hemorrhage, and subarachnoid hemorrhage increased by 2.07(confidence interval [CI]=2.00-2.14), 5.80(CI=5.57-6.03), and 9.66(CI=9.06-10.29) fold, respectively. Exploring patients in medical institutes of different levels revealed that the 2-year odds ratio of inpatients with stroke in medical center was 0.94 times that of their counterparts in regional hospital. The occurrence rate of stroke increased by 0.06 when patient age increased by 1 year. The odds ratio of male patients experiencing stroke was 1.1 times that of female patients. The odds ratio of stroke patients living in urban regions was 0.94 times that of their counterparts living in rural regions. Conclusion. In Taiwan, the occurrence rate of stroke was higher in men than in women. Cerebral infarction was the most common stroke subtype(62.21%). The 2-year odds ratio of patients was affected by stroke subtype, age, sex, place of residence, and level of medical institute providing treatment.