The Impact and Effectivity of an Inventory Survey for a Stroke Registry in Iwate Prefecture

Background: The accuracy of a stroke registration program in Iwate prefecture was greatly affected by cooperation from medical facilities and doctors in the field. The number of registered cases from noncore hospitals was less, but the accuracy of registration was unknown. This report presents the impact and effectivity of an inventory survey of the stroke registry. Subjects and Methods: Details of subjects living in coastal and northern regions of Iwate Prefecture who developed a cerebrovascular attack between 2012 and 2014 were obtained from the Iwate Stroke Registry through an inventory survey. Annual incidence rate from core hospitals and noncore hospitals were compared. To evaluate factors registered from noncore hospitals, multivariate analyses were performed for sex, age, living area, type of stroke, and past history of cerebrovascular diseases. Results: Annual crude incidence rate for 100,000 residual populations were 428.8 in men and 351.2 in women from core hospitals and 38.5 in men and 43.7 in women from noncore hospitals. Ratios of noncore hospitals against all the hospitals were 8.3% for men and 11.1% for women. Multivariate analyses for age, ischemic type of stroke, past history of cerebrovascular diseases, and living in areas without a core hospital were significant; however, sex was not a significant factor. Conclusion: The inventory survey of the stroke registry program in the Iwate prefecture was useful to prevent missing data of stroke cases from noncore hospitals, including patients who are elderly, with ischemic stroke onset, with a past history of stroke, or living in areas without core hospitals.