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Background: Quality indicators (QIs) are an accepted tool for measuring a hospital’s performance in routine care. We examined national trends in adherence to the QIs developed by the Close The Gap-Stroke program by combining data from the health insurance claims database and electronic medical records, and the association between adherence to these QIs and early outcomes in patients with acute ischemic stroke in Japan. Methods: In the present study, patients with acute ischemic stroke who received acute reperfusion therapy in 351 Close The Gap-Stroke-participating hospitals were analyzed retrospectively. The primary outcomes were changes in trends for adherence to the defined QIs by difference-in-difference analysis and the effects of adherence to distinct QIs on in-hospital outcomes at the individual level. A mixed logistic regression model was adjusted for patient and hospital characteristics (eg, age, sex, number of beds) and hospital units as random effects. Results: Between 2013 and 2017, 21 651 patients (median age, 77 years; 43.0% female) were assessed. Of the 25 defined measures, marked and sustainable improvement in the adherence rates was observed for door-to-needle time, door-to-puncture time, proper use of endovascular thrombectomy, and successful revascularization. The in-hospital mortality rate was 11.6%. Adherence to 14 QIs lowered the odds of in-hospital mortality (odds ratio [95% CI], door-to-needle <60 min, 0.80 [0.69–0.93], door-to-puncture <90 min, 0.80 [0.67–0.96], successful revascularization, 0.40 [0.34–0.48]), and adherence to 11 QIs increased the odds of functional independence (modified Rankin Scale score 0–2) at discharge. Conclusions: We demonstrated national marked and sustainable improvement in adherence to door-to-needle time, door-to-puncture time, and successful reperfusion from 2013 to 2017 in Japan in patients with acute ischemic stroke. Adhering to the key QIs substantially affected in-hospital outcomes, underlining the importance of monitoring the quality of care using evidence-based QIs and the nationwide Close The Gap-Stroke program.

The purpose of this study was to investigate the relationship between incidence rates of schizophrenia and residential features in Nagasaki City, Japan. Social features of residents in 259 areas in the Nagasaki City ecological structure were determined using the results of the 1980 national census. Six residential factors--employment status, occupational and academic career, household status, length of residence, housing tenure and young male predominance--were selected as factors that clearly reflect residential differentiation of residents. Contrary to the findings of many other studies conducted in Western cities, no statistically significant differences were observed, although it seemed that incidence rates were comparatively higher in the lower social classes. These results possibly reflect differences in cultural and social values and structures.