Data quality of acute stroke and myocardial infarction events registry in China, 2015–2019

Objective  To evaluate the data quality of acute stroke and myocardial infarction (MI) events records in China. Methods  Ten surveillance hospitals in Hebei, Jiangsu, Zhejiang, Hubei and Sichuan provinces were selected for this study. Stroke and MI event records reported between January 2015 and December 2019 were selected by quota sampling in each hospital. Data for stroke and MI event records were obtained from 'National Surveillance System for Chronic Disease, China Center for Disease Control and Prevention'. The completeness and accuracy of the event records were verified according to the electronic health records via a self-developed online quality assessment system. Results  A total of 2184 acute stroke records were evaluated and data were 100.00% complete for the key variables. The consistency of key variables between the reported and the actual records were 79.21%-95.15%. A total of 2 062 acute stroke events were verified, the average positive predictive value was 94.41%, ranging from 93.07% to 96.14%. During 2015—2019, the accuracy of key variables of stroke reports significantly increased (P Conclusion  The completeness of stroke and MI events reports were high in China during 2015—2019, and the report accuracy gradually increased, yet false positive reports still existed. It is necessary to strengthen the standardized reporting of stroke and MI events