Coverage and Validity of the Swedish Registry of Cardiopulmonary Resuscitation Regarding In-hospital Cardiac Arrest

The study will have an observational retrospective cross-sectional design. Patient records and hospital administrative systems at 10 hospitals in Sweden will be searched using ICD-codes to find all patients treated for an in-hospital cardiac arrest (IHCA) during the time period of 20180101 to 20191231. All found patients will be cross-checked against reported patients in the Swedish Registry of Cardiopulmonary Resuscitation (SRCR). Any differences in patient characteristics or regarding situation factors between reported and non-reported patients will be evaluated. Non-reported patients will be retrospectively reported to the registry. An incidence of IHCA will be calculated using the number of patients treated for IHCA divided by number of hospital admissions during the specific time period. Selected variables will be evaluated regarding compliance to report and regarding concordance with patient records. All missing data will be described and evaluated. Local reporting procedures at each hospital will be described and evaluated regarding compliance to report and regarding missing data.