Additional file 1 of Accuracy of heart failure ascertainment using routinely collected healthcare data: a systematic review and meta-analysis

Additional file 1: Supplemental methods. Table S1. Characteristics of studies ascertaining acute heart failure (ordered by country and number of gold standard events). Table S2. Characteristics of studies ascertaining prevalent heart failure (ordered by country and number of gold standard events). Table S3. QUADAS-2 study quality assessment. Table S4. Sources of routine and gold standard data by country or region. Table S5. Gold standard heart failure ascertainment methods used in the reviewed studies. Table S6. Guidelines used for gold standard adjudication. Table S7. ICD-9 coding algorithms used to define heart failure in the studies reviewed. Table S8. ICD-10 coding algorithms used to define heart failure in the studies reviewed. Table S9. List of ICD codes used across the studies and their definitions. Table S10. Summary diagnostic accuracy statistics for coding algorithms ascertaining acute heart failure according to subgroup. Supplemental Figure S1. Calculation of performance statistics. Supplemental Figure S2. Funnel plot for the meta-analysis of studies ascertaining acute and prevalent HF using effective sample size weighted regression tests of funnel plot asymmetry. Supplemental Figure S3. SROC plot for the diagnostic accuracy of coding algorithms in studies with > 200 gold standard (GS) heart failure (HF) events. Supplemental Figure S4. SROC plots for the diagnostics accuracy of RCD algorithms ascertaining acute heart failure according to coding position. Supplemental Figure S5. SROC plots for the diagnostics accuracy of RCD algorithms ascertaining prevalent heart failure according to coding position