HES denominators methodology

SSNAP uses HES data from previous years to calculate a denominator for each routinely admitting team to set “expected” numbers of future admissions per year. SSNAP wishes to check and validate the number of records each team has submitted to the audit in previous years against the contemporaneous HES for that time period, and to set expected figures for the upcoming year. Comparing the number of SSNAP admissions to the expected figure for each team is an important validation for SSNAP, and acts as a measure of case ascertainment for England.

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