Accuracy of online symptom checkers and the potential impact on service utilisation.

Objectives: The aims of our study are firstly to investigate the diagnostic and triage performance of symptom checkers, secondly to assess their potential impact on healthcare utilisation and thirdly to investigate for variation in performance between systems.

Setting: Publicly available symptom checkers for patient use.

Participants: Publicly available symptom-checkers were identified.

Trends in Risk-Adjusted 28-Day Mortality Rates for Patients Hospitalized with COVID-19 in England.

Early reports showed high mortality from coronavirus disease 2019 (COVID-19). Mortality rates have recently been lower; however, patients are also now younger, with fewer comorbidities. We explored 28-day mortality for patients hospitalized for COVID-19 in England over a 5-month period, adjusting for a range of potentially mitigating variables, including sociodemographics and comorbidities.

A review of factors predicting perioperative death and early outcome in hepatopancreaticobiliary cancer surgery.

Objectives: In the context of comparisons of surgical outcomes, risk adjustment is the retrospective adjustment of a provider's or a surgeon's results for case mix and/or hospital volume. It allows accurate, meaningful inter-provider comparison. It is therefore an essential component of any audit and quality improvement process.