Retrospective Assessment of the Standardized Mortality Ratio as a Measure of the Quality of Care in a Major Intensive Care Unit in the Republic of Cyprus

Abstract

IntroductionThe standardized mortality ratio (SMR) is commonly used to assess the overall quality of care by comparing the observed hospital mortality with the mortality predicted by statistical models. If the observed deaths are less than the predicted, the overall quality of care can be considered high; in the opposite case, it is low.AimThe aim of the study was to assess the overall quality of care in an intensive care unit (ICU) during the period of 2012 to 2017. We also reported our experience and lessons learned throughout the surveillance period.MethodsA retrospective study design was adopted. Healthcare-associated infections (HAI–ICU) protocol v1.1 was used in a major ICU for a period of 6 years. All patients admitted to the ICU during the surveillance period were included in the study. The SMR was measured.ResultsDuring the 6-year period, 1067 patients were admitted and remained hospitalized for more than 48 hours; 207 patients' discharge status was reported as “death”, compared to 309 deaths predicted based on the SAPS II score. The overall mean observed mortality rate during the study period was 19.4%, as opposed to 28.95% for the predicted mortality. The overall mean SMR was 0.62 (IQR 0.49-0.82). Difficulties were faced due to the lack of surveillance software, but they were overcome by the use of a freely available web-based form.ConclusionsThe overall quality of ICU care is considered to correspond to high-quality standards, since standardized mortality rates during the study period were lower than one. The use of the web-based form as an alternative solution to the surveillance software performed well in terms of recording data.

Healthcare Quality According to ICU Level of Care

“…SMR < 1 means that the actual mortality rate is lower than predicted, so the quality of the procedure is appropriate. SMR is calculated according to patient's data on admission from disease severity [13] [14].…”