Summary
Growing evidence indicates that improved nurse staffing in acute hospitals is associated with lower hospital mortality. Current research is limited to studies using hospital level data or without proper adjustment for confounders which makes the translation to practice difficult.
In this observational study published in BMC Health Services Research, Haegdorens et al. analysed retrospectively the control group of a stepped wedge randomised controlled trial of 14 medical and 14 surgical wards in seven Belgian hospitals. All patients admitted to these wards during the control period were included in this study. Pregnant patients or children below 17 years of age were excluded.
The records showed that, on average, three out of every thousand patients in the hospital died ‘unexpectedly’. A death is considered as unexpected when a patient suddenly dies during active treatment, with no care plan for the end of their life having been started.
Their results are in accordance with previous research and confirm the association between higher nurse staffing levels and lower patient mortality. Furthermore, they also found that a higher proportion of bachelor’s degree nurses is related to a reduction in patient mortality. They proposed a new method to estimate optimal staffing levels using ward level data.
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