LAUSR

Objective: World Health Organization recommends the use of maternal near miss as a tool to monitor and improve quality of obstetric care. Severe maternal outcome corresponds to the sum of maternal near miss and maternal death cases. This study was aimed at validating Acute Physiology and Chronic Health Evaluation II and IV, Simplified Acute Physiology Score III, and Sequential Organ Failure Assessment in pregnant and postpartum women in predicting severe maternal outcome. Design: A retrospective cohort study. Setting: Obstetric ICU in a tertiary care hospital in Brazil. Patients: Pregnant and postpartum women admitted to the obstetric ICU during a 3-year period. Interventions: None. Measurements and Main Results: A total of 279 women were admitted to ICU, an admission rate of 34.6/1,000 live births, and the mortality index to severe maternal outcome (maternal death/maternal near miss + maternal death) was 7.7%. Total Sequential Organ Failure Assessment had a better overall performance than remaining scores for total hospitalizations (area under the curve, 0.86; standardized mortality ratio, 0.96; 95% CI, 0.74–1.22), for hypertensive direct causes (area under the curve, 0.81; standardized mortality ratio, 0.73; 95% CI, 0.31–1.43), and indirect causes (area under the curve, 0.89; standardized mortality ratio, 0.85; 95% CI, 0.59–1.19). The Acute Physiology and Chronic Health Evaluation II had a better overall performance than total Sequential Organ Failure Assessment for hemorrhagic causes (area under the curve, 0.75; standardized mortality ratio, 1.0; 95% CI, 0.61–1.54). Conclusions: Total Sequential Organ Failure Assessment may be used to predict severe maternal outcome in obstetric populations admitted to ICU. The Acute Physiology and Chronic Health Evaluation II may be applied to predict severe maternal outcome in hemorrhagic complications. We do not recommend Acute Physiology and Chronic Health Evaluation IV and Simplified Acute Physiology Score III for the prediction of severe maternal outcome.