Risk prediction models specific to the maternal critical care population was developed. The models compare favorably against general adult ICU risk prediction models in current use within this population.

The aim was to develop and validate an accurate risk prediction model for both mortality and a combined outcome of mortality and morbidity for maternal admissions to critical care.

For the primary outcome of acute hospital mortality, our parsimonious risk model consisting of eight variables had an area under the receiver operating characteristic of 0.96 these variables are commonly available for all maternal admissions.

All female admissions to adult general critical care units, for the period January 1, 2007–December 31, 2016, 16–50 years old, and admitted either while pregnant or within 42 days of delivery-a cohort of 15,480 women.

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