Variables independently associated with severe maternal outcome by Poisson multiple regression analysis (n = 321).

*Considering cluster design (center/hospital), PR: prevalence ratio, CI: confidence interval, ICU = intensive care unit.Statistical model including variables: Age, ethnicity, marital status, schooling, number of pregnancies, any previous disease, chronic hypertension, post-partum admission, ICU admission, magnesium sulphate use, lack of medication, inadequate monitoring, delay in transfer, lack of trained staff, diagnosis delay, treatment opportunity, inadequate management, hemorrhagic complication, HELLP syndrome, severe hypertension, pulmonary edema, severe sepsis, gestational age at birth.