Understanding of determinants of severe maternal morbidity is crucial for reducing Maternal Near Misses (MNM) and Maternal Deaths (MD). We aimed to assess whether being referred from lower level to tertiary-level hospitals is a determinant of MNM and MD in Luanda, capital of Angola.A facility-based case control study was conducted (June-September 2022) at 2 referral hospitals in Luanda. Consecutive sampling for...