Table 1.

Definition of variables

Variables	Definition	Treatment
Emergency Caesarean section	Woman delivered via CS after presenting with an obstetric emergency	Binary variable taking the value of “1” if woman was delivered via CS, and “0” if woman delivered spontaneously.
Independent
variables
Age group (in years)	Age of the mother as indicated in the health records classified based on the obstetric risk profile	Categorical variable
Marital status	Marital status of the mother	Categorical variable
Educational level attained	Highest educational level of the mother	Categorical variable
Employment status	Employment status of the mother	Categorical variable
Parity	Number of births of the pregnant woman in her lifetime	Categorical variable
Number of gestations	Number of foetuses carried in the index pregnancy	Categorical variable
Booking status	Was the pregnant woman described as registered (booked) for antenatal care in the index pregnancy?	Yes or no
Maternal complication	Obstetric complication of the mother for which she was managed after presenting at the emergency	Categorical variable
Member of dyad with complication	Who had the complication for which the pregnant woman then presented in an emergency?	Categorical variable
Settlement type of place of residence	Type of settlement the woman lives: urban, suburban, or rural, as defined by the Lagos State Ministry of Land and Housing	Categorical variable
Weekend travel to facility	Did the pregnant woman travel to deliver in a health facility during the weekend?	Yes or no
Period of day of travel to facility	Period of the day pregnant woman presented at the hospital	Categorial variable
Referral	Referred from one health facility to one of the hospitals	Yes or no
Type of referral facility	Type of referral facility for those who were referred to the point of care including another hospital (public), another hospital (private), clinic, primary health centre, traditional birth attendant, nursing/maternity home, and non-formal referral centres like religious bodies