Adjusted odds ratios for severe maternal morbidity by ethnic group.

†Body mass index at the time of booking OR = odds ratio aOR = adjusted odds ratio CI = Confidence Interval ANC = Antenatal Care 1 denotes the baseline comparison group the non-white (non-Asian) group included women from any other black background and other ethnic groups such as Hispanics/Latin Americans. Model-1: adjusted for anaemia in current pregnancy, diabetes in current pregnancy, previous pregnancy problems, pre-existing medical problems and parity. Model-2: adjusted for all variables included in model-1, smoking and inadequate utilization of ANC services. Model-3: adjusted for variables included in models 1 and 2 plus socioeconomic status. Model-4: all variables included in models 1, 2 and 3 plus age and BMI.