Additional file 3: of The contribution of maternal characteristics and cesarean delivery to an increasing trend of severe maternal morbidity LeonardStephanie MainElliott CarmichaelSuzan 2019 Table S3. Observed and predicted severe maternal morbidity prevalence per 100 live births (95% confidence intervals), California, 2007–2014. The studied risk factors were related to the prevalence of SMM, but not its increase over time. (DOCX 21 kb)