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Table 2 Adjusted associations between risk factors of interest and severe maternal morbidity, California, 2007–2014, n = 3,556,206

From: The contribution of maternal characteristics and cesarean delivery to an increasing trend of severe maternal morbidity

Risk factor Odds ratio (95% CI) for severe maternal morbidity Population attributable risk percentage (95% CI) for severe maternal morbidity
Advanced maternal age 1.49 (1.45, 1.52) 7.5 (6.6, 8.4)
Pre-pregnancy obesity 0.99 (0.97, 1.01) −0.2 (−1.2, 0.8)
Pre-pregnancy comorbidity 2.22 (2.16, 2.28) 7.8 (6.9, 8.6)
Cesarean delivery 2.66 (2.61, 2.73) 37.1 (36.0, 38.0)
  1. CI, confidence interval
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