Figure 6

Crude and adjusted primary CS proportions for 27 hospitals ^a ; provide a comparison between two risk-adjustment models, one based on the standard definition and the other based on the modified definition of malposition and malpresentation of the fetus ^b (2010). ^aThis Figure was restricted to focus on the 27 maternity units with HFH prevalence greater than the 95^th percentile. ^bStandard definition of malposition and malpresentation of the fetus: ICD-9-CM 652. Modified definition: ICD-9-CM 652, excluding 652.5 (High fetal head at term).