In most instances, rates of ruptured uterus and unplanned hysterectomy
were higher for repeat cesarean deliveries than for primary cesarean deliveries for the racial and ethnic groups. The
exceptions were ruptured uterus for Hispanic women (44.4 for
primary compared with 51.2 for repeat cesarean, not significantly
different) and unplanned hysterectomy for non-Hispanic Asian
women (110.9 for primary compared with 124.5 for repeat
cesarean, not significantly different).