Measure	Data source
Delivery decision making scale	1-month postpartum interview
Race/ethnicity	Baseline interview
Education	Baseline interview
Insurance type	Hospital discharge record
Labor induction	1-month postpartum interview
Cesarean delivery	1-month postpartum interview
Age	Baseline interview
Partnership status	Baseline interview
Nativity	Baseline interview
Rural zip code	Baseline interview
Diabetes	Baseline interview
Hypertension	Baseline interview
Obesity	Baseline interview
Labor support from a doula	1-month postpartum interview
Baby's gestational age at birth	Birth certificate
Delivery mode alignment with prenatal preferences	Baseline interview and 1-month postpartum interview