Table 2 Comparison of APrON and AOB selection criteria
Selection criteria | APrON | AOB-OC | AOB-PC |
|---|---|---|---|
Maternal age | ≥16 years | ≥18 years | ≥18 years |
Language | Able to complete questionnaires in English | Able to complete questionnaires in English | Able to complete questionnaires in English |
Gestational age at enrollment | <27 weeks | <24 wks | <17wks |
Specific criteria | Not planning to move out of the city within 6 months of inclusion into study | Receiving prenatal care | Nulliparous or primiparous OR personal or familial history of preterm birth; |
Receiving prenatal care; | |||
Singleton pregnancy |