Plurality (651.x or V27.2–V27.7) and smoking (305.1 or 649.0) were ascertained during any inpatient or outpatient encounter in the 40 weeks prior to the delivery hospitalization.
Plurality (651.x orV27.2–V27.7) and smoking (305.1 or 649.0) were ascertainedduring any inpatient or outpatient encounter in the40 weeks prior to the delivery hospitalization.