Highlight
• In a nationwide cohort of 39,413 infants born at 22–31 weeks’ gestation and discharged home, 67% had at least one hospitalization before age 2.
• Hospitalization frequency and total days hospitalized rose with decreasing gestational age (58.8% at 31 weeks to 87.0% at <24 weeks) and with the presence and number of neonatal morbidities.
