Objective
To determine the incidence and risk factors for intensive care unit (ICU) readmission among preterm infants who required mechanical ventilation at birth.
Study design
We studied preterm newborns (birth weight 500–1250 grams) who required mechanical ventilation at birth and were enrolled in a multicenter trial of inhaled nitric oxide therapy. Patients were assessed up to 4.5 years of age via annual in-person evaluations and structured telephone interviews. Univariate and multivariable analyses of baseline and birth hospitalization predictors of ICU readmission were performed.
Results
Of 512 subjects providing follow-up data, 58% were readmitted to the hospital (51% of these had multiple readmissions, averaging 3.9 readmissions per subject), 19% were readmitted to an ICU, and 12% required additional mechanical ventilation support. In univariate analyses, ICU readmission was more common among males (OR 2.01; 95% CI, 1.27–3.18), infants with grade 3–4 intracranial hemorrhage (OR 2.13; 95% CI, 1.23–3.69), increasing duration of birth hospitalization (OR 1.01 per day; 95% CI: 1.00–1.02), and prolonged oxygen therapy (OR 1.01 per day; 95% CI 1.00–1.01). In the first year after birth hospitalization, children readmitted to an ICU incurred higher health care costs (median $69,700 vs. $30,200 for subjects admitted to the ward and $9600 for subjects never admitted).
Conclusions
Small preterm infants who were mechanically ventilated at birth have substantial risk for readmission to an ICU and late mechanical ventilation, using extensive health care resources and incurring high costs.