Figure 2.

Rates of the primary composite and individual study outcomes based on the number of identified disease components. Rates of home pulmonary vasodilator therapy were calculated among 63 survivors; all other outcomes were calculated among 73 classifiable infants. Differences in outcome rates were statistically significant for the primary composite outcome (P = 0.002) and rates of tracheostomy (P < 0.001) by Fisher’s exact test. Rates were not significantly different for death (P = 0.33) or home pulmonary vasodilator therapy (P = 0.06). NICU = neonatal ICU.