Table 3
Frequency of outcomes: BPD, mortality, mortality or BPD
2006 (%)
2010 (%)
p Value
Mortality
16.5
13.6
0.05
BPD
22.6
20.7
0.32
Mortality or BPD
33.2
29.4
0.04
BPD, bronchopulmonary dysplasia.