Table 1 Demographic and baseline characteristics^a

Sex (Male/Female)

13/10

12/15

0.395

GA at birth (weeks; mean ± SD)

28.8 ± 3.1

29.5 ± 2.6

0.381

BW at birth (gram; mean ± SD)

1295 ± 234

1313 ± 251

0.795

Age at surgery (days; mean ± SD)

23.1 ± 7.3

24.9 ± 7.5

0.385

BW at surgery (kg; mean ± SD)

1608 ± 290

1630 ± 322

0.802

LA/AO ratio (mean ± SD)

1.66 ± 0.10

1.69 ± 0.08

0.158

PDA size (mm)

2.7 ± 0.3

2.5 ± 0.2

0.104

Pre-op pulmonary hypertension, n (%)

17 (74)

21 (78)

0.712

Prior ibuprofen treatment, n (%)

21 (91)

23 (85)

0.674

Pre-op invasive ventilation, n (%)

20 (87)

25 (93)

0.651

Pre-op oxygen index (mean ± SD)

9.3 ± 4.0

8.9 ± 3.7

0.712

Pre-op PIP (cmH₂O; mean ± SD)

20.8 ± 3.6

19.5 ± 3.3

0.202

Pre-op PEEP (cmH₂O; mean ± SD)

4.8 ± 1.0

4.6 ± 1.1

0.513

Pre-op MAP (cmH₂O; mean ± SD)

11.5 ± 3.0

10.7 ± 2.5

0.277

Pre-op FiO₂, mean ± SD

0.35 ± 0.11

0.38 ± 0.13

0.369

Pre-op NRDS, n (%)

19 (83)

24 (89)

0.689

Pre-op IVH, n (%)

8 (35)

9 (33)

1.000