Table 1 Comparison of baseline patient demographic characteristics between operating room and NICU groups

OR (n = 89)

NICU (n = 100)

Mean (SD)

Mean (SD)

Mean Difference (95% CI)

p-value

Mean Difference (95% CI)

p-value

Mean Difference (95% CI)

p-value

Birthweight (grams)^a

929 (354)

771 (200)

0.23 (0.09, 0.36)

0.001

0.11 (−0.02, 0.23)

0.099

0.13 (0.01, 0.25)

0.032

Gestational Age at Birth (weeks)^a

26.6 (3.0)

25.5 (2.0)

0.07 (0.03, 0.11)

< 0.001

0.03 (0.00, 0.07)

0.066

0.04 (0.00, 0.08)

0.029

Weight at Time of Procedure (grams)^a

1252 (683)

864 (258)

0.30 (0.20, 0.41)

< 0.001

0.05 (0.01, 0.08)

0.016

0.10 (0.01, 0.19)

0.033

CGA at Time of Procedure (weeks)^a

30.6 (4.4)

27.5 (2.2)

3.18 (2.21, 4.16)

< 0.001

0.92 (0.41, 1.42)

< 0.001

1.22 (0.37, 2.06)

0.005

Number of Preoperative Comorbidities

2.94 (1.5)

2.68 (1.3)

0.26 (−0.14, 0.67)

0.201

0.14 (−0.29–0.57)^b

0.518^b

0.07 (−0.37–0.52)

0.742

Inotrope Score^a

2.8 (4.6)

4.9 (9.8)

−0.60 (− 1.06, − 0.14)

0.011

−0.46 (− 0.94, 0.01)

0.057

−0.43 (− 0.90, 0.05)

0.078

OR (n = 89)

NICU (n = 100)

# (%)

# (%)

Odds Ratio (95% CI)

p-value

Odds Ratio (95% CI)

p-value

Odds Ratio (95% CI)

p-value

Number Requiring Inotropes (%)

34 (38%)

39 (39%)

0.73 (0.19, 2.82)

0.650

0.74 (0.18, 3.13)

0.683

0.63 (0.14, 2.80)

0.597

Number of Males (%)

51 (57.3%)

54 (54%)

1.09 (0.45, 2.63)

0.845

1.27 (0.51, 3.17)

0.613

1.58 (0.55, 4.57)

0.687

Ventilatory Requirements Prior to Procedure

0.001

0.005

0.006

Spontaneous

18 (20.2%)

1 (1%)

25.11 (3.23, 195.07)

0.002

10.38 (1.22, 88.32)

0.032

9.19 (1.09, 77.72)

0.042

NIMV

4 (4.5%)

4 (4%)

1.13 (0.27, 4.70)

0.866

1.10 (0.23, 5.17)

0.908

0.83 (0.17, 4.02)

0.811

Conventional

66 (74.2%)

46 (46%)

3.37 (1.81, 6.26)

< 0.001

5.53 (2.65, 11.51)

< 0.001

4.98 (2.38, 10.39)

< 0.001

HFOV/HFJV

1 (1.1%)

49 (49%)

0.01 (0.00, 0.09)

< 0.001

0.01 (0.00, 0.11)

< 0.001

0.02 (0.00, 0.12)

< 0.001