Table 4 Logistic regression analysis of risk factors associated with the need for mechanical ventilation within 72 h after extubation

 lung recruitment

ref.

–

ref.

–

 Control

2.08 (1.09 to 3.95)

0.026

2.17 (1.13 to 4.18)

0.021

 Gestational age, week

0.84 (0.70 to 1.00)

0.055

 Birth weight, kg

0.51 (0.16 to 1.66)

0.263

 Male

ref.

–

 Female

0.72 (0.37 to 1.39)

0.322

 NSD

ref.

–

 CS

1.14 (0.59 to 2.23)

0.692

 Antenatal steroids, yes

0.59 (0.31 to 1.12)

0.105

 Gestational diabetes mellitus, yes

0.98 (0.42 to 2.29)

0.955

 Amniotic fluid pollution, yes

0.95 (0.32 to 2.83)

0.923

 Intrauterine infection, yes

1.53 (0.80 to 2.94)

0.198

 Hypertension, yes

2.28 (1.11 to 4.71)

0.026

2.41 (1.15 to 5.05)

0.020

 Premature rupture of membranes, yes

0.85 (0.38 to 1.91)

0.699

 No

ref.

–

 Yes

1.91 (0.88 to 4.16)

0.102

 Apgar - 1 min

0.87 (0.74 to 1.02)

0.076

 Apgar - 5 min

0.80 (0.55 to 1.18)

0.261

 Apgar - 10 min

0.61 (0.36 to 1.03)

0.066