Table 5 Univariate and multivariate Cox regression analysis for the risk factors for mortality among preterm neonates

Use of ACS

 Yes

0.27

0.09 – 0.80

0.018

0.41

0.13 – 1.26

0.118

 No

Ref

 Birth weight

0.99

0.997 – 0.999

< 0.001

0.999

0.998 – 1.00

0.131

APGAR Score (1 min)

 < 7

1.91

0.82 – 4.42

0.132

1.46

0.61 – 3.47

0.397

 ≥ 7

Ref

APGAR Score (5 min)

 < 7

2.09

0.62 – 7.11

0.236

 ≥ 7

Ref

Gravidity

 Primagravida

1.46

0.64 – 3.35

0.369

 Multigravida

Ref

RDS*

 No

0.01

< 0.01 – 0.29

0.008

 Yes

Ref

Maternal NCDs

 Yes

0.75

0.33 – 1.72

0.499

 No

Ref

Mode of delivery

 Caesarean

0.56

0.22 – 1.42

0.223

 SVD

Ref

 Gestational age

0.59

0.47 – 0.76

< 0.001

0.70

0.53 – 0.92

0.011