Table 2 Bivariate and Multivariate Cox-proportional hazard regression for predictors of neonatal mortality among neonates admitted to NICU of WSUTRH, South Ethiopia, 2015–2017

 male

1

1

1

 Female

0.003

0.59 [0.42–0.84]

0.91 [0.64–1.30]

 < 2500 g

<

3.41 [2.46–4.73]

1.32 [0.78–2.25]

 > = 2500 g

< 0.001

1

1

1

 term

1

1

1

 Preterm

< 0.001

3.60 [2.63–4.93]

0.92 [0.48–1.78]

 multiple

<

4.43 [3.24–6.07]

1.80 [1.10–2.94]^*

 Single

0.001

1

1

1

 > 4

1

1

1

 1–3

< 0.001

4.06 [2.42–6.81]

2.76 [1.62–4.71]

 None

< 0.001

12.96 [7.86–21.39]

6.02 [3.52–10.27]**

 primipareous

< 0.001

2.11 [1.58–2.96]

1.19 [0.86–1.66]

 Multipareous

1

1

1

 SVD

1

1

1

 SVD

< 0.001

0.28 [0.15–0.53]

0.39 [0.20–0.75]

 C/S

< 0.001

0.26 [0.15–0.46]

0.34 [0.19–0.61]^**

 Yes

1

1

1

 No

0.021

0.68 [0.49–0.94]

0.83 [0.54–1.28]

 Yes

> 0.99

0.0.98 [0.73–1.36]

–

 No

1

1

 Yes

0.001

1.73 [1.25–2.39]

1.81 [1.24–2.63]^*

 No

1

1

1

 Yes

0.105

0.32 [0.08–1.28]

 No

1

1

–

 Yes

< 0.001

4.60 [3.10–6.82]

2.04 [1.16–3.59]*

 No

1

1

 Yes

0.217

0.74 [0.47–1.19]

 No

1

1

–

 35.5–37.5

1

1

1

 < 35.5

< 0.001

4.75 [3.33–6.78]

1.58 [1.06–2.34]*

 > 37.5

0.343

1.47 [0.66–3.28]

1.58 [0.70–3.59]

 Yes

< 0.001

4.49 [3.10–6.49]

2.28 [1.54–3.38]**

 No

1

1

1

 within 1 h

1

1

1

 after 1 h

< 0.001

7.42 [4.73–11.64]

2.62 [1.60–4.30]**

 Yes

1

1

1

 No

< 0.001

0.27 [0.17–0.43]

0.65 [0.39–1.06]

 Yes

< 0.001

2.22 [1.59–3.09]

0.81 [0.52–1.28]

 No

1

1

–

 Yes

1

1

–

 No

0.93

0.97 [0.63–1.69]

 Yes

0.97

1.01 [0.72–1.40]

 No

1

1

–