Table 4 Gompertz hazard model for predictors of time to death among preterm neonates admitted in NICU at University of Gondar specialized referral Hospital from January 2016 to March 2018 (n = 516)

 Gondar Town

1

1

 Out of Gondar Town

1.51 (1.05, 2.19)

1.25 (0.84, 1.86)

 Home

2.14 (1.08, 4.23)

2.29 (1.05, 4.98)^*

 Health center

1.30 (0.89, 1.90)

1.09 (0.71, 1.68)

 Hospital

1

1

 No

1

 Yes

1.71 (1.21, 2.40)

1.57 (1.10, 2.26)^*

 No

1

1

 Yes

1.55 (1.10, 2.18)

1.26 (0.87, 1.83)

 No

1

1

 Yes

1.51 (1.02, 2.24)

1.39 (0.91, 2.12)

 Singleton

1.71 (1.18, 2.46)

2.35 (1.58, 3.50)^**

 Multiple

1

1

 Gestational age

0.76 (0.70, 0.82)

0.82 (0.74, 0.91)^**

 Small

1.56 (1.10, 2.21)

1.65 (1.12, 2.43)^*

 Appropriate

1

1

 No

1

1

 Yes

0.41 (0.30, 0.57)

0.57 (0.39, 0.83)^*

 No

1

1

 Yes

4.38 (2.85, 6.74)

3.02 (1.86, 4.88)^**

 No

1

1

 Yes

1.68 (1.00, 2.82)

1.18 (0.63, 2.21)

 No

1

1

 Yes

1.96 (1.41, 2.71)

1.33 (0.93, 1.90)

 No

1

1

 Yes

2.18 (1.58 3.03)

1.55 (1.09, 2.20)^*

 No

1

1

 Yes

1.68 (1.04, 2.72)

1.46 (0.88, 2.42)

 No

1

1

 Yes

1.35 (0.96, 1.90)

1.62 (1.12, 2.35)^*

 No

1

1

 Yes

0.25 (0.12, 0.53)

0.23 (0.10, 0.51)^**

 No

1

1

 Yes

2.10 (1.49, 2.95)

1.75 (1.21, 2.54)^*

 < 2000

1.36 (0.95, 1.96)

0.64 (0.41, 1.00)

 > =2000

1

1

Neonatal temperature measured within 1 h of admission in ⁰C

0.79 (0.71, 0.89)

0.95 (0.82, 1.08)