Table 3 Median time to FEF and log-rank test for equality of survivor functions among LBW neonates admitted to NICU of Addis Ababa public hospitals, Ethiopia, 2022 (n = 282)

Parity

Primipara

6 (5–7)

2.05

0.15

Multipara

5 (4–6)

Gestational age in weeks

< 28

15 ( only 1 observation)

85

0.00

28–31

12 (9–14)

32–36

5 (5–6)

Term

3 (2–3)

Birth weight in gram

1500–2499

4 (4–5)

37

0.0000

1000–1499

11 (9–12)

< 1000

No any

Age at admission in hour

Within 1 h

7 (5–8)

12.01

0.007

1–6 h

4.5 (4–5)

6–24 h

7 (5–19)

After 24 h

4 (3–6)

Onset of labor

Spontaneous

5 (4–6)

3.82

0.05

Induced

7 (5–8)

Weight for gestational age

SGA

4 (3–6)

4.1

0.04

AGA

6 (5–7)

Apgar score

≤ 3

12

7.2

0.06

4–6

7 (5–10)

≥ 7

5 (4–6)

unknown

6.5 (4–9)

Plurality

Single

5 (5–6)

1.7

0.19

Multiple

6 (4–11)

Hypothermia

Yes

6 (5–6)

6.4

0.01

Respiratory distress

Yes

6 (5–7)

21

0.0000

New diagnosis during follow up

Yes

7 (6–9)

62

0.0000

Hospital acquired infection

Yes

11 (7–16)

22.4

0.0000

Necrotizing enterocolitis

Yes

16 (3 - )

10

0.001

Apnea during follow up

Yes

12 (10–19)

7.4

0.006

Thrombocytopenia in the follow up

Yes

9 (7–11)

17

0.0000

On antibiotics

Yes

6 (5–7)

49.8

0.0000

Respiratory support

Yes

7 (6–8)

64

0.0000

Type of respiratory Support

CPAP

9 (7–11)

17.4

0.000

Intra nasal O2

5 (4–6)

Feeding instruction provided

Yes

5 (5–6)

2.3

0.13

Trophic feeding

Yes

6 (5–7)

25

0.000

Age at trophic feeding initiation in hour

Within 24 h

3 (3–4)

31.92

0.0000

24-48 h

5 (5–7)

48-72 h

8 (6–11)

After 72 h

13 (10–18)

Trophic feeding interval

Every 2-3 h

5 (5–7)

1.2

0.55

Every 3-6 h

7 (5–10)

Above 6 h

5 (5- )

Routine gastric residual evaluation

Yes

9 (7–12)

23.46

0.0000

Milk type at trophic feeding

Human milk

6 (5–7)

8.4

0.015

Formula

4 (3–7)

Mixed

5 (5- )