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Table 3 the comparison of frequency of primary and secondary outcome between two groups in term of birth weight and gestational age subgroups

From: The impact of combined administration of surfactant and intratracheal budesonide compared to surfactant alone on bronchopulmonary dysplasia (BPD) and mortality rate in preterm infants with respiratory distress syndrome: a single-blind randomized clinical trial

Birth weight

Variables

Surfactant(n = 67)

Surfactant + Budesonide (n = 67)

P value

Gestational age

Surfactant(n = 67)

Surfactant + Budesonide (n = 67)

P value

Frequency (%)

Frequency (%)

Frequency (%)

Frequency (%)

< 1500 gr

N G1= 30 people

N G2=40 people

Death

Yes

17(42.5)

9(30)

0.284

Chi-square values = 1.14

< 30 weeks

N G1= 24 people

N G2=16

17(70.8)

5(31.3)

0.014

Chi-square values = 6.07

**RR = 0.72, CI 95% (0.39, 1.33)

RR = 0.37, CI 95% (0.15, 0.87)

BPD

Yes

10(25)

8(26.7)

0.875

Chi-square values = 0.02

5(20.8)

7(43.8)

0.166

Chi-square values = 2.40

RR = 1.05, CI 95% (0.57, 1.92)

RR = 1.81, CI 95% (0.88, 3.72)

Pulmonary Hemorrhage

Yes

18(45)

7(23.3)

0.061

Chi-square values = 3.50

16(66.7)

3(18.8)

0.003

Chi-square values = 8.83

RR = 0.54, CI 95% (0.27, 1.09)

RR = 0.25, CI 95% (0.08, 0.76)

Pneumothorax

Yes

5(12.5)

7(23.3)

0.234

Chi-square values = 1.41

5(20.8)

4(25)

1

Chi-square values = 0.09

RR = 1.47, CI 95% (0.82, 2.61)

RR = 1.14, CI 95% (0.48, 2.69)

Intraventricular Hemorrhage

Yes

14(35)

8(26.7)

0.457

Chi-square values = 0.55

10(41.7)

7(43.8)

0.896

Chi-square values = 0.01

RR = 0.79, CI 95% (0.42, 1.49)

RR = 1.05, CI 95% (0.49, 2.25)

Second Dose Surfactant

Yes

35(87.5)

9(30)

0.001

Chi-square values = 24.27

23(95.8)

5(31.3)

0.001

Chi-square values = 19.06

RR = 0.25, CI 95% (0.13, 0.46)

RR = 0.19, CI 95% (0.08, 0.43)

1500–2000 gr

N G1= 22 people

N G2=13 people

Death

Yes

2(15.4)

1(4.5)

0.541

Chi-square values = 1.22

people30-34 weeks

N G1= 39 people

N G2=32 people

2(6.3)

4(10.3)

0.683

Chi-square values = 0.36

RR = 0.50, CI 95% (0.10, 2.56)

RR = 1.23, CI 95% (0.67, 2.27)

BPD

Yes

0

0

-

5(15.6)

1(2.6)

0.084

Chi-square values = 3.87

RR = 0.28, CI 95% (0.04, 1.72)

Pulmonary Hemorrhage

Yes

3(23.1)

1(4.5)

0.134

Chi-square values = 2.77

5(15.6)

4(10.3

0.722

Chi-square values = 0.45

RR = 0.36, CI 95% (0.06, 2.05)

RR = 0.78, CI 95% (0.36, 1.68)

Pneumothorax

Yes

1(7.7)

0

0.371

Chi-square values = 1.74

1(3.1)

3(7.7)

0.746

Chi-square values = 0.69

RR = 1.39, CI 95% (0.76, 2.56)

Intraventricular Hemorrhage

Yes

2(15.4)

1(4.5)

0.541

Chi-square values = 1.22

10(41.7)

7(43.8)

0.196

Chi-square values = 3.26

RR = 0.50, CI 95% (0.50, 2.56)

RR = 0.42, CI 95% (0.12, 1.42)

Second Dose Surfactant

Yes

5(38.5)

2(9.1)

0.075

Chi-square values = 4.40

23(95.8)

5(31.3)

0.001

Chi-square values = 11.43

RR = 0.40, CI 95% (0.12, 1.32)

RR = 0.37, CI 95% (0.18, 0.77)

2000–2500 gr

N G1= 15 people

N G2=14 people

Death

Yes

0

0

0

34–37 weeks

N G1= 12 people

N G2=11 people

0

1(8.3)

1

Chi-square values = 0.95

BPD

Yes

0

0

0

0

0

-

Pulmonary Hemorrhage

Yes

0

0

0

0

1(8.3)

1

Chi-square values = 0.95

Pneumothorax

Yes

0

0

0

0

0

-

Intraventricular Hemorrhage

Yes

0

0

0

0

0

-

Second Dose Surfactant

Yes

1(7.1)

2(13.3)

1

Chi-square values = 0.29

1(19.1)

2(16.7)

1

Chi-square values = 0.29

RR = 1.33, CI 95% (0.54, 3.23)

RR = 1.33, CI 95% (0.53, 3.32)

  1. *chi-square test and fisher exact test, ** Risk Ratio (RR)