Received caffeine citrate

P value•

Yes

No

Mean

SD

Mean

SD

PH (on admission)

7.27

0.05

7.24

0.05

0.005

PO₂ (on admission)

37.80

9.43

31.74

10.30

0.003

PCO₂ (on admission)

44.78

11.38

51.10

7.40

0.001

HCO₃ (on admission)

20.80

3.43

21.52

2.79

0.252

PH (Follow up)

7.36

0.05

7.31

0.04

<0.001

PCO₂ (Follow up)

39.46

3.47

45.36

7.28

<0.001

PO₂ (Follow up)

40.84

7.94

37.12

7.42

0.017

HCO₃ (Follow up)

22.98

1.90

24.06

1.90

0.005