Table 2 PtCO₂ by time and randomised group

0

38·0 (7·7)

37·2 (6·8)

5

39·9 (8·3)

37·0 (7·1)

2·10 (1·49 to 2·71)

< 0·001

6

40·1 (8·4)

37·0 (7·1)

2·24 (1·63 to 2·86)

< 0·001

10

40·8 (8·6)

37·2 (6·9)

2·76 (2·15 to 3·37)

< 0·001

15

41·1 (8·8)

37·3 (6·9)

2·97 (2·36 to 3·59)

< 0·001

20

38·6 (7·8)

37·0 (6·4)^a

0·86 (0·25 to 1·48)

0·006

25

40·5 (8·3)

36·8 (6·8)^b

2·77 (2·15 to 3·39)

< 0·001

26

40·6 (8·4)

36·8 (6·8)^b

2·88 (2·26 to 3·50)

< 0·001

30

41·1 (8·5)

37·1 (6·6)^a

3·20 (2·59 to 3·82)

< 0·001

35

41·3 (8·6)

37·3 (6·5)^a

3·31 (2·70 to 3·93)

< 0·001

40

39·0 (8·1)^a

37·0 (6·7)^a

1·14 (0·52 to 1·76)

< 0·001

45

38·1 (7·5)

36·7 (6·3)^a

0·61 (− 0·01 to 1·22)

0·053

50

37·9 (7·4)

36·6 (6·2)^a

0·59 (− 0·02 to 1·21)

0·059

55

37·9 (7·3)

36·6 (6·0)^a

0·51 (− 0·10 to 1·13)

0·1

60

37·9 (7·3)

36·7 (6·1)^a

0·51 (− 0·10 to 1·13)

0·1

65

38·1 (7·2)

36·7 (6·1)^a

0·63 (0·01 to 1·25)

0·045

70

37·5 (6·5)^a

36·7 (6·1)^a

0·60 (− 0·02 to 1·21)

0·059

75

37·8 (6·8)

36·7 (6·1)^a

0·42 (− 0·20 to 1·03)

0·18

80

37·9 (6·9)

36·7 (6·3)^a

0·40 (− 0·21 to 1·02)

0·2