Table 1 Baseline characteristics of included patients *Values expressed as medians (interquartile range)

Birth weight, grams*

1065 (731.5, 2043)

904 (689, 1535.5)

Gestation, weeks*

28 (26, 33)

27 (26, 30)

Gender male/female, n

11/6

9/8

Age at randomization, days*

3 (0.61, 16)

8 (0.63, 13)

Primary intubation/failed extubation, n

7

7

Change of endotracheal tube, n

10

10

Baseline HR, bpm*

152 (142.5, 157.5)

161 (151.5, 166.5)

Baseline Sp0_2, %*

94 (92.5, 95)

94 (92.5, 98)

Baseline BP, mm Hg*

38.5 (35.25, 44.75)

37.5 (33.25, 44.5)

Baseline fi0_2, %*

40 (27, 45)

32 (25, 41.25)

Experienced intubator, n

9

7

Junior intubator, n

8

10