Table 5 Characteristics of infants that never required respiratory support

Number of studied infants

60

Gestational age (weeks)

37

(30-40)

Birth weight (g)

2845

(1260-3820)

Gender (male)

36

(60.0)

Preterm

28

(46.7)

At the time of measurement

Postnatal age (days)

6.5

(1-31)

Postmenstrual age (PMA) (weeks)

37.6

(32.7-41.4)

Preterm (PMA<37 weeks)

22

(36.7)

Weight (g)

2765

(1880-3680)

cACE activity (U/L)

44.3

(16.7-89.0)

Pi_max (cmH₂O)

64.3

(36.9-91.8)

Pi_max/weight (cmH₂O/kg)

23.9

(14.5-47.1)

PTImus

0.061

(0.028-0.117)