Table 1 Demographic characteristics of included patients. Data are shown as median (min-max) or proportions (n (%))

Neonates 0–28 days (n (%))

36 (83.7 %)

Term (n)

26

Preterm (n)

10

Infants 29–70 days (n (%))

7 (16.3 %)

Term (n)

3

Preterm (n)

4

Infants operated in the preterm age (n (%))

–

Gestational age (weeks)

38 (25–41)

Weight (kg)

3.4 (0.8–5.0)

Age at surgery (days)

6 (0–70)

 Male (n (%))

25 (58.1 %)

 Female (n (%))

18 (41.9 %)

 Thoracic (n (%))

2 (4.6 %)

 Abdominal (n (%))

31 (72.1 %)

 Urologic (n (%))

3 (7.0 %)

 Other (n (%))

7 (16.3 %)

 Duration of anesthesia (min)

80 (30–260)