Table 1 Neonatal characteristics of all adolescents and those with isolated and non-isolated Pierre Robin sequence (PRS)

Term (weeks), mean (SD)

39.1 (1.4)

39.1 (1.4)

39.5 (1.7)

Birth weight (g), mean (SD)

3303 (532)

3248 (495)

3550 (637)

Birth length (cm), mean (SD)

49.4 (2.4)

49.4 (2.1)

49.7 (3.6)

Head circumference (cm), mean (SD)

34.6 (1.6)

34.4 (1.4)

35.7 (2.3)

Cleft palate width

 Velar cleft

5

4

1

 Narrow or incomplete

6

6

 Large or complete

61

49

12

Neonatal retrognathia severity

 Minor

19

17

2

 Mild

31

25

6

 Major

22

17

5

Functional severity grade

 1

26

22

4

 2

33

30

3

 3

13

7

6

Tracheostomy

9

6

3

Secondary pharyngoplasty

18

16

2

Fistula repair

13

11

2