Table 1 Participants’ characteristics

Male (n (%))

12 (70%)

11 (65%)

Age (years)

15.7±6.7

15.6±7.1

0.92

Weight (kg)

48.0±17.1

47.4 ±19.3

0.02

Height (cm)

152.1±21.1

153.7 ±21.0

0.20

FEV1 (%pred)

z-score

90.5 ±14.0

−0.44 (0.9)

108.0±8.7

0.45 (0.9)

0.002

FVC (%pred)

z-score

88.4±19.3

-0.45 (0.7)

107.6±6.9

0.59 (0.9)

0.001

Reff (%pred)

88.8±34.3

78.3±36.1

0.39

RV/TLC(%pred)

z-score

99.4±25.6

0.84 (0.7)

107.0±31.7

0.84 (1.76)

0.53

DLCO (%pred)

z-score

75.3±23.6

104.9±12.8

0.27 (0.86)

0.005