Table 4.

Predicted mean values ^a of lung function from 11 to 19 years of age.

	CV			HFO
	11 years	19 years	Difference (19–11 years)	11 years	19 years	Difference (19–11 years)
FEF75 z‐score	−1.53	−1.41	0.12	−1.25	−1.26	−0.01
FEF50 z‐score	−1.78	−1.44	0.34	−1.48	−1.20	0.28
FEF25 z‐score	−1.52	−0.95	0.57	−1.27	−0.80	0.47
FEV1 z‐score	−1.23	−1.44	−0.21	−0.91	−1.26	−0.35
FVC z‐score	−0.45	−0.20	0.25	−0.37	−0.01	0.36
FEV1/FVC z‐score	−2.43	−1.77	0.66	−1.73	−1.85	−0.12
DLCO z‐score	−1.32	−1.52	−0.20	−1.02	−1.38	−0.36
FRCpleth z‐score	−0.43	0.52	0.95	−0.61	0.61	1.21
FRCHe z‐score	−0.56	0.48	1.04	−0.75	0.62	1.37

Abbreviations: CI, confidence interval; CV, conventional ventilation; DLCO, diffusion capacity of the lungs for carbon monoxide; FEF, forced expiratory flow; FEV₁, forced expiratory volume in 1 s; FVC, forced vital capacity; FRC, functional residual capacity; HFO, high‐frequency oscillation.

^aAdjusted for child's birthweight, gestational age, and surfactant given from the random effects regression model using all available data (319 at age 11–14 and 159 at age 16–19 years).