Table 2.

Anthropometric, atopic, and lung function data at 11 years of the study population.

	Term controls (N = 55)	All preterms (n = 55)	PRETERMS NO BPD (N = 50)	Preterms with BPD (N = 5)	P-values terms vs. preterms	P-values BPD vs. no BPD	P-values terms vs. no BPD
Anthropometric data
Age (years)	11.1 ± 0.9	11.0 ± 0.6	11.0 ± 0.6	11.1 ± 0.8	0.81	0.86	0.77
Weight (kg)	43.3 ± 9.7	42.3 ± 10.0	42.4 ± 9.9	41.6 ± 11.9	0.64	0.82	0.81
Height (cm)	148.2 ± 10.7	145.3 ± 8.1	145.3 ± 8.3	145.2 ± 6.6	0.49	0.95	0.50
BMI (kg/m2)	19.6 ± 3.1	19.8 ± 3.4	19.8 ± 3.4	19.5 ± 3.9	0.71	0.77	0.65
Atopic characteristics
EO%	3.1 ± 2.0	3.5 ± 2.5	3.2 ± 2.2	5.1 ± 3.7	0.61	0.36	0.86
SPT positive	32.7%	38.2%	36.0%	60.0%	0.69	0.35	0.83
FeNO (ppb)	10.8 ± 4.1	10.7 ± 5.3	10.4 ± 4.8	14.6 ± 9.5	0.45	0.31	0.39
Lung function
FEV1 Z-score	0.7 ± 0.9	0.5 ± 1.3	0.6 ± 1.3	0.1 ± 1.1	0.49	0.34	0.74
FVC Z-score	0.2 ± 0.6	0.2 ± 1.2	0.2 ± 1.2	−0.1 ± 1.1	0.94	0.41	0.91
FEV1/FVC Z-score	0.7 ± 0.9	0.6 ± 1.0	0.6 ± 1.1	0.4 ± 0.6	0.72	0.62	0.79
FEF75 Z-score	1.3 ± 0.8	1.2 ± 1.1	1.3 ± 1.0	0.6 ± 0.5	0.33	0.09	0.82
FEF25−75 Z-score	0.5 ± 0.7	0.3 ± 0.9	0.3 ± 0.9	−0.1 ± 0.5	0.16	0.16	0.31
sRaw%	169.2 ± 24.9	187.7 ± 48.1	184.4 ± 48.9	219.6 ± 23.4	0.04	0.02	0.16
VR%	106.9 ± 32.6	105.9 ± 54.4	106.2 ± 56.9	103.2 ± 23.3	0.22	0.48	0.19
TLC%	103.9 ± 16.1	98.5 ± 14.9	98.5 ± 15.6	98.4 ± 4.0	0.02	0.33	0.01
Bronchoreversibility	3.6%	9.1%	8.0%	20.0%	0.44	0.39	0.42

Values are percentages for categorical data and mean ± standard deviation for continuous variables.

BPD, bronchopulmonary dysplasia; BMI, body mass index; EO%, serum eosinophils; SPT, skin prick test; FeNO, fractional exhaled nitric oxide; DLCO, carbon monoxide diffusing capacity; FEV₁, forced expiratory volume in the 1st second; FVC, forced vital capacity; FEF₇₅, forced expiratory flow at 75% of FVC; FEF₂₅₋₇₅, forced expiratory flow between 25 and 75% of FVC; sRaw, specific airway resistance; VR, residual volume; TLC, total lung capacity.

The statistical significance level is p < 0.05 and it is indicated in bold.