Table 2.

Spirometry values (expressed as percent of predicted values and as Z-score) of the recruited subjects.

	% Pred *	Z-Score *
FEV1	98.38 (94.38–104.39)	−0.14 (−0.48–0.37)
FVC	93.35 (89.56–103.56)	−0,51 (−0.89–0.3)
FEV1/FVC	105.34 (100.06–107.46)	0.9 (0.01–1.28)
FEF25-75	105.26 (92.35–117.33)	0.24 (0.35–0.77)

* Data are presented as median and interquartile range.