Table 2. Pearson's correlation coefficients between spirometric parameters and height, weight, age in the training subset^*.

Variables	Age (year)	Height (cm)	Weight(Kg)
Boys (n = 1048)
FVC (L)	0.745*	0.808*	0.729*
FEV1 (L)	0.776*	0.829*	0.732*
PEF (L/s)	0.709*	0.717*	0.623*
MMEF (L/s)	0.715*	0.721*	0.620*
Girls (n = 1030)
FVC (L)	0.684*	0.769*	0.701*
FEV1 (L)	0.697*	0.767*	0.683*
PEF (L/s)	0.539*	0.590*	0.542*
MMEF (L/s)	0.596*	0.633*	0.576*

^* P<0.001 for all correlation coefficients. FVC, forced vital capacity; FEV1, forced expiratory volume in one second; PEF, peak expiratory flow; MMEF, maximal mid-expiratory flow.