Table 3.

Pearson correlation and ICC between the spirometric values obtained with the two spirometers, for each of the four patient subsets, namely: asthma, COPD, restrictive and normal

		Pearson correlation	ICC
Asthma	FEV1(L)	0.979	0.979
	FVC (L)	0.972	0.969
	FEV1/FVC	0.906	0.898
	FEF25–75%	0.943	0.943
	PEF (L/sec)	0.965	0.963
	MEF25%	0.836	0.835
	MEF50%	0.930	0.929
	MEF75%	0.963	0.959
COPD	FEV1(L)	0.968	0.967
	FVC (L)	0.924	0.914
	FEV1/FVC	0.914	0.916
	FEF25–75%	0.960	0.96
	PEF (L/sec)	0.926	0.925
	MEF25%	0.915	0.89
	MEF50%	0.961	0.959
	MEF75%	0.950	0.949
Restrictive	FEV1(L)	0.946	0.946
	FVC (L)	0.947	0.942
	FEV1/FVC	0.943	0.937
	FEF25–75%	0.903	0.895
	PEF (L/sec)	0.850	0.85
	MEF25%	0.730	0.725
	MEF50%	0.912	0.905
	MEF75%	0.887	0.884
Normal	FEV1(L)	0.971	0.968
	FVC (L)	0.975	0.974
	FEV1/FVC	0.900	0.899
	FEF25–75%	0.902	0.898
	PEF (L/sec)	0.914	0.914
	MEF25%	0.914	0.908
	MEF50%	0.857	0.856
	MEF75%	0.918	0.917

*for all metrics p < 0.001