Table 6. Diagnostic accuracy of the fractional-order parameters in the detection of respiratory alterations in patients with sickle cell disease.

Values obtained in patients with normal values in the spirometric exam and abnormal spirometry.

	FrL	α	C	β	G	H	η
Normal exam
AUC	0.910	0.786	0.763	0.967	0.743	0.892	0.967
Se (%)	90.48	66.67	76.19	95.24	76.19	90.48	95.24
Sp (%)	91.30	82.61	65.22	95.65	69.57	91.30	95.65
Cut-off	>0.137	≤0.606	>0.033	≤0.623	>14.098	≤25.06	>0.599
Abnormal exam
AUC	0.918	0.731	0.624	0.989	0.859	0.850	0.989
Se (%)	87.50	58.33	66.67	100.00	70.83	79.17	100.00
Sp (%)	91.30	86.96	65.22	95.65	95.65	91.30	95.65
Cut-off	>0.137	≤0.598	>0.033	≤0.623	>18.341	≤24.931	>0.599

AUC: area under the receiver-operator curve; Se: sensibility; Sp: specificity.