Table 2.

Sensitivity analysis of various nailfold capillary parameters

	Cut-off value	Sensitivity (%)	Specificity (%)	Area under the ROC curve	95% CI
Number of capillaries/mm	8.75	76.9	77.1	0.846	0.753 to 0.939
Output limb width, μm	16.72	80.0	74.4	0.866	0.781 to 0.950
Input limb width, μm	13.73	77.1	74.7	0.782	0.669 to 0.895
Apical width, μm	18.51	80.0	79.5	0.823	0.714 to 0.932
Capillary limb length, μm	165.37	65.7	56.4	0.686	0.561 to 0.812
Capillary total width, μm	44.46	62.9	53.8	0.704	0.580 to 0.829
Ratio of output limb and input limb	1.29	74.0	71.8	0.775	0.669 to 0.881

ROC, receiver operating characteristic.