Table 3.
AUCs, Sensitivity, Specificity and Cut-off Value Using the Parameters of Shedding Hair Number, Percentage of Vellus Hairs and Combining the Two Markers as Suggested by ROC Curve Analysis Between the Groups of AGA and Normal Subjects, TE and Normal Subjects and AGA and TE Patients
| Parameter | AUC (95% CI) | p-value | Cut-off Value | Sensitivity (95% CI) | Specificity (95% CI) | |
|---|---|---|---|---|---|---|
| AGA vs Normal | Shedding hair number | 0.788 (0.715–0.860) | 0.000 | 35.7 | 0.688 (0.578–0.781) | 0.803 (0.696–0.879) |
| Percentage of vellus hairs (%) | 0.937 (0.898–0.976) | 0.000 | 2.9 | 0.844 (0.744–0.917) | 0.915 (0.825–0.968) | |
| Combined double-markers | 0.957 (0.929–0.985) | 0.000 | ||||
| AGA vs TE | Shedding hair number | 0.922 (0.872–0.971) | 0.000 | 68.7 | 0.964 (0.823–0.998) | 0.766 (0.661–0.847) |
| Shedding hair diameter (mm) | 0.963 (0.932–0.994) | 0.000 | 69.9 | 0.964 (0.823–0.998) | 0.870 (0.777–0.928) | |
| Combined double-markers | 0.996 (0.989–1.000) | 0.000 | ||||
| TE vs Normal | Shedding hair number | 0.999 (0.961–1.000) | 0.000 | 53.6 | 1.000 (0.877–1.000) | 0.972 (0.902–0.997) |
Abbreviations: AGA, androgenetic alopecia; TE, telogen effluvium; AUC, area under ROC curve; CI, confidence interval.