Table 2 Diagnostic validity of MCW and PMI at different cut-off values in the diagnosis of Osteoporosis or Osteopenia, showing the area under curve (A_z) values for ROC curves, sensitivity and specificity (with 95% confidence intervals)

A_z(95% CI)

0.7588 (0.4551-1.000)

0.6878 (0.5178–0.8579)

Sensitivity (95% CI)

Specificity (95% CI)

Sensitivity (95% CI)

Specificity (95% CI)

PMI ≤ 0.23

80.00 (37.55–98.97)

85.29 (69.87–93.55)

27.28 (12.50-50.87)

87.71 (65.36–95.02)

PMI ≤ 0.3

80.00 (37.55–98.97)

44.12 (28.88–60.55)

72.22 (49.13–87.50)

57.14 (36.66–75.53)

A_z(95% CI)

0.9000 (0.8008–0.9996)

0.7222 (0.5594–0.8850)

Sensitivity (95% CI)

Specificity (95% CI)

Sensitivity (95% CI)

Specificity (95% CI)

MCW ≤ 8

100.0 (56.55–100.0)

79.41 (63.20-89.65)

50.00 (29.03–70.97)

90.48 (71.09-98-31)

MCW ≤ 10

100.0 (56.55–100.0)

70.59 (53.83–83.17)

61.11 (38.62–79.69)

76.19 (54.91–89.37)