Table 2.

Sensitivity, specificity, positive (PPV) and negative predictive values (NPV) for mild and moderate/severe cognitive impairment, as defined by the MoCA, for different cut-offs on the AMTS

AMTS cut-off	Sensitivity (95% CI)	Specificity (95% CI)	PPV (95% CI)	NPV (95% CI)
Mild cognitive impairment (MoCA <26)
<10	83.4% (76.8–88.8)	72.7% (39.0–94.0)	97.8% (93.8–99.6)	22.9% (10.4–40.1)
<9	61.3% (53.4–68.9)	100% (71.5–100)	100% (96.4–100)	14.9% (7.7–25.0)
<8	44.8% (37.0–52.8)	100% (71.5–100)	100% (95.1–100)	10.9% (5.6–18.7)
<7	35.0% (27.7–42.8)	100% (71.5–100)	100% (93.7–100)	9.4% (4.8–16.2)
<6	20.2% (14.4–27.2)	100% (71.5–100)	100% (89.4–100)	7.8% (4.0–13.5)
Moderate/severe cognitive impairment (MoCA <18)
<10	92.4% (84.9–96.9)	34.1% (24.0–45.4)	61.2% (52.5–69.3)	80.0% (63.1–91.6)
<9	85.9% (77.0–92.3)	74.4% (63.6–83.4)	79.0% (69.7–86.5)	82.4% (71.8–90.3)
<8	72.8% (62.6–81.6)	92.7% (84.8–97.3)	91.8% (83.0–96.9)	75.2% (65.7–83.3)
<7	59.8% (49.0–69.9)	97.6% (91.5–99.7)	96.5% (87.9–99.6)	68.4% (59.1–76.7)
<6	35.9% (26.1–46.5)	100% (95.6–100%)	100% (89.4–100)	58.2% (49.6–66.4)