Table 6.

Sensitivity and Specificity of the TUG and VFD for different thresholds

Screen tool	Sensitivity	Specificity	PPV	NPV	Accuracy
TUG cutoff time (s)
≤ 11.77	1.00[0.83, 1.00]	0.09[0.02, 0.29]	0.52	1.00	0.60
≤ 12.88	0.86[0.68, 0.95]	0.36[0.20, 0.57]	0.57	0.72	0.64
≤ 13.25	0.54[0.36, 0.70]	0.36[0.20, 0.57]	0.46	0.44	0.46
≤ 13.72	0.36[0.21, 0.54]	0.64[0.43, 0.80]	0.50	0.50	0.48
≤ 13.98	0.18[0.08, 0.36]	0.82[0.61, 0.93]	0.50	0.50	0.46
VFD cutoff values for E1
≤ 1.80	1.00[0.88, 1.00]	0.00[0.00, 0.18]	0.50	0.00	0.56
≤ 2.57	0.86[9.68, 0.95]	0.23[0.01, 0.44]	0.51	0.57	0.56
≤ 2.93	0.75[0.56, 0.88]	0.32[0.16, 0.53]	0.52	0.56	0.56
≤ 3.68	0.61[0.42, 0.76]	0.82[0.61, 0.93]	0.77	0.68	0.70
≤ 4.05	0.39[0.24, 0.58]	1.00[0.82, 1.00]	1.00	0.62	0.66
≤ 4.29	0.18[0.08, 0.36]	1.00[0.82, 1.00]	1.00	0.55	0.54

Note. The values in brackets represent 95% confidence intervals. TUG Timed Up and Go Test, VFD Velocity field diagram