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. 2022 Aug 11;22:658. doi: 10.1186/s12877-022-03282-2

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