Table 4 Sensitivity and specificity of the Velocity field diagram and Timed-up-and-go-test in fall prediction among fallers (n = 280) and non-fallers (n = 220)
95%CI | ||||||
|---|---|---|---|---|---|---|
Variable | Non-Fallers n(%) | Fallers (gold standard) F(%) | Estimated values | Lower limit | Upper limit | Diff CI |
No. of participants that tested positive | ||||||
●VFD | 160(72.7) | 200(71.4) | ||||
●TUG | 90(40.9) | 110(39.3) | ||||
No. of participants that tested negative | ||||||
●VFD | 60(27.3) | 80(28.6) | ||||
●TUG | 130(59.1) | 170(60.7) | ||||
Prevalence | 0.56 | 0.41 | 0.70 | 0.29 | ||
Sensitivity | ||||||
●VFD | 0.71 | 0.52 | 0.85 | 0.37 | ||
●TUG | 0.39 | 0.22 | 0.59 | 0.37 | ||
Specificity | ||||||
●VFD | 0.27 | 0.20 | 0.57 | 0.37 | ||
●TUG | 0.59 | 0.37 | 0.79 | 0.42 | ||
PPV | ||||||
●VFD | 0.55 | 0.56 | 0.83 | 0.26 | ||
●TUG) | 0.55 | 0.27 | 0.55 | 0.28 | ||
NPV | ||||||
●VFD | 0.42 | 0.19 | 0.71 | 0.52 | ||
●TUG | 0.43 | 0.26 | 0.62 | 0.36 | ||
likelihood Ratios: | ||||||
Positive[C] | ||||||
●VFD | 1.12 | 0.69 | 1.39 | 0.70 | ||
●TUG | 0.79 | 0.49 | 1.90 | 1.41 | ||
Negative[C] | ||||||
●VFD | 0.79 | 0.46 | 2.30 | 0.84 | ||
●TUG | 1.21 | 0.72 | 1.47 | 0.75 | ||