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