. Author manuscript; available in PMC: 2012 Jun 1.

Published in final edited form as: J Neurol Phys Ther. 2011 Jun;35(2):90–97. doi: 10.1097/NPT.0b013e31821a620c

Table 4.

Discriminative properties

Cutoff scores, sensitivity, specificity, likelihood ratios, and post-test probability of being a faller

	Cutoff Score	Sensitivity	Specificity	LR+ (95% CI)	LR− (95%CI)	Post-test probability with test ≤ cutoff value	Post-test probability with test > cutoff value
Mini-BESTest	≤20/32* (63%)	0.88	0.78	4.03 (2.40–6.79)	0.15 (0.05–0.45)	64.7%	6.5%
Mini-BESTest	≤23/32 (72%)	0.96	0.47	1.82 (1.40–2.37)	0.08 (0.01–0.59)	45.3%	3.7%
BESTest	≤69%*	0.84	0.76	3.49 (2.11–5.77)	0.21 (0.09–.52)	61.3%	8.7%
BESTest	≤ 84%	1.00	0.39	1.64 (1.32–2.02)	0.00 (Unable to calculate)	42.7%	0.0%

Pre-test probability for being a faller was 31.3%. The first cutoff value was chosen to *maximize both sensitivity and specificity.

The second cutoff value was chosen by maximizing sensitivity and LR−.

LR+=positive likelihood ratio; LR−=negative likelihood ratio