Table 3.

Sensitivity and specificity analysis of the cut-offs proposed for fall risk assessment.

MB			Turning duration
Cut-off: 0.06 logits (14)			Cut-off: 3.80 s
	Fallers	Non-fallers		Fallers	Non-fallers
Positives	24	18	Positives	20	17
Negatives	58	114	Negatives	62	115
Sn: 0.29; Sp: 0.86			Sn: 0.24; Sp: 0.87
Cut-off: 2.94 logits (25)			Cut-off: 1.91 s
	Fallers	Non-fallers		Fallers	Non-fallers
Positives	75	106	Positives	79	111
Negatives	7	26	Negatives	3	21
Sn: 0.92; Sp: 0.20			Sn: 0.96; Sp: 0.16

MB, Mini-BESTest scale; Sn, sensitivity; Sp, specificity. For the MB scale, the cut-offs are provided as interval measures expressed in logits and total ordinal scores (in brackets). Turning duration cut-offs are provided back-transformed as in Figure 4. Participants are classified as fallers or non-fallers and as positive or negative to tests. Hence, fallers testing positive are true positives, non-fallers testing negative are true negatives, fallers testing negative are false negatives, and non-fallers testing positive are false positives. The MB scale and the Turning duration are used as tests to detect the patient who will fall, i.e., the test is considered positive when the measure flags a person as a future faller. Therefore, the MB is positive if its measure (or ordinal score) is below the cut-off value. The turning duration is positive if above the cut-off.