Table 5.

Performance characteristics of the two predictive items^* for DHT + BPPV in the combined derivation and validation sets

	Sensitivity	Specificity	LR
Positivity of both	0.44 (0.21–0.67)	0.93 (0.90–0.97)	6.81 (5.11–9.10)
Positivity of only one	0.44 (0.21–0.67)	0.64 (0.57–0.71)	1.22 (1.05–1.43)
Positivity of none	0.11 (0–0.26)	0.43 (0.36–0.50)	0.19 (0.08–0.47)

^*Note: These are “duration of dizziness ≤15 seconds” and “onset when turning over in bed.”

Abbreviations: BPPV, benign paroxysmal positional vertigo; DHT+, positive Dix– Hallpike test; LR, likelihood ratio.