BMC Neurology

Table 1 Sensitivity and specificity of the items included in the diagnostic indices.

From: Diagnostic indices for vertiginous diseases

	PPV		BPPV		MD		VM
	sens.	spec.	sens.	spec.	sens.	spec.	sens.	spec.
occurrence of vertigo
in attacks	0.32	0.28	0.74	0.47	0.91	0.48	0.79	0.47
as persistent v~	0.38	0.91	0.00	0.76	0.00	0.78	0.00	0.77
kind of vertigo
rotatory vertigo	0.21	0.25	0.79	0.62	0.64	0.57	0.79	0.60
unsteadiness	0.64	0.68	0.16	0.43	0.46	0.51	0.43	0.50
lift feeling	0.15	1.00	0.00	0.89	0.00	0.91	0.00	0.90
lightheadedness	0.40	0.79	0.11	0.64	0.09	0.66	0.43	0.71
perception of environment
like on a roundabout	0.26	0.26	0.79	0.58	0.64	0.51	0.77	0.54
like on a boat	0.64	0.65	0.32	0.46	0.46	0.50	0.31	0.47
very blurred	0.21	0.98	0.00	0.85	0.00	0.87	0.08	0.88
ear noises
never - occasionally	0.70	0.33	0.88	0.35	0.10	0.23	0.86	0.34
frequently - always	0.30	0.68	0.12	0.66	0.90	0.75	0.14	0.62
defective hearing
never - occasionally	0.89	0.30	0.94	0.23	0.10	0.11	0.86	0.21
frequently - always	0.11	0.68	0.06	0.77	0.90	0.89	0.14	0.65
nausea/vomiting/sweating
never - occasionally	0.65	0.59	0.78	0.52	0.20	0.41	0.07	0.38
frequent - always	0.35	0.40	0.22	0.48	0.80	0.58	0.93	0.62
drop seizure
never - occasionally	0.80	0.24	1.00	0.27	0.50	0.23	0.64	0.19
frequently - always	0.20	0.76	0.00	0.73	0.50	0.82	0.36	0.81

Note that the cut-off points for the ordinal variables ear noises, defective hearing, nausea/vomiting/sweating, and drop seizures were chosen arbitrarily and do not necessarily match those of the diagnostic indices.

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