Table 2.

The sensitivity and specificity of MediPost according to the measuring parameters. For comparison purposes the results of specificity for length and surface were adjusted to the value obtained for sway velocity.

Condition	Measurement parameter	AUC	p	Sensitivity	Specificity	PPV	NPV	Difference between sensitivity
Head shaking posturography 0.3 Hz
1st	Velocity	0.64	0.01	92	43	48	90	0.0%
	Length	0.65	0.006	90	43	47	88	2.9%
	Surface	0.69	<.001	92	43	48	90	0.0%
2nd	Velocity	0.64	0.01	50	80	60	73	0.0%
	Length	0.65	0.01	47	80	58	73	5.3%
	Surface	0.62	0.009	34	80	52	68	31.6%
3rd	Velocity	0.82	<.001	74	82	70	84	3.4%
	Length	0.85	<.001	76	82	71	86	0.0%
	Surface	0.85	<.001	68	82	68	82	10.3%
4th	Velocity	0.95	<.001	87	96	92	93	0.0%
	Length	0.96	<.001	87	96	92	93	0.0%
	Surface	0.94	<.001	79	96	91	89	9.1%
Head shaking posturography 0.6 Hz
1st	Velocity	0.70	0.001	58	79	61	76	0.0%
	Length	0.69	<.001	50	79	58	73	9.5%
	Surface	0.69	0.001	45	79	55	71	19.0%
2nd	Velocity	0.68	0.001	66	74	60	79	0.0%
	Length	0.69	<.001	58	74	56	75	12.0%
	Surface	0.67	0.003	50	74	53	72	24.%
3rd	Velocity	0.87	<.001	74	92	85	86	0.0%
	Length	0.90	<.001	72	92	84	85	3.6%
	Surface	0.89	<.001	68	92	84	84	7.1%
4th	Velocity	0.92	<.001	82	88	80	89	6.1%
	Length	0.93	<.001	82	88	80	89	6.1%
	Surface	0.93	<.001	87	88	81	92	0.0%

Conditions: 1st (eyes open/stable surface), 2nd (eyes closed/stable surface), 3rd (eyes open/foam), 4th (eyes closed/foam).

The most significant results are in bold.

AUC area under curve, PPV positive predictive value, NPV negative predictive value.