Development and external validation of a new PTA assessment scale

BMC Neurology

Table 7 Sensitivity, specificity and AUC’s (ROC analysis) of our proposed PTA scale and existing PTA scales

PTA Scale	1^stAdministration				one hour after 1^stadministration				24 hours after 1^stadministration
	Sens.	Spec.	AUC	95% C.I.	Sens.	Spec.	AUC	95% C.I.	Sens.	Spec.	AUC	95% C.I.
New PTA scale	68	77	0.77	0.69 - 0.85	76	91	0.85	0.73 - 0.97	80	95	0.89	0.81 - 0.97
GOAT	22	100	0.71	0.63 - 0.80	10	100	0.76	0.61 - 0.91	11	100	0.75	0.63 - 0.86
MOPTAS	92	43	0.84	0.77 - 0.90	67	91	0.78	0.64 - 0.93	85	100	0.92	0.86 - 0.99
WPTAS	89	43	0.80	0.73 - 0.87	57	91	0.75	0.60 - 0.90	83	100	0.91	0.84 - 0.98
R-WPTAS	46	97	0.72	0.64 - 0.80	38	96	0.66	0.50 - 0.83	50	100	0.74	0.63 - 0.86

AUC, area under the curve; ROC, receiver operating characteristic; PTA, post-traumatic amnesia; Sens., Sensitivity,%; Spec., Specificity,%. Based on optimal scores. C.I., confidence interval. GOAT, Galveston orientation and amnesia test; MOPTAS, modified Oxford PTA scale; (R-)WPTAS, Revised-Westmead PTA scale.

ISSN: 1471-2377