Corrigendum to “Rapid cognitive assessment: Accuracy and discriminant validity of Mini-Cog and process-based Clock Drawing Test”

In Table 3, the Negative Likelihood Ratio (NLR) values were miscalculated due to an inversion in the formula application. The correct formula for NLR is: NLR = (1 − Sensitivity) / Specificity. The revised Table 3 with accurate NLR values is as follows. This correction improves statistical precision but does not alter the study’s primary conclusions regarding the diagnostic performance of Mini-Cog3 and the process-based CDT. The authors sincerely apologize for this oversight and any potential confusion it may have caused.

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Table 3.

ROC analyses for three Mini-Cog tests and CDT to differentiate MCI and AD from NC.

				MCI
Index	AUC	95%CI	Cutoff	Sensitivity	Specificity	PPV	NPV	PLR	NLR	Accuracy
Mini-Cog1(short version)	0.75	0.71-0.79	2	0.57	0.83	0.82	0.58	3.25	0.52	0.68
Mini-Cog2(medium version)	0.75	0.71-0.79	7	0.68	0.70	0.76	0.61	2.29	0.45	0.69
CDT	0.77	0.73-0.81	7	0.89	0.55	0.73	0.78	1.98	0.21	0.75
Mini-Cog3(long version)	0.82	0.78-0.85	12	0.85	0.65	0.77	0.75	2.43	0.24	0.76

				AD
Mini-Cog1(short version)	0.92	0.90-0.94	2	0.89	0.83	0.89	0.82	5.10	0.13	0.87
Mini-Cog2(medium version)	0.95	0.94-0.97	6	0.88	0.89	0.93	0.81	7.92	0.14	0.88
CDT	0.87	0.84-0.90	6	0.82	0.75	0.84	0.72	3.28	0.24	0.79
Mini-Cog3(long version)	0.95	0.94-0.97	10	0.85	0.91	0.94	0.79	9.09	0.16	0.87