Vol. 13 nº 2 - Apr/May/Jun de 2019
Original Article Páginas: 203 a 209

Discriminative validity of an abbreviated semantic verbal fluency test

Authors José David Herrera-García1; Iago Rego-García1; Virginia Guillén-Martínez1; María Carrasco-García2; Carmen Valderrama-Martín1; Rosa Vílchez-Carrillo1; Samuel López-Alcalde1; Cristóbal Carnero-Pardo1,3


keywords: semantic verval fluency; diagnostic utility; Alzheimer's disease; brief cognitive test.

Semantic verbal fluency (SVF) is one of the most widely used tests for cognitive assessment due to its
diagnostic utility (DU).
OBJECTIVE: our objective is to evaluate the DU to detect cognitive impairment (CI) of a short version of the SVF applied in 30 seconds (SVF1-30).
METHODS: a prospective sample of consecutive patients evaluated in a Neurology Unit between December 2016 and December 2017 were assessed with the Global Deterioration Scale (GDS), 30-second and 60-second SVF tests (animals), and the Fototest, which includes a fluency task of people's names. The DU for CI was evaluated by the area under the ROC curve and effect size ("d" Cohen).
RESULTS: the study included 1012 patients (256 with CI, 395 with dementia). SVF1-30 shows a good correlation with GDS stage. The DU of SVF1-30 is identical to that of the classical version, applied in 60 seconds, (SVFtotal) for CI (0.89 ± 0.01; p > 0.50), and shows no significant difference for dementia (0.85 ± 0.01 vs. 0.86 ± 0.01, p > 0.15).
DISCUSSION: the DU of SVF1-30 is similar to that of the SVFtotal, allowing a reduction in examination time with no loss of discriminative capacity.


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