Fluencia verbal: un test neuropsicológico breve para la detección de trastornos cognitivos en pediatría / Verbal fluency: A rapid neuropsychological test for the detection of cognitive disorders in pediatrics

RESUMEN INTRODUCCIÓN: La fluencia verbal es un test psicométrico breve utilizado en evaluaciones neuropsicológicas para estudiar funciones ejecutivas y verbales. El desempeño en la población pediátrica en esta prueba no ha sido profundamente estudiado. Tampoco encontramos estudios en pediatría que analicen la fluidez verbal fonológica (FF) en relación al nivel intelectual utilizando la versión española con letras iniciales "P" y "M". OBJETIVO: Analizar el rendimiento en FF en función del nivel intelectual y del diagnóstico. MÉTODO: Corte transversal. Se incluyeron pacientes entre 6 y 16 años con evaluación neuropsicológica con nivel intelectual (WISCIV) y FF (NEPSYII) entre enero y junio del 2016. Se realizó una regresión lineal simple para analizar la relación entre FF y el resto de las variables de estudio. RESULTADOS: Se incluyeron 95 pacientes, edad media de 10 años. La FF mostró correlación positiva con el nivel intelectual total (CIT) (r=3,71; p<0,001; IC95 % 2,77- 4,65). El 73 % de pacientes con FF normal tuvieron un CIT normal. La probabilidad de presentar un CIT descendido presentado una FF menor de 7 fue 5,5 veces mayor (OR=5,5 p<0,003; IC95 %=2,23-13,76). Quienes presentaron una FF descendida con CIT normal (n=19), El 80 % tenía diagnóstico de trastorno por déficit de atención (15/19) y 21 % dislexia (4/19). CONCLUSIONES: Nuestros resultados tienen una importante implicancia clínica, pues no siempre se dispone del acceso y tiempo necesario para realizar una evaluación neuropsicológica extensa. El presente trabajo demuestra que la prueba FF de rápida administración con letras "P" y "M" resulta una herramienta de screening neuropsicológica efectiva en revelar déficit no sólo en funciones ejecutivas y habilidades verbales, sino también en detectar el rendimiento intelectual descendido.

SUMMARY INTRODUCTION: Verbal fluency is a brief psychometric test used in neuropsychological assessments to study executive and verbal functions. Pediatric population performance in this trial has not been thoroughly studied. We also did not find studies in pediatrics that analyze the phonological verbal fluency (FF) in relation to the intellectual level using the Spanish version with initial letters "P" and "M". OBJECTIVE: Analyze FF performance based on intellectual level and diagnosis. METHODS: It's a cross-section research. We included patients between 6 and 16 years old with neuropsychological assessment with intellectual level (WISCIV) and FF (NEPSYII) between January and June of 2016. A simple linear regression was performed to analyze the relationship between FF and the rest of the variables. RESULTS: We included 95 patients, mean age of 10 years. The FF showed a positive correlation with the total intellectual level (ITC) (r = 3.71, p <0.001, 95% CI 2.77-4.65). The 73% of patients with normal FF had a normal ITC. The probability of showing a lower ITC when the FF was lower than 7 was 5.5 times greater (OR = 5.5, p <0.003, 95% CI = 2.23-13.76). Those who presented a lower FF with normal ITC (n = 19) 80% had diagnosis of Attention Deficit Disorder (15/19) and 21% dyslexia (4/19). CONCLUSIONS: Our results have important clinical implications because the access and time necessary for an extensive neuropsychological evaluation is not always available. The present research shows that FF of 2 minutes long with letters "P" and "M" is an effective neuropsychological screening tool in revealing deficit not only in executive functions and verbal abilities, but also in detecting decreased intellectual performance. Those patients with poor performance in this test should perform a complete neuropsychological assesment in order to clarify the diagnosis.

Tratamiento con vitamina D y enlentecimiento de la progresión a estadio severo en enfermedad de Alzheimer / [Treatment with vitamin D and slowing of progression to severe stage of Alzheimer’s disease].

The aim of the study was to analyze the impact of treatment with vitamin D in the progression of Alzheimer’s disease. We performed a retrospective study including patients with mild stage of Alzheimer’s disease with more than four years of follow-up. The presence of cardiovascular risk factors, osteoporosis, treatment with memantine, acetylcholinesterase inhibitors drugs and vitamin D were analyzed as independent variables. Time of progression to moderate and severe Alzheimer’s disease was analyzed as dependent variable. The analysis was done using multivariate linear regression model, Kaplan Meier analysis, Chi-square and T test. Two hundred and two patients met the inclusion criteria. 11

of the patients (n = 23) remained in the mild stage of the disease, 54

(n = 110) developed the moderate form in a mean time of 3 ± 1.4 years while 35

(n = 69) developed the severe form in a mean time of 4.6 ± 1.4 years. Time of progression to severe stage of Alzheimer’s disease was slower in patients under treatment with vitamin D compared with those without treatment (5.4 ± 0.4 years vs. 4.4 ± 0.16 years respectively, p=0.003). Treatment with vitamin D may be an independent protecting factor in the progression of Alzheimer’s disease.