The Journal of clinical psychiatry · 2017
The Diagnostic Challenge of the Late-Onset Frontal Lobe Syndrome: Clinical Predictors for Primary Psychiatric Disorders Versus Behavioral Variant Frontotemporal Dementia.
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Vijverberg Everard G B, Gossink Flora, Krudop Welmoed, Sikkes Sietske, Kerssens Cora, Prins Niels, Stek Max, Scheltens Philip, Pijnenburg Yolande, Dols Annemiek
Аннотация
OBJECTIVE: Primary psychiatric disorders (PsD) can present with symptomatology identical to that of behavioral variant frontotemporal dementia (bvFTD). To date, clinical guidelines do not provide a solution for this diagnostic challenge. The aim of our study was to prospectively determine which demographic, clinical, neuropsychological, neuroimaging, and cerebrospinal fluid biomarkers are important in distinguishing PsD from bvFTD.
METHODS: Patients with late-onset behavioral disturbances (aged 45-75 years, 73% male) were included based on their scores on the Frontal Behavioral Inventory and the Stereotypy Rating Inventory and followed for 2 years from April 2011 to June 2015. Odds ratios (ORs) were calculated with backward stepwise logistic regression analyses to investigate the association between baseline clinical and demographic variables and the 2-year follow-up diagnosis of PsD (n = 46) (DSM-IV) versus probable/definite bvFTD (n = 27) (International Behavioral Variant FTD Criteria Consortium criteria). We separately measured the association between additional investigations and the 2-year follow-up diagnosis. Finally, we combined the selected variables to measure the predictive value of both clinical and additional investigations in a single model.
RESULTS: Male gender (OR = 5.9; 95% CI, 1.3-26.0), less stereotypy (OR = 0.08; 95% CI, 0.02-0.34), and more depressive symptoms (OR = 1.13; 95% CI, 1.04-1.24) explained 49% of the variance predicting PsD versus bvFTD (χ²₃ = 29.4, P < .001) and correctly classified 82.1% of the cases. Neuroimaging (OR = 0.02; 95% CI, 0.002-0.123) explained 55% of the variance (χ²₁ = 37.5, P < .001) and, in combination with clinical variables, 66.1% of the variance (χ²₃ = 44.06, P < .001).
CONCLUSIONS: The present study demonstrated that PsD can be distinguished from probable/definite bvFTD with a thorough clinical evaluation by a psychiatrist and neurologist along with use of validated questionnaires for depression and stereotypy; these measures are even more effective in combination with neuroimaging.
METHODS: Patients with late-onset behavioral disturbances (aged 45-75 years, 73% male) were included based on their scores on the Frontal Behavioral Inventory and the Stereotypy Rating Inventory and followed for 2 years from April 2011 to June 2015. Odds ratios (ORs) were calculated with backward stepwise logistic regression analyses to investigate the association between baseline clinical and demographic variables and the 2-year follow-up diagnosis of PsD (n = 46) (DSM-IV) versus probable/definite bvFTD (n = 27) (International Behavioral Variant FTD Criteria Consortium criteria). We separately measured the association between additional investigations and the 2-year follow-up diagnosis. Finally, we combined the selected variables to measure the predictive value of both clinical and additional investigations in a single model.
RESULTS: Male gender (OR = 5.9; 95% CI, 1.3-26.0), less stereotypy (OR = 0.08; 95% CI, 0.02-0.34), and more depressive symptoms (OR = 1.13; 95% CI, 1.04-1.24) explained 49% of the variance predicting PsD versus bvFTD (χ²₃ = 29.4, P < .001) and correctly classified 82.1% of the cases. Neuroimaging (OR = 0.02; 95% CI, 0.002-0.123) explained 55% of the variance (χ²₁ = 37.5, P < .001) and, in combination with clinical variables, 66.1% of the variance (χ²₃ = 44.06, P < .001).
CONCLUSIONS: The present study demonstrated that PsD can be distinguished from probable/definite bvFTD with a thorough clinical evaluation by a psychiatrist and neurologist along with use of validated questionnaires for depression and stereotypy; these measures are even more effective in combination with neuroimaging.