title: Toward the identification of neurocognitive subtypes in euthymic patients with bipolar disorder.
abstract: BACKGROUND
  Cross-sectional and meta-analytic studies showed that patients with bipolar disorder (BD) had neurocognitive impairments even during periods of euthymia. The aim of this study was to estimate the prevalence of BD patients with and without clinically significant cognitive impairments, as well as to analyze clinical and functional variables in these subgroups.
  
  
  METHODS
  Hundred patients with BD and 40 healthy controls were assessed with an extensive neurocognitive assessment. Soft (some cognitive domain with a performance below 1.5 SD of the mean) and hard (at least two domains with values below 2 SD of the mean) criteria were utilized to define clinically significant cognitive impairments.
  
  
  RESULTS
  Using both soft and hard criteria, the prevalence of clinically significant cognitive impairments was higher in people with BD than in healthy controls. 70% of patients only showed failures of small effect (d=0.21-0.35) in 2 measures of executive functions. Moreover, 30% of patients were indistinguishable from healthy subjects in terms of both neurocognitive and psychosocial functioning. On the contrary, 30% of the sample showed more severe cognitive deficits than those usually reported in literature and had the worst psychosocial functioning.
  
  
  CONCLUSIONS
  The fact that cognitive impairments are very heterogeneous among euthymic patients with BD could contribute to understanding differences in functional outcome. Theoretical and practical implications of these findings are discussed.
authors: Bipolar Disorder Program, Institute of Neurosciences, Favaloro University, Gurruchaga 2463, 1°"C", 1425 Ciudad Autónoma de Buenos Aires, Argentina; National Council of Scientific and Technical Research (CONICET), Argentina. Electronic address: diejmartino@gmail.com.
authors: Diego J
authors: DJ
authors: Martino
authors: Bipolar Disorder Program, Institute of Neurosciences, Favaloro University, Gurruchaga 2463, 1°"C", 1425 Ciudad Autónoma de Buenos Aires, Argentina; Institute of Cognitive Neurology (INECO), Buenos Aires, Argentina.
authors: Sergio A
authors: SA
authors: Strejilevich
authors: Bipolar Disorder Program, Institute of Neurosciences, Favaloro University, Gurruchaga 2463, 1°"C", 1425 Ciudad Autónoma de Buenos Aires, Argentina; National Council of Scientific and Technical Research (CONICET), Argentina.
authors: Eliana
authors: E
authors: Marengo
authors: Bipolar Disorder Program, Institute of Neurosciences, Favaloro University, Gurruchaga 2463, 1°"C", 1425 Ciudad Autónoma de Buenos Aires, Argentina; National Council of Scientific and Technical Research (CONICET), Argentina; Institute of Cognitive Neurology (INECO), Buenos Aires, Argentina; UDP-INECO Foundation Core on Neuroscience (UIFCoN), Diego Portales University, Santiago, Chile; Centre of Excellence in Cognition and its Disorders, Australian Research Council (ACR), New South Wales, Australia.
authors: Agustín
authors: A
authors: Ibañez
authors: Bipolar Disorder Program, Institute of Neurosciences, Favaloro University, Gurruchaga 2463, 1°"C", 1425 Ciudad Autónoma de Buenos Aires, Argentina.
authors: María
authors: M
authors: Scápola
authors: Bipolar Disorder Program, Institute of Neurosciences, Favaloro University, Gurruchaga 2463, 1°"C", 1425 Ciudad Autónoma de Buenos Aires, Argentina.
authors: Ana
authors: A
authors: Igoa
mesh_terms: D000328:Adult; D001714:Bipolar Disorder / Q000523:psychology*; D060825:Cognitive Dysfunction / Q000523:psychology*; D003527:Cyclothymic Disorder / Q000523:psychology*; D056344:Executive Function; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D009483:Neuropsychological Tests; D015995:Prevalence
keywords: Bipolar disorder; Executive function; Neuropsychology; Verbal memory