title: Perceptual/attentional anomalies in schizophrenia: a family study.
abstract: Endophenotypes have emerged as an important concept in the study of schizophrenia. Perceptual/attentional anomalies were examined as potential endophenotypes in a family study using a strategy for "multiplex/simplex schizophrenia". The sample was comprised of 797 subjects: 206 schizophrenia patients, 302 first-degree relatives and 289 controls. The Spanish versions of the Structured Interview for Assessing Perceptual/attentional Anomalies (SIAPA) and Positive and Negative Symptoms Scale (PANSS) were applied to measure the presence of perceptual/attentional anomalies, and positive and negative subscale respectively. An ANCOVA was carried out for global comparisons between groups. The multiplex schizophrenic group had significantly more frequent auditory and visual perceptual/attentional anomalies than Simplex schizophrenic and control groups. The most interesting finding was that the severity of auditory and visual perceptual/attentional anomalies and negative symptoms was significantly higher in the relatives of the multiplex schizophrenia group than in those relatives from the simplex schizophrenia and control groups. The existence of perceptual/attentional anomalies in nonaffected relatives suggests the presence of familial association for these symptoms which may therefore be a potential endophenotype suitable for genetic studies.
authors.affiliation: Department of Biological Psychiatry, Cuban Neuroscience Center, Cubanacán, P.O. Box 11600, Havana City, Cuba. migdyrai@yahoo.com
authors.forename: Migdyrai
authors.initials: M
authors.lastname: Martín-Reyes
authors.forename: Raúl
authors.initials: R
authors.lastname: Mendoza Quiñones
authors.forename: Thais
authors.initials: T
authors.lastname: Díaz de Villalvilla
authors.forename: Mitchell
authors.initials: M
authors.lastname: Valdés Sosa
mesh_terms: D000328:Adult; D000368:Aged; D000704:Analysis of Variance; D001289:Attention Deficit Disorder with Hyperactivity / Q000209:etiology*; D001307:Auditory Perception / Q000502:physiology; D005190:Family / Q000523:psychology; D005192:Family Health; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D009483:Neuropsychological Tests; D010468:Perceptual Disorders / Q000209:etiology*; D011569:Psychiatric Status Rating Scales; D012559:Schizophrenia / Q000150:complications*; D014796:Visual Perception / Q000502:physiology