title: [Metric properties of clinimetric indexes for non-motor dysfunction of Parkinson's disease in Mexican population].
abstract: OBJECTIVE
  To determine the metric properties of the non-motor symptoms questionnaire (NMSQuest), non-motor symptoms scale (NMSSS) and SCOPA-AUT clinimetric instruments to assess non motor dysfunction in Mexican population.
  
  
  METHODS
  After linguistic validation, the instruments were applied to 100 consecutive Parkinson's disease patients to analyze its metric properties in Mexican out-patients from the National Institute of Neurology and Neurosurgery.
  
  
  RESULTS
  Internal consistency by Cronbach's alpha was above 0.80 for all instruments. Inter-item and item-total correlations were above 0.30 in the majority of the domains and inter-observer variability was acceptable. Total score did not correlate with any of the registered clinical variables.
  
  
  CONCLUSIONS
  The metric properties of the three instruments were acceptable and similar to published data from other countries.
authors.affiliation: Laboratorio Clínico de Enfermedades Neurodegenerativas, Instituto Nacional de Neurología y Neurocirugía, DF Mexico. acervantes@innn.edu.mx
authors.forename: Amin
authors.initials: A
authors.lastname: Cervantes-Arriaga
authors.forename: Mayela
authors.initials: M
authors.lastname: Rodríguez-Violante
authors.forename: Alejandra
authors.initials: A
authors.lastname: Villar-Velarde
authors.forename: Mario
authors.initials: M
authors.lastname: López-Gómez
authors.forename: Teresa
authors.initials: T
authors.lastname: Corona
mesh_terms: D000368:Aged; D005260:Female; D006801:Humans; D007802:Language; D008297:Male; D008800:Mexico; D008875:Middle Aged; D010045:Outpatients; D010300:Parkinson Disease / Q000503:physiopathology*; D015203:Reproducibility of Results; D012720:Severity of Illness Index; D011795:Surveys and Questionnaires