title: [Knee dysfunction in the general population and associated factors].
abstract: BACKGROUND
  Knee joint dysfunction is present in 80% of people over 50 years of age, and in women there is a 1.5 times higher risk compared to men. Another important risk factor is obesity, which leads to a 3 times increase in the risk of suffering functional limitations in the joint. The aim of this study was to determine knee joint dysfunction and the associated factors.
  
  
  METHODS
  An analytical and descriptive study was conducted on 218 individuals older than 50 years of age in a primary care centre. A physical examination was performed on each patient, and the Western Ontario and McMaster Universities Osteoarthritis Index questionnaire was applied to them all. Logistic regression analysis was used to determine the association between age, gender, body mass index, and knee function. ANOVA was used to compare the means of the Western Ontario and McMaster Universities Osteoarthritis Index scores and body mass index measurements. A p<0.05 was considered statistically significant.
  
  
  RESULTS
  The mean age was 64.27 years (SD 10.43). An OR of 4.50 was obtained for having a disability in people over 65 years of age, 2.90 in obese people, and 2.02 in women. The mean scores in the 3 domains of Western Ontario and McMaster Universities Osteoarthritis Index were higher as the body mass index increased.
  
  
  CONCLUSIONS
  Women have greater disability than men, becoming more evident in older ages, and other risk of joint dysfunction increases up 3 times in obese patients.
authors.affiliation: Servicio de Laboratorio de Análisis Clínicos, Unidad de Medicina Familiar N.(o) 20, Instituto Mexicano del Seguro Social, México, D.F., México.
authors.forename: José Luis
authors.initials: JL
authors.lastname: Solis-Hernández
authors.affiliation: Coordinación Clínica de Educación e Investigación en Salud, Unidad de Medicina Física y Rehabilitación Centro, Unidad Médica de Alta Especialidad, Hospital de Traumatología y Ortopedia Lomas Verdes, Instituto Mexicano del Seguro Social, México, D.F., México. Electronic address: rojanodavid@gmail.com.
authors.forename: David
authors.initials: D
authors.lastname: Rojano-Mejía
authors.affiliation: Coordinación Clínica de Educación e Investigación en Salud, Unidad de Medicina Familiar N.(o) 2, Instituto Mexicano del Seguro Social, México, D.F., México.
authors.forename: Marlene
authors.initials: M
authors.lastname: Marmolejo-Mendoza
mesh_terms: D000367:Age Factors; D000368:Aged; D015897:Comorbidity; D005260:Female; D006801:Humans; D007719:Knee Joint / Q000503:physiopathology*; D008297:Male; D008800:Mexico / Q000453:epidemiology; D008875:Middle Aged; D020370:Osteoarthritis, Knee / Q000453:epidemiology*; D050177:Overweight / Q000453:epidemiology; D010808:Physical Examination; D015995:Prevalence; D012720:Severity of Illness Index; D012737:Sex Factors; D011795:Surveys and Questionnaires
keywords: Aged; Articulación de la rodilla; Body mass index; Gender; Género; Knee joint; Western Ontario and McMaster Universities Osteoarthritis Index; Índice de masa corporal