title: Disabling spondyloarthrosis risk factors in valley of Mexico workers.
abstract: BACKGROUND
  The objective of this study was to describe the most prevalent physically disabling conditions for insured workers belonging to the Mexican Social Security Institute (IMSS) in the Valley of Mexico and to identify risk factors for disabling spondyloarthrosis.
  
  
  METHODS
  Retrospective cases and prevalent controls from IMSS clinics in the Mexico City metropolitan area were studied. Eighty cases were IMSS workers reporting disability due to spondyloarthrosis; 80 controls were active workers at the same workplace and shared the economic activity of the cases. The 1995 IMSS Disability Report was reviewed. From this report congenital conditions of the musculoskeletal system, obesity, history of trauma, and sociodemographic patient characteristics were assessed.
  
  
  RESULTS
  The most important risk factors were a history of spina bifida (odds ratio [OR] = 29.3, 95% confidence interval [95% CI] = 5.3-161; p = 0.0009), supernumerary vertebrae (OR = 21.3, 95% CI = 5.3-95; p = 0.0001), history of low back (lumbar) trauma (OR = 3.9, 95% CI = 1.9-8.3; p = 0.0004), flatfoot (OR = 11.7, 95% CI = 1.9-69, p = 0.02), and obesity (OR = 2.0, 95% CI = 1.06-4.03; p = 0.04).
  
  
  CONCLUSIONS
  A history of congenital deformity of the musculoskeletal system, spinal column trauma, and obesity were risk factors most associated with work disability due to spondyloarthrosis.
authors.affiliation: Coordinacíon de Salud Ocupacional, Centro Médico Nacional Siglo XXI, Instituto Mexicano del Seguro Social (IMSS), Mexico City, Mexico. lrp55@hotmail.com
authors.forename: Pablo
authors.initials: P
authors.lastname: López-Rojas
authors.forename: Alberto
authors.initials: A
authors.lastname: Aguilar-Salinas
authors.forename: Santiago
authors.initials: S
authors.lastname: Salinas-Tovar
authors.forename: Irma A
authors.initials: IA
authors.lastname: Marín-Cotoñieto
authors.forename: Ma
authors.initials: M
authors.lastname: del Carmen Martínez-García
authors.forename: Juan
authors.initials: J
authors.lastname: Garduño-Espinosa
mesh_terms: D000328:Adult; D000368:Aged; D019567:Back Injuries / Q000150:complications / Q000175:diagnosis* / Q000453:epidemiology; D001416:Back Pain / Q000175:diagnosis* / Q000453:epidemiology; D016022:Case-Control Studies; D005413:Flatfoot / Q000150:complications; D006801:Humans; D008297:Male; D008800:Mexico; D008875:Middle Aged; D009765:Obesity / Q000150:complications; D012189:Retrospective Studies; D012307:Risk Factors; D016135:Spinal Dysraphism / Q000150:complications; D013131:Spine / Q000002:abnormalities