Disabling spondyloarthrosis risk factors in valley of Mexico workers.
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.
López-Rojas
Pablo
P
Coordinacíon de Salud Ocupacional, Centro Médico Nacional Siglo XXI, Instituto Mexicano del Seguro Social (IMSS), Mexico City, Mexico. lrp55@hotmail.com
Aguilar-Salinas
Alberto
A
Salinas-Tovar
Santiago
S
Marín-Cotoñieto
Irma A
IA
del Carmen Martínez-García
Ma
M
Garduño-Espinosa
Juan
J
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