title: [Pneumoconiosis in affiliated workers have irreversible sequelae].
abstract: OBJECTIVE
  to analyze the frequency and importance of pneumoconiosis in affiliated workers to Instituto Mexicano del Seguro Social.
  
  
  METHODS
  it was carried out a transverse, observational and comparative study; the behavior of the qualified pneumoconiosis was revised 1994-2004. The analyzed variables were sex, age, occupation, permanent disability and economic activity. It was carried out the analysis of absolute frequencies and rates.
  
  
  RESULTS
  it was registered 14,827 cases; the rate for 10,000 workers oscillated from 0.48 to 2.39. The 99 % were presented in males, with 14,262 cases with permanent disability (rate: 96.89 per 100 cases of pneumoconiosis); employments with more frequency were miners, quarry workers and bricklayers. The average of permanent disability for pneumoconiosis in the period was of 11.09 to 15 %. States with a higher number of cases were Coahuila, Zacatecas and Hidalgo. Economic activities with a greater incidence were the extraction and benefit of mineral coal, graphite and metallic and non-metallic minerals.
  
  
  CONCLUSIONS
  cases of pneumoconiosis have been decreasing, but even the determination of diagnosis is delayed, and due to this most workers have irreversible sequelae.
authors.affiliation: Coordinación de Salud en el Trabajo, Centro Médico Nacional Siglo XXI, Instituto Mexicano del Seguro Social, Mexico. pablo.lopez@imss.gob.mx
authors.forename: Pablo
authors.initials: P
authors.lastname: López-Rojas
authors.forename: Ricardo
authors.initials: R
authors.lastname: Nava-Larraguivel
authors.forename: Santiago
authors.initials: S
authors.lastname: Salinas-Tovar
authors.forename: Rafael
authors.initials: R
authors.lastname: Santos-Celis
authors.forename: Irma Araceli
authors.initials: IA
authors.lastname: Marín-Cotoñieto
authors.forename: María Martha
authors.initials: MM
authors.lastname: Méndez-Vargas
mesh_terms: D000328:Adult; D000368:Aged; D018450:Disease Progression; D005260:Female; D006801:Humans; D008297:Male; D008800:Mexico / Q000453:epidemiology; D008875:Middle Aged; D009784:Occupational Diseases / Q000175:diagnosis / Q000453:epidemiology*; D011009:Pneumoconiosis / Q000175:diagnosis / Q000453:epidemiology*; D012042:Registries; D017211:Treatment Failure; D055815:Young Adult