title: Occupational factors associated with the potential years of working life lost due to a non-work related permanent disability.
abstract: OBJECTIVE
  To analyze the association between occupational factors (number of contracts and occupational category) and potential years of working life lost (PYWLL) due to non-work related permanent disability (PD).
  
  
  METHODS
  The study design was a retrospective cohort of 11,812 workers affiliated with the Social Security System in Spain that began a non-work related PD between 2004 and 2009.
  
  
  METHODS
  The PYWLL was defined as the time in years between the age at which a worker initiates a PD and age 65 or the age of reinstatement to a job. The PYWLL was analyzed by calculating the quartiles and using an approach based on a median regression.
  
  
  RESULTS
  The difference in medians of PYWLL between men and women was 2.49 years (95% CI: 2.01-2.97); between skilled non-manual and unskilled manual workers was 1.88 years (95% CI: 1.08-2.69); between workers with three or more contracts and workers with a single contract in the period was 3.78 years (95% CI: 3.28-4.29).
  
  
  CONCLUSIONS
  Women, non-skilled workers and employees that have had more contracts within the period of study are those with greatest loss of PYWLL. This suggests that individuals with poorer working and employment conditions could have more PYWLL.
authors.affiliation: Center for Research in Occupational Health, Pompeu Fabra University, Barcelona, Spain.
authors.forename: Xavier
authors.initials: X
authors.lastname: Duran
authors.forename: José Miguel
authors.initials: JM
authors.lastname: Martínez
authors.forename: Fernando G
authors.initials: FG
authors.lastname: Benavides
mesh_terms: D006233:Persons with Disabilities / Q000706:statistics & numerical data*; D004651:Employment / Q000706:statistics & numerical data*; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D009790:Occupations / Q000706:statistics & numerical data*; D012189:Retrospective Studies; D012737:Sex Factors; D012943:Social Security / Q000706:statistics & numerical data; D013030:Spain; D017132:Workplace