title: Occupational categories at risk for Parkinson's disease.
abstract: BACKGROUND
  The etiology of Parkinson's disease (PD) is considered to have a strong environmental component, but relatively few studies have investigated the potential association between occupation and the disease.
  
  
  METHODS
  In a population-based case-control study, we collected comprehensive occupational histories from all study participants, 144 case and 464 control subjects.
  
  
  RESULTS
  Chi-square analysis revealed that working in an agricultural occupation increased estimated PD risk (OR = 1.74; 95% CI = 0.85, 3.60). In contrast, a history of ever working in a service occupation was negatively associated with PD risk (OR = 0.69; 95% CI = 0.47, 1.00). Risk estimates were close to one for specific service occupations. Adjusted odds ratios for all non-service occupational and industrial categories were similar, and working in a service occupation was the only significant inverse predictor of PD risk.
  
  
  CONCLUSIONS
  Future investigations focusing on lifestyle factors and environmental exposures within the agricultural and service occupational categories are warranted.
authors.affiliation: Departments of Biostatistics and Research Epidemiology, Henry Ford Health System, Detroit, Michigan, USA. kkirkey1@hfhs.org
authors.forename: K L
authors.initials: KL
authors.lastname: Kirkey
authors.forename: C C
authors.initials: CC
authors.lastname: Johnson
authors.forename: B A
authors.initials: BA
authors.lastname: Rybicki
authors.forename: E L
authors.initials: EL
authors.lastname: Peterson
authors.forename: G X
authors.initials: GX
authors.lastname: Kortsha
authors.forename: J M
authors.initials: JM
authors.lastname: Gorell
mesh_terms: D000368:Aged; D000383:Agriculture; D016022:Case-Control Studies; D016009:Chi-Square Distribution; D005260:Female; D006306:Health Surveys; D006801:Humans; D016015:Logistic Models; D008297:Male; D008875:Middle Aged; D009784:Occupational Diseases / Q000209:etiology* / Q000517:prevention & control; D016273:Occupational Exposure / Q000009:adverse effects* / Q000706:statistics & numerical data; D009790:Occupations; D016017:Odds Ratio; D010300:Parkinson Disease / Q000209:etiology* / Q000517:prevention & control; D012189:Retrospective Studies; D018570:Risk Assessment; D012307:Risk Factors; D018709:Statistics, Nonparametric; D011795:Surveys and Questionnaires