title: Factors associated with variability in length of sick leave because of acute low back pain in Chile.
abstract: BACKGROUND
  Acute low back pain (LBP) is a frequent cause of physician visits and sick leave. Patients with longer sick leave account for most costs associated with LBP. Most research on risk factors for prolonged sick leave because of LBP has been done in Anglo-Saxon or Northern European populations with occupational LBP. Few studies have been conducted in less affluent Latin countries.
  
  
  OBJECTIVE
  To investigate the prevalence of acute LBP as a cause of sick leave and the variables associated with longer work absence (WA) because of acute LBP in Chile.
  
  
  METHODS
  A retrospective study of nonoccupational sick leave certificates issued in a 1-year period by the Chilean Public Health System.
  
  
  METHODS
  Ten thousand cases with nonoccupational sick leave certificates issued with the diagnosis of acute LBP.
  
  
  METHODS
  Prevalence of acute LBP as a cause of sick leave, days of WA, and subsidy payment.
  
  
  METHODS
  A review of sick leave certificates from patients with different diagnoses was done to determine the prevalence of acute LBP as a cause of sick leave. We investigated whether age, gender, history of at least one episode of sick leave in the previous year because of acute LBP or because of other diagnoses, stipendiary subsidy paid (converted to US $), work activity, occupation, and the specialty of the attending physician influenced the length of sick leave.
  
  
  RESULTS
  Acute LBP represented 5.4% of cases causing sick leave. Patients with acute LBP who had significantly longer sick leave than the rest of the population were patients with an episode of WA because of LBP in the previous year (14% longer sick leave than patients without that history), manual workers (35% longer than nonmanual workers), and patients seen by orthopedic surgeons (43% longer than patients seen by other medical specialists). Nonpregnant women and men had similar durations of sick leave because of acute LBP.
  
  
  CONCLUSIONS
  Physicians who treat patients with LBP should be aware of these variables associated with longer sick leave because of acute LBP, which represents a significant burden to any society and is an important epidemiologic problem.
authors.affiliation: Department of Orthopaedic Surgery, Mutual de Seguridad CChC, Clinica Alemana, Universidad del Desarrollo, Santiago, Chile.
authors.forename: Claudio
authors.initials: C
authors.lastname: Diaz-Ledezma
authors.forename: Julio
authors.initials: J
authors.lastname: Urrutia
authors.forename: Jose
authors.initials: J
authors.lastname: Romeo
authors.forename: Alfonso
authors.initials: A
authors.lastname: Chelen
authors.forename: Leonardo
authors.initials: L
authors.lastname: González-Wilhelm
authors.forename: Cristian
authors.initials: C
authors.lastname: Lavarello
mesh_terms: D000041:Absenteeism; D000208:Acute Disease; D000293:Adolescent; D000328:Adult; D000368:Aged; D002677:Chile / Q000453:epidemiology; D017281:Cost of Illness; D004185:Disability Evaluation; D004651:Employment; D005260:Female; D006801:Humans; D017116:Low Back Pain / Q000175:diagnosis / Q000453:epidemiology / Q000503:physiopathology*; D008297:Male; D008875:Middle Aged; D015995:Prevalence; D012044:Regression Analysis; D012189:Retrospective Studies; D018582:Sick Leave / Q000706:statistics & numerical data*; D013997:Time Factors; D017132:Workplace; D055815:Young Adult