title: The Work Ability Index as a screening tool to identify the need for rehabilitation: longitudinal findings from the Second German Sociomedical Panel of Employees.
abstract: OBJECTIVE
  To evaluate the predictive value of the Work Ability Index (WAI) for different indicators of the need for rehabilitation at 1-year follow-up.
  
  
  METHODS
  Cohort study.
  
  
  METHODS
  Data were obtained from the Second German Sociomedical Panel of Employees, a large-scale cohort study with postal surveys in 2009 and 2010.
  
  
  RESULTS
  A total of 457 women and 579 men were included. Confirmatory factor analysis confirmed the one-dimensionality of the WAI. Regression analyses showed that poor and moderate baseline WAI scores were associated with lower health-related quality of life and more frequent use of primary healthcare 1 year later. Subjects with poor baseline work ability had 4.6 times higher odds of unemployment and 12.2 times higher odds of prolonged sick leave than the reference group with good or excellent baseline work ability. Moreover, the odds of subjectively perceived need for rehabilitation, intention to request rehabilitation and actual use of rehabilitation services were 9.7, 5.7 and 3 times higher in the poor baseline WAI group and 5.5, 4 and 1.8 times higher in the moderate baseline WAI group, respectively. A WAI score ≤ 37 was identified as the optimal cut-off to predict the need for rehabilitation.
  
  
  CONCLUSIONS
  The WAI is a valid screening tool for identifying the need for rehabilitation.
authors.affiliation: Department for Rehabilitation Medicine, Coordination Centre for Applied Rehabilitation Research, Hannover Medical School, Hannover, Germany. bethge.matthias@mh-hannover.de
authors.forename: Matthias
authors.initials: M
authors.lastname: Bethge
authors.forename: Friedrich Michael
authors.initials: FM
authors.lastname: Radoschewski
authors.forename: Christoph
authors.initials: C
authors.lastname: Gutenbrunner
mesh_terms: D000203:Activities of Daily Living; D002908:Chronic Disease / Q000534:rehabilitation*; D003695:Delivery of Health Care; D006233:Persons with Disabilities / Q000534:rehabilitation*; D004651:Employment; D005260:Female; D005500:Follow-Up Studies; D005858:Germany; D006296:Health Services / Q000706:statistics & numerical data; D006301:Health Services Needs and Demand; D006801:Humans; D033182:Intention; D008137:Longitudinal Studies; D008297:Male; D008875:Middle Aged; D016272:Occupational Health; D010465:Perception; D011788:Quality of Life; D012016:Reference Values; D012044:Regression Analysis; D012720:Severity of Illness Index; D018582:Sick Leave; D014478:Unemployment; D014937:Work; D014938:Work Capacity Evaluation