title: Screening for the risk of job loss in multiple sclerosis (MS): development of an MS-specific Work Instability Scale (MS-WIS).
abstract: BACKGROUND
  Multiple sclerosis (MS) mainly presents amongst those of working age. Depending upon the type of MS, many people embark upon a long period of managing their day-to-day work-related needs in the face of intermittent and sometimes persistent disabling symptoms. The objective of this study was to explore the concept of work instability (WI) following the onset of MS and develop a Work Instability Scale (WIS) specific to this population.
  
  
  METHODS
  WI amongst those with MS in work was explored through qualitative interviews which were then used to generate items for a WIS. Rasch analysis was used to refine the scaling properties of the MS-WIS, which was then validated against expert vocational assessment by occupational health physiotherapists and ergonomists.
  
  
  RESULTS
  The resulting measure is a 22-item, self-administered scale which can be scored in three bands indicating low, medium and high risk of WI (job retention) problems. The scale meets modern psychometric requirements for measurement, indicated by adequate fit to the Rasch model with absence of local dependency and differential item functioning (DIF) by age, gender and hours worked.
  
  
  CONCLUSIONS
  The scale presents an opportunity in routine clinical practice to take positive action to reduce sickness absence and prevent job loss.
authors: Bowling Hall Medical Practice, Bradford, UK.
authors: Estelle
authors: E
authors: McFadden
authors: Mike C
authors: MC
authors: Horton
authors: Helen L
authors: HL
authors: Ford
authors: Gill
authors: G
authors: Gilworth
authors: Majella
authors: M
authors: McFadden
authors: Alan
authors: A
authors: Tennant
mesh_terms: D000041:Absenteeism; D000328:Adult; D016009:Chi-Square Distribution; D004739:England; D005260:Female; D006801:Humans; D007407:Interviews as Topic; D008297:Male; D008875:Middle Aged; D009103:Multiple Sclerosis / Q000175:diagnosis* / Q000503:physiopathology / Q000523:psychology; D011237:Predictive Value of Tests; D011594:Psychometrics; D015203:Reproducibility of Results; D018570:Risk Assessment; D012307:Risk Factors; D018582:Sick Leave; D011795:Surveys and Questionnaires; D014478:Unemployment; D014938:Work Capacity Evaluation