title: The relationship between overweight and obesity, and sick leave: a systematic review.
abstract: OBJECTIVE
  To investigate the relationship between overweight and obesity and sick leave.
  
  
  METHODS
  Systematic, qualitative review.
  
  
  METHODS
  A search in diverse databases was performed. Studies were considered as relevant if they were longitudinal in design and investigated the relationship between overweight and obesity and sick leave.
  
  
  METHODS
  The methodological quality of the studies was evaluated with a quality criteria list. To draw conclusions, a best-evidence synthesis was applied.
  
  
  RESULTS
  Thirteen studies were included. Four out of seven found overweight to be a predictor of long-term sick leave, whereas the remaining three showed a positive trend, but did not observe significance. Of the five studies investigating the relationship between overweight and short-term sick leave, inconsistent results were shown. Seven out of eight studies investigating the relationship with long-term sick leave found obesity as a significant predictor of long-term sick leave. In contrast, there were inconsistent results between the five studies examining the relationship between obesity and short spells of sick leave.
  
  
  CONCLUSIONS
  Although this review found inconclusive evidence for a relationship between overweight and sick leave, a clear trend was discerned in that overweight was a predictor of especially long spells (>7 days) of sick leave. As regards obesity, there was strong evidence for a positive relationship with sick leave because of the consistent finding that obesity was a significant predictor of long-term sick leave.
authors.affiliation: Department of Public and Occupational Health and EMGO Institute for Health and Care Research, VU University Medical Center Amsterdam, Van der Boechorststraat 7, Amsterdam, The Netherlands.
authors.forename: D C
authors.initials: DC
authors.lastname: van Duijvenbode
authors.forename: M J M
authors.initials: MJ
authors.lastname: Hoozemans
authors.forename: M N M
authors.initials: MN
authors.lastname: van Poppel
authors.forename: K I
authors.initials: KI
authors.lastname: Proper
mesh_terms: D005260:Female; D006801:Humans; D008297:Male; D009765:Obesity / Q000453:epidemiology*; D009787:Occupational Medicine / Q000379:methods; D050177:Overweight / Q000453:epidemiology; D036301:Qualitative Research; D018582:Sick Leave / Q000706:statistics & numerical data*; D014938:Work Capacity Evaluation