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Table 2 Categorization of included studies

From: Hearing difficulties, ear-related diagnoses and sickness absence or disability pension - a systematic literature review

First author, year Study design Study group Outcome
Cohort Intervention Cross-sectional Population Employed Patients Sick leave Disability pension
Carlsson [16], 2011 X      X X  
Gustafsson [17], 2011 X    X    X X
Neuhauser [10], 2008    X X    X  
Skøien [18], 2008 X    X    X X
Ide [29], 2007    X   X    X
Bjerlemo [19], 2006 X      X X  
Kramer [20], 2006    X   X   X  
Hagberg [21], 2005 X     X*   X  
Gates [22], 2004   X     X X  
Chau [23], 2004    X   X   X  
Sewell [30], 2004 X     X    X
Bjorne [24], 2003   X    X X X  
Joore [25], 2003   X     X X  
Andersson [27], 2000 X      X X  
Holgers [26], 2000 X      X X  
Ide [31], 1998    X   X    X
Starzynski [32], 1993 X     X    X
Rudin [28], 1987 X    X    X  
  1. * Former students.