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Table 3 Methodological quality of the included studies

From: Determinants of physical activity and exercise in healthy older adults: A systematic review

   Item* Quality score %
Reference 1 2 3 4 5 6 7 8  
Boyette et al., 1997   ? + + - 0.17 0.17 - - 29
Brassington et al., 2002   ? + ? - 0 0 + + 38
Burton et al., 1999   ? - + - 0.45 0.45 + + 49
Cheung et al., 2007   ? + ? - 0 0 + - 25
Costanzo and Walker 2008   + + ? - 0 0 + + 50
Cluster 1** Garcia and King, 1991 ? ? ? - 0.69 0.62 + + 41
  King et al., 1997 ? ? ? - 0.6 0.6 + + 40
  Oka et al., 1995 - ? ? - 0.33 0.33 + - 21
  Oman and King, 1998 - ? ? - 0.5 0.5 + + 38
Cluster 2** McAuley et al., 2003 ? + ? - 0 0 + + 38
  McAuley et al., 2007 ? + ? - 0.7 0.8 + + 56
Dubbert et al., 2002   ? + ? - 0.14 0.14 + + 41
Emery et al., 1992   ? + ? - 0.25 0.25 - - 19
Finkelstein et al., 2008   ? + ? + 1 1 + - 63
Hirvensalo et al., 2000   ? ? ? - 0.25 0.25 + ? 19
Jancey et al., 2007   - - - - 0.71 0.43 + + 39
Kahana et al., 2005   ? ? ? - 0.50 0.50 + + 38
Li et al., 2001   ? - - - 0 0 + + 25
Li et al., 2005   ? + ? - 0.43 0.29 + + 47
Lucidi et al., 2006   + + ? - 0 0 + + 50
Michael et al., 2010§   ? + + - 1 1 + + 75
Morey et al., 2003   - + ? - 0.29 0.29 + - 32
Nitz and Choy, 2007   ? + ? - 0.09 0.09 - - 15
Oman and King, 2000   ? + ? - 0 0 + - 25
Rhodes et al., 2001   ? + ? - 0 0 + - 25
Sarkisian et al., 2007   ? + ? + 0 0 + + 50
Shaw and Spokane, 2008   + ? ? - 0.40 0.40 + + 48
Shimada et al., 2007   + - ? - 0.67 0.67 + + 54
Stiggelbout et al., 2006   + + ? - 0 0 + + 50
Touvier et al., 2010   ? ? ? - 0.67 1 + + 46
Tu et al., 2004   ? ? ? - 0.56 0.56 + + 39
Wilcox and King, 2004   ? + ? - 0 0 + - 25
Williams and Lord, 1995   ? - ? - 0.12 0.12 + - 16
Yasunaga et al., 2008§   ? + + + 1 1 + + 88
  1. * Item number corresponds with item description in Table 1
  2. ** Cluster of multiple manuscripts reporting on the same original data set
  3. § Manuscripts with a percentage of 70% or more were considered high quality