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Table 2 Nature of reported primary outcome discrepancies

From: Comparison of registered and published outcomes in randomized controlled trials: a systematic review

Study Included trials; N Published articles with new primary outcome; N (%) Registered primary outcome not reported in published article; N (%) Registered primary outcome reported as secondary in published article; N (%) Published primary outcome described as secondary in registry; N (%) Timing of primary outcome assessment differs between registry and article; N (%)
Chahal et al., 2012 [18] 20 3 (15)   4 (20)   
Ewart et al., 2009 [15] 110 10 (9) 20 (18) 6 (5) 3 (3)  
Gandhi et al., 2011 [19] 20 0 (0) 2 (10) 0 (0) 0 (0)  
Hannink et al., 2013 [20] 152 24 (16) 32 (21) 8 (5) 14 (9) 9 (6)
Huić et al., 2011 [22] 152 49 (32) 2 (1) 7 (5) 1 (1)  
Jones et al., 2012 [24] 57 9 (16) 3 (5) 10 (18) 9 (16) 5 (9)
Killeen et al., 2014 [26] 108 9 (8) 9 (8) 6 (6) 6 (6) 7 (6)
Li et al., 2013 [27] 155 7 (5) 5 (3) 9 (6) 6 (4) 6 (4)
Mathieu et al., 2009 [7] 147 22 (15) 15 (10) 6 (4) 8 (5) 4 (3)
Milette K et al., 2011 [30] 1 0 (0) 1 (100) 0 (0) 0 (0) 0 (0)
Nankervis et al., 2012 [31] 8 2 (25)     1 (13)
Pinto et al., 2013 [32] 62 12 (19) 8 (13) 17 (27) 6 (10) 18 (29)
Rosenthal et al., 2013 [33] 51 10 (20) 9 (18) 11 (22) 7 (14) 12 (24)
Smith et al., 2012 [34] 25 2 (8) 3 (12) 2 (8)   
Smith et al., 2013 [9] 79 4 (5) 5 (6) 6 (8) 2 (3) 38 (48)
Walker et al., 2014 [36] 75 10 (13) 2 (3) 2 (3) 1 (1) 5 (7)
Wildt et al., 2011 [37] 66 0 (0) 0 (0) 0 (0) 0 (0) 0 (0)
Totals 1288 173 (13) 116 (9) 94 (7) 63 (5) 105 (8)
  1. Not all studies provided data for each possible category