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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