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Table 1 Characteristics of studies and publication status

From: Can UK NHS research ethics committees effectively monitor publication and outcome reporting bias?

 

Publication status of all studies (n = 116)

Reporting outcomes of published studies (n = 28)

 

Published 37 (32 %)

Unpublished 79 (68 %)

Total 116

Studies with discrepancies 16 (57 %)

Studies consistent with IRAS form 12 (43 %)

Total 28

Study type

      

Clinical trial

10 (27 %)

27 (73 %)

37 (32 %)

3 (75 %)

1 (25 %)

4 (14 %)

Clinical Investigation

2 (25 %)

6 (75 %)

8 (7 %)

1 (50 %)

1 (50 %)

2 (7 %)

Questionnaire/mixed methodology

13 (57 %)

10 (43 %)

23 (20 %)

8 (62 %)

5 (38 %)

13 (46 %)

Qualitative study

3 (33 %)

6 (67 %)

9 (8 %)

2 (67 %)

1 (33 %)

3 (11 %)

Tissue or data

4 (27 %)

11 (73 %)

15 (13 %)

1 (25 %)

3 (75 %)

4 (14 %)

Other

1 (13 %)

7 (87 %)

8 (7 %)

1 (100 %)

0 (0 %)

1 (4 %)

Unknown study type

4 (25 %)

12 (75 %)

16 (14 %)

0 (0 %)

1 (100 %)

1 (4 %)

Type of sponsor

      

NHS or HPSS

16 (35 %)

30 (65 %)

46 (40 %)

7 (50 %)

7 (50 %)

14 (50 %)

Academic

13 (38 %)

21 (62 %)

34 (29 %)

7 (58 %)

5 (42 %)

12 (43 %)

Industry

3 (12 %)

21 (88 %)

24 (21 %)

2 (100 %)

0 (0 %)

2 (7 %)

Unknown sponsor

5 (42 %)

7 (58 %)

12 (10 %)

N/A

N/A

 

Number of centres

      

Single centre

11 (70 %)

26 (30 %)

37 (32 %)

7 (63 %)

4 (36 %)

11 (39 %)

Multi-centre

21 (33 %)

42 (67 %)

63 (54 %)

9 (53 %)

8 (47 %)

17 (61 %)

Unknown

5 (31 %)

11 (69 %)

16 (14 %)

N/A

N/A

 

Sample size

      

<100

14 (29 %)

34 (71 %)

48 (41 %)

7 (50 %)

7 (50 %)

14 (50 %)

≥100

14 (30 %)

33 (70 %)

47 (41 %)

9 (63 %)

5 (36 %)

14 (50 %)

Unknown sample size

9 (43 %)

12 (57 %)

21 (18 %)

N/A

N/A

 

Number of papers

      

1

N/A

N/A

 

11 (58 %)

8 (42 %)

19 (68 %)

>1

N/A

N/A

 

5 (56 %)

4 (44 %)

9 (32 %)

  1. Percentages may not add up to 100 due to rounding. Stratification taken from the REC application form with “unknown” referring to either a missing form or data missing from the application