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Table 1 Trial quality by decade of publication

From: Faecal blood loss with aspirin, nonsteroidal anti-inflammatory drugs and cyclo-oxygenase-2 selective inhibitors: systematic review of randomized trials using autologous chromium-labelled erythrocytes

Decade

Quality score

Total

 

1

2

3

4

5

 

1960s

   

2

 

2

1970s

 

5

 

3

1

9

1980s

1

11

5

7

2

26

1990s

 

5

 

3

 

8

2000s

  

1

 

1

2

Total

1

21

6

15

4

47

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Arthritis Research & Therapy

ISSN: 1478-6362

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