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Table 1 Randomised double blind trials of opioids in chronic non-malignant pain of different aetiology

From: Prevalence of opioid adverse events in chronic non-malignant pain: systematic review of randomised trials of oral opioids

 

Number of

 

Number of

Condition

Trials

Patients

Drug treaments

Trial arms

Contributing patients

Arthritis

16

2990

Opioid

24

2173

   

Placebo

7

445

   

Other comparator

2

447

Musculoskeletal

10

1648

Opioid

18

1561

   

Placebo

4

302

   

Other comparator

0

0

Neuropathic

5

302

Opioid

5

219

   

Placebo

4

178

   

Other comparator

1

46

Mixed conditions

3

606

Opioid

6

606

   

Placebo

1

49

   

Other comparator

0

0