| Methods |
Random allocation (exact method and concealment not stated) |
| Participants |
Psoriatic arthritis
Mean age 40, mean duration 6 years
N=27 |
| Interventions |
Fumaric acid 120mg/day versus placebo tablet |
| Outcomes |
Morning stiffness, pain score, global assessment, grip strength, joint index, laboratory measures
16 weeks duration |
| Notes |
Four variables included in analysis
7% dropouts. |
| Risk of bias |
| Bias |
Authors' judgement |
Support for judgement |
| Allocation concealment (selection bias) |
Unclear risk |
B ‐ Unclear |
