Outline of the number of patients in whom the appropriate questions, extra-articular manifestations and laboratory investigations had been undertaken and documented
| Question | Response recorded? | Question | Response recorded? |
|---|---|---|---|
| CBP improves with rest? | 2/34 | Enthesitis? | 4/30 |
| CBP improves with exercise? | 2/34 | Dactylitis? | 3/34 |
| Night pain? | 2/34 | Improvement with NSAIDs? | 14/34 |
| CBP duration >3 months | 17/34 | Family history of ankylosing spondylitis? | 1/34 |
| Early morning stiffness? | 8/34 | HLA-B27 checked? | 11/34 |
| CBP causing early morning wakening? | 0/34 | ESR or CRP checked? | 5/34 |
| Alternating buttock pain? | 1/34 | Presence of IBD? | 4/34 |
CBP, chronic back pain; CRP, C reactive protein; ESR, erythrocyte sedimentation rate; HLA, human leucocyte antigen; IBD, inflammatory bowel disease; NSAID, non-steroidal anti-inflammatory drug.