Cohort | |||
---|---|---|---|
Criteria | Screening(n=950) | Referral(n=670) | Validation(n=334) |
C1: Morning stiffness >30 min | 22.0% | 30.8% | 32.9% |
C2: Improvement by movement not by rest | 60.4% | 72.4% | 65.6% |
C3: Waking up in the second half of the night because of back pain | 38.9% | 54.9% | 46.4% |
C4a: Improvement with NSAIDs within 48 h (in the whole cohort) | 44.6% | 57.0% | 55.4% |
C4b: Improvement with NSAIDs within 48 h (if taken) | 73.6% | 80.9% | 76.4% |
NSAID, non-steroidal anti-inflammatory drug.