Univariate analysis of seven factors significantly related to the risk of relapse/recurrence of polymyalgia rheumatica based on the Kaplan-Meier method
| Variables | Number | Relapse /recurrence | p | Estimated relative hazard (95% confidence intervals) |
|---|---|---|---|---|
| Peripheral arthritis | ||||
| Presence | 50 | 24 | 0.04 | 1.44 (0.62, 3.33) |
| Absence | 41 | 16 | 1.0 (reference) | |
| Distal extremity swelling with pitting oedema | ||||
| Presence | 12 | 4 | 0.02 | 1.0 (reference) |
| Absence | 79 | 36 | 1.67 (0.47, 6.02) | |
| ESR (mm 1st h) | ||||
| ⩽72 | 41 | 14 | 0.02 | 1.0 (reference) |
| >72 | 50 | 26 | 2.09 (0.89, 4.89) | |
| HLA-DR1 | ||||
| Presence | 17 | 9 | 0.01 | 1.56 (0.54, 4.50) |
| Absence | 74 | 31 | 1.0 (reference) | |
| HLA-DR10 | ||||
| Presence | 3 | 2 | 0.005 | 2.63 (0.23, 30.11) |
| Absence | 88 | 38 | 1.0 (reference) | |
| Rheumatoid epitope | ||||
| Presence | 27 | 15 | 0.02 | 1.95 (0.79, 4.85) |
| Absence | 64 | 25 | 1.0 (reference) | |
| Type of rheumatoid epitope | ||||
| 1 | 7 | 4 | 0.001 | 2.07 (0.43, 10) |
| 2 | 15 | 9 | 2.33 (0.75, 7.30) | |
| 3 | 69 | 27 | 1.0 (reference) | |