Multivariate logistic regression of risk factors for major infections in the training set
| Predictors for major infection within first 4 months | OR (95% CI) | P value |
| Age >40 years | 2.12 (0.96 to 4.69) | 0.065 |
| SLEDAI >10 | 3.28 (1.26 to 8.57) | 0.015 |
| Gastrointestinal involvement | 1.70 (0.55 to 5.24) | 0.356 |
| Nephritis | 1.92 (0.77 to 4.77) | 0.161 |
| Lymphocyte count <0.8×109/L | 4.18 (1.90 to 9.17) | <0.0001 |
| Platelet count <100×109/L | 2.21 (0.98 to 4.96) | 0.055 |
| Serum creatinine >104 µmol/L | 7.16 (2.82 to 18.17) | <0.0001 |
| Prednisone* | 2.40 (0.97 to 5.92) | 0.057 |
| Immunosuppressants* | 0.64 (0.23 to 1.78) | 0.39 |
| Hydroxychloroquine* | 0.75 (0.34 to 1.66) | 0.482 |
*Administration of these drugs before enrolment.
SLEDAI, SLE Disease Activity Index.