Spearman’s rank correlation coefficients of LFA-REAL musculoskeletal and LFA-REAL mucocutaneous with other disease activity scoring instruments
| LFA-REAL musculoskeletal | LFA-REAL mucocutaneous | |
| BILAG musculoskeletal | 0.842 | |
| SLEDAI arthritis | 0.817 | |
| Tender joint counts | 0.634 | |
| Swollen joint counts | 0.784 | |
| BILAG mucocutaneous | 0.826 | |
| SLEDAI mucocutaneous | 0.798 | |
| CLASI activity | 0.789 |
BILAG, British Isles Lupus Assessment Group Index; CLASI, Cutaneous Lupus Area and Severity Index ; LFA-REAL, Lupus Foundation of America-Rapid Evaluation of Activity in Lupus; SLEDAI, SLE Disease Activity Index.