The relationship between SFLC and SIFE
| SIFE . | SFLC ratio . | ||||
|---|---|---|---|---|---|
| Normal . | Abnormal . | Discordant abnormal . | Concordant abnormal . | Normal or discordant abnormal . | |
| Positive | 802 (79%) | 1540 (94%) | 72 (72%) | 1468 (96%) | 874 (79%) |
| Negative | 210 (21%) | 96 (6%) | 28 (28%) | 68 (4%) | 238 (21%) |
| P | <.001 vs normal | .092 (vs normal) | <.001 vs discordant abnormal | <.001 vs concordant abnormal | |
| SIFE . | SFLC ratio . | ||||
|---|---|---|---|---|---|
| Normal . | Abnormal . | Discordant abnormal . | Concordant abnormal . | Normal or discordant abnormal . | |
| Positive | 802 (79%) | 1540 (94%) | 72 (72%) | 1468 (96%) | 874 (79%) |
| Negative | 210 (21%) | 96 (6%) | 28 (28%) | 68 (4%) | 238 (21%) |
| P | <.001 vs normal | .092 (vs normal) | <.001 vs discordant abnormal | <.001 vs concordant abnormal | |
SFLC indicates serum free light chain; and SIFE, serum immunofixation electrophoresis.