Baseline characteristics of study participants, overall and stratified by M-protein isotype
| Characteristic . | All (n = 122) . | IgA (n = 39) . | IgG (n = 78) . | IgA/IgG (n = 5) . |
|---|---|---|---|---|
| Age, y, median (range) | 69 (45-86) | 69 (45-85) | 66 (48-86) | 78 (71-83) |
| Sex, male, n (%) | 73 (59.8) | 21 (53.8) | 48 (61.5) | 4 (80.0) |
| M-protein, g/L, median (range) | 3.2 (n.q. to 21.9) | 1.68 (n.q. to 5.8) | 4.32 (n.q. to 21.9) | 5.0 (n.q. to 12.0) |
| I/U FLC ratio, median (range) | 1.55 (1.00-41.8) | 1.74 (1.00-35.9) | 1.47 (1.01-41.76) | 1.30 (1.05-14.2) |
| Abnormal FLC levels (revised), n (%) | 26 (21.3) | 10 (25.6) | 15 (19.2) | 1 (20.0) |
| BMPC, %, median (range)∗ | 8.0 (2.5-65.5) | 8.0 (2.5-35.5) | 8.0 (2.5-65.5) | 13.0 (4.0-25.5) |
| Baseline diagnosis, n (%) | ||||
| MGUS | 91 (74.6) | 30 (76.9) | 59 (75.6) | 2 (40.0) |
| SMM | 29 (23.8) | 9 (23.1) | 17 (21.8) | 3 (60.0) |
| MM | 1 (0.8) | 0 (0.0) | 1 (1.3) | 0 (0.0) |
| CLL | 1 (0.8) | 0 (0.0) | 1 (1.3) | 0 (0.0) |
| NGF analysis of BM | ||||
| Clonal plasma cells detected, n (%) | 103 (84.4) | 37 (94.9) | 61 (78.2) | 5 (100.0) |
| Clonal plasma cells, % of† | ||||
| Nucleated cells, median (range) | 0.33 (0.00047-7.9) | 0.34 (0.0070-3.0) | 0.29 (0.00047-7.9) | 0.48 (0.23-1.13) |
| Total plasma cells, median (range) | 69.2 (1.5-99.9) | 63.7 (1.5-99.2) | 65.7 (2.8-99.9) | 89.3 (73.2-95.1) |
| Characteristic . | All (n = 122) . | IgA (n = 39) . | IgG (n = 78) . | IgA/IgG (n = 5) . |
|---|---|---|---|---|
| Age, y, median (range) | 69 (45-86) | 69 (45-85) | 66 (48-86) | 78 (71-83) |
| Sex, male, n (%) | 73 (59.8) | 21 (53.8) | 48 (61.5) | 4 (80.0) |
| M-protein, g/L, median (range) | 3.2 (n.q. to 21.9) | 1.68 (n.q. to 5.8) | 4.32 (n.q. to 21.9) | 5.0 (n.q. to 12.0) |
| I/U FLC ratio, median (range) | 1.55 (1.00-41.8) | 1.74 (1.00-35.9) | 1.47 (1.01-41.76) | 1.30 (1.05-14.2) |
| Abnormal FLC levels (revised), n (%) | 26 (21.3) | 10 (25.6) | 15 (19.2) | 1 (20.0) |
| BMPC, %, median (range)∗ | 8.0 (2.5-65.5) | 8.0 (2.5-35.5) | 8.0 (2.5-65.5) | 13.0 (4.0-25.5) |
| Baseline diagnosis, n (%) | ||||
| MGUS | 91 (74.6) | 30 (76.9) | 59 (75.6) | 2 (40.0) |
| SMM | 29 (23.8) | 9 (23.1) | 17 (21.8) | 3 (60.0) |
| MM | 1 (0.8) | 0 (0.0) | 1 (1.3) | 0 (0.0) |
| CLL | 1 (0.8) | 0 (0.0) | 1 (1.3) | 0 (0.0) |
| NGF analysis of BM | ||||
| Clonal plasma cells detected, n (%) | 103 (84.4) | 37 (94.9) | 61 (78.2) | 5 (100.0) |
| Clonal plasma cells, % of† | ||||
| Nucleated cells, median (range) | 0.33 (0.00047-7.9) | 0.34 (0.0070-3.0) | 0.29 (0.00047-7.9) | 0.48 (0.23-1.13) |
| Total plasma cells, median (range) | 69.2 (1.5-99.9) | 63.7 (1.5-99.2) | 65.7 (2.8-99.9) | 89.3 (73.2-95.1) |