TABLE 1.
Baseline characteristics of patients with Waldenström macroglobulinemia with or without extramedullary disease.
| Characteristics | Patients with EMD (n = 30) | Patients without EMD (n = 439) | p |
|---|---|---|---|
| Age (years) | |||
| Median (range) | 68 (38–84) | 73 (41–96) | 0.02 |
| Sex | |||
| M/F ratio | 1.5 | 1.5 | 0.99 |
| IgM (g/L) | |||
| Median (range) | 15.6 (1.2–78.1) | 16.6 (1.1–109) | 0.95 |
| Missing data (n) | 1 | 3 | |
| Hemoglobin (g/dL) | |||
| Median (range) | 11.6 (5.8–15.5) | 12.4 (5.1–19.2) | 0.03 |
| Missing data (n) | 1 | 2 | |
| Platelet count (109/L) | |||
| Median (range) | 255 (56–574) | 257 (1–1207) | 0.72 |
| Missing data (n) | 1 | 3 | |
| β2M (g/dL) | |||
| Median (range) | 4.5 (1.6–7.7) | 3.0 (1.3–16.1) | 0.02 |
| Missing data (n) | 8 | 53 | |
| LDH | |||
| Median (range) | 161 (106–600) | 164 (60–1600) | 0.44 |
| Missing data (n) | 1 | 8 | |
| Albumin (g/L) | |||
| Median (range) | 35 (20–46) | 36 (12–47) | 0.44 |
| Missing data (n) | 1 | 11 | |
| Symptomatic disease | |||
| n (%) | 22 (73) | 260 (59) | 0.13 |
Abbreviations: β2M, beta‐2 microglobulin; EMD, extramedullary disease; IgM, immunoglobulin M; LDH, lactate dehydrogenase.