Percent bone marrow hematogones by age group for all specimens (n = 662) and specimens with fewer than 50% neoplastic cells (n = 588)
| Patient age, y . | All specimens (n = 662) . | Specimens with < 50% neoplastic cells (n = 588) . | Density gradient separation–processed . | Ammonium chloride lysis–processed . | Significance of differences in mean % by method of processing* . | |||
|---|---|---|---|---|---|---|---|---|
| All specimens (n = 345) . | Specimens with < 50% neoplastic cells (n = 303) . | All specimens (n = 317) . | Specimens with < 50% neoplastic cells (n = 285) . | All specimens . | Specimens with < 50% neoplastic cells . | |||
| < 2 | 9.0 (2.6) | 11.0 (4.2) | 11.4 (2.6) | 11.4 (2.6) | 4.8 (4.5) | 9.6 (9.6) | .52 | .895 |
| n = 11 | n = 9 | n = 7 | n = 7 | n = 4 | n = 2 | |||
| 2-5 | 3.9 (0.27) | 7.0 (6.3) | 3.8 (0.2) | 8.1 (7.7) | 4.4 (0.35) | 5.5 (4.8) | .89 | .58 |
| n = 18 | n = 10 | n = 13 | n = 6 | n = 5 | n = 4 | |||
| 6-15 | 2.1 (0.05) | 3.6 (1.1) | 2.2 (0) | 5.3 (1.9) | 1.9 (0.27) | 2.6 (0.9) | .85 | .33 |
| n = 32 | n = 18 | n = 17 | n = 7 | n = 15 | n = 11 | |||
| 16-50 | 2.3 (1.1) | 2.5 (1.1) | 3.2 (1.4) | 3.4 (1.5) | 1.4 (0.5) | 1.5 (0.61) | .008 | .01 |
| n = 231 | n = 212 | n = 115 | n = 107 | n = 116 | n = 105 | |||
| > 50 | 0.8 (0.2) | 0.9 (0.27) | 1.1 (0.3) | 1.2 (0.30) | 0.5 (0.16) | 0.57 (0.20) | < .001 | < .001 |
| n = 370 | n = 339 | n = 193 | n = 176 | n = 177 | n = 163 | |||
| Patient age, y . | All specimens (n = 662) . | Specimens with < 50% neoplastic cells (n = 588) . | Density gradient separation–processed . | Ammonium chloride lysis–processed . | Significance of differences in mean % by method of processing* . | |||
|---|---|---|---|---|---|---|---|---|
| All specimens (n = 345) . | Specimens with < 50% neoplastic cells (n = 303) . | All specimens (n = 317) . | Specimens with < 50% neoplastic cells (n = 285) . | All specimens . | Specimens with < 50% neoplastic cells . | |||
| < 2 | 9.0 (2.6) | 11.0 (4.2) | 11.4 (2.6) | 11.4 (2.6) | 4.8 (4.5) | 9.6 (9.6) | .52 | .895 |
| n = 11 | n = 9 | n = 7 | n = 7 | n = 4 | n = 2 | |||
| 2-5 | 3.9 (0.27) | 7.0 (6.3) | 3.8 (0.2) | 8.1 (7.7) | 4.4 (0.35) | 5.5 (4.8) | .89 | .58 |
| n = 18 | n = 10 | n = 13 | n = 6 | n = 5 | n = 4 | |||
| 6-15 | 2.1 (0.05) | 3.6 (1.1) | 2.2 (0) | 5.3 (1.9) | 1.9 (0.27) | 2.6 (0.9) | .85 | .33 |
| n = 32 | n = 18 | n = 17 | n = 7 | n = 15 | n = 11 | |||
| 16-50 | 2.3 (1.1) | 2.5 (1.1) | 3.2 (1.4) | 3.4 (1.5) | 1.4 (0.5) | 1.5 (0.61) | .008 | .01 |
| n = 231 | n = 212 | n = 115 | n = 107 | n = 116 | n = 105 | |||
| > 50 | 0.8 (0.2) | 0.9 (0.27) | 1.1 (0.3) | 1.2 (0.30) | 0.5 (0.16) | 0.57 (0.20) | < .001 | < .001 |
| n = 370 | n = 339 | n = 193 | n = 176 | n = 177 | n = 163 | |||
Entries are mean percentages (median) unless otherwise stated.
P values.