Baseline characteristics
Characteristic . | Whites, N = 2300 . | African Americans, N = 270 . | P . |
|---|---|---|---|
| Median age, y | 54 | 48 | < .001 |
| Minimum | 16 | 17 | |
| Maximum | 86 | 86 | |
| Sex, n (%) | < .001 | ||
| Men | 1233 (54) | 114 (42) | |
| Women | 1067 (46) | 156 (58) | |
| Performance status, n (%) | .21 | ||
| 0 | 673 (30) | 67 (25) | |
| 1 | 1015 (45) | 117 (44) | |
| 2 | 431 (19) | 59 (22) | |
| 3 | 111 (5) | 16 (6) | |
| 4 | 28 (1) | 6 (2) | |
| Extramedullary leukemia, n (%) | |||
| Liver | .91 | ||
| No | 2041 (90) | 239 (91) | |
| Yes | 215 (10) | 24 (9) | |
| Spleen | .73 | ||
| No | 2051 (91) | 244 (92) | |
| Yes | 203 (9) | 22 (8) | |
| CNS | .04 | ||
| No | 2236 (99) | 261 (98) | |
| Yes | 14 (≤ 1) | 5 (2) | |
| PNS | .72 | ||
| No | 2255 (99) | 267 (> 99) | |
| Yes | 14 (≤ 1) | 1 (< 1) | |
| Nodes | .44 | ||
| No | 1968 (87) | 226 (85) | |
| Yes | 291 (13) | 39 (15) | |
| Skin | .02 | ||
| No | 2086 (92) | 258 (96) | |
| Yes | 170 (8) | 10 (4) | |
| Gum | .76 | ||
| No | 2002 (89) | 235 (88) | |
| Yes | 255 (11) | 32 (12) | |
| Mass | .73 | ||
| No | 2237 (99) | 265 (99) | |
| Yes | 20 (1) | 3 (1) | |
| Median WBC count, × 109/L | 13 700 | 16 300 | .39 |
| Minimum | 100 | 300 | |
| Maximum | 560 000 | 301 000 | |
| Median platelet level, × 109/L | 54 000 | 57 000 | .52 |
| Minimum | 4000 | 2000 | |
| Maximum | 1 200 000 | 426 000 | |
| Median Hgb level, g/L | 92 | 90 | .59 |
| Minimum | 28 | 35 | |
| Maximum | 149 | 150 | |
| Histology, FAB, n (%) | .04 | ||
| M0 | 49 (2) | 9 (3) | |
| M1 | 497 (22) | 52 (19) | |
| M2 | 678 (29) | 84 (31) | |
| M3 | 144 (6) | 31 (11) | |
| M4 | 539 (23) | 61 (23) | |
| M5 | 251 (11) | 19 (7) | |
| M6 | 70 (3) | 6 (2) | |
| M7 | 13 (1) | 1 (< 1) | |
| Other | 24 (1) | 3 (1) | |
| Missing | 35 (2) | 4 (1) |
Characteristic . | Whites, N = 2300 . | African Americans, N = 270 . | P . |
|---|---|---|---|
| Median age, y | 54 | 48 | < .001 |
| Minimum | 16 | 17 | |
| Maximum | 86 | 86 | |
| Sex, n (%) | < .001 | ||
| Men | 1233 (54) | 114 (42) | |
| Women | 1067 (46) | 156 (58) | |
| Performance status, n (%) | .21 | ||
| 0 | 673 (30) | 67 (25) | |
| 1 | 1015 (45) | 117 (44) | |
| 2 | 431 (19) | 59 (22) | |
| 3 | 111 (5) | 16 (6) | |
| 4 | 28 (1) | 6 (2) | |
| Extramedullary leukemia, n (%) | |||
| Liver | .91 | ||
| No | 2041 (90) | 239 (91) | |
| Yes | 215 (10) | 24 (9) | |
| Spleen | .73 | ||
| No | 2051 (91) | 244 (92) | |
| Yes | 203 (9) | 22 (8) | |
| CNS | .04 | ||
| No | 2236 (99) | 261 (98) | |
| Yes | 14 (≤ 1) | 5 (2) | |
| PNS | .72 | ||
| No | 2255 (99) | 267 (> 99) | |
| Yes | 14 (≤ 1) | 1 (< 1) | |
| Nodes | .44 | ||
| No | 1968 (87) | 226 (85) | |
| Yes | 291 (13) | 39 (15) | |
| Skin | .02 | ||
| No | 2086 (92) | 258 (96) | |
| Yes | 170 (8) | 10 (4) | |
| Gum | .76 | ||
| No | 2002 (89) | 235 (88) | |
| Yes | 255 (11) | 32 (12) | |
| Mass | .73 | ||
| No | 2237 (99) | 265 (99) | |
| Yes | 20 (1) | 3 (1) | |
| Median WBC count, × 109/L | 13 700 | 16 300 | .39 |
| Minimum | 100 | 300 | |
| Maximum | 560 000 | 301 000 | |
| Median platelet level, × 109/L | 54 000 | 57 000 | .52 |
| Minimum | 4000 | 2000 | |
| Maximum | 1 200 000 | 426 000 | |
| Median Hgb level, g/L | 92 | 90 | .59 |
| Minimum | 28 | 35 | |
| Maximum | 149 | 150 | |
| Histology, FAB, n (%) | .04 | ||
| M0 | 49 (2) | 9 (3) | |
| M1 | 497 (22) | 52 (19) | |
| M2 | 678 (29) | 84 (31) | |
| M3 | 144 (6) | 31 (11) | |
| M4 | 539 (23) | 61 (23) | |
| M5 | 251 (11) | 19 (7) | |
| M6 | 70 (3) | 6 (2) | |
| M7 | 13 (1) | 1 (< 1) | |
| Other | 24 (1) | 3 (1) | |
| Missing | 35 (2) | 4 (1) |
CNS indicates central nervous system; PNS, peripheral nervous system; and Hgb, hemoglobin.