Variable | Total | % | Mean/median | Range |
---|---|---|---|---|
Age (years) | 5.77/5.16 | 1.23–13.35 | ||
< 10 | 211 | 87.6 | ||
≥ 10 | 30 | 12.4 | ||
WBC | 76.5/17 | 0.4–880 | ||
< 50 × 109 | 161 | 66.8 | ||
≥ 50 × 109 | 80 | 33.2 | ||
Gender | ||||
Female | 103 | 43.5 | ||
Male | 134 | 56.5 | ||
Down syndrome | ||||
No | 224 | 94.5 | ||
Yes | 13 | 5.5 | ||
NCI risk | ||||
Standard | 145 | 61.2 | ||
High | 92 | 38.8 | ||
Steroid pretreatment | ||||
No | 231 | 97.5 | ||
Yes | 6 | 2.5 | ||
Immunophenotype | ||||
B-cell | 196 | 82.7 | ||
T-cell | 41 | 17.3 | ||
CNS status | ||||
CNS1 | 185 | 78.1 | ||
CNS2 | 26 | 11.0 | ||
CNS3 | 24 | 10.1 | ||
Missing | 2 | 0.8 | ||
Testes (male only) | ||||
Not involved | 131 | 97.8 | ||
Involved | 3 | 2.2 | ||
Cytogenetic group | ||||
Normal | 41 | 17.3 | ||
Hyperdiploidy | 64 | 27.0 | ||
Double trisomy (+) | 36a | |||
Double trisomy (−) | 28a | |||
ETV6/RUNX1 | 23 | 9.7 | ||
iAMP(21) | 5b | |||
t(1;19) | 6 | 2.5 | ||
MLLR | 9 | 3.8 | ||
Other | 81 | 34.2 | ||
Hypodiploidy (< 44) | 0 | 0.0 | ||
Not available | 9 | 3.8 | ||
Philadelphia | 4 | 1.7 |