Table II:
Demographics n= 146 eligible patients
| Characteristics | Number (%) |
|---|---|
| Male | 84 (58%) |
| Female | 62 (42%) |
| Age, years (median, range)* | 8 (0–25) |
| Presenting WBC, average (x 109/l) | 40.4 ± 14 |
| Race@ | |
| Caucasian | 103 (70%) |
| African-American | 21 (14%) |
| Asian/Hawaiian/Pacific Islander | 7 (5%) |
| Native American | 2 (1%) |
| Mixed Race or Other | 12 (8%) |
| Ethnicity | |
| Hispanic or Latina | 38 (26%) |
| Non-Hispanic or Latina | 108 (74%) |
| Site/timing of relapse for pre-B (n=110) | |
| BM, very early (<18 months) | 46 (42%) |
| BM, early (18–36 months) | 50 (45%) |
| Combined, very early | 3 (2.7%) |
| Combined, early | 11 (10%) |
| Lineage/strata (evaluable) | |
| Stratum I: very early, pre-B** | 46 |
| Stratum II: early, pre-B*** | 53 |
| Stratum III: pre-B >21 years old | 4 |
| Stratum IV: T-cell ALL | 22 |
| Stratum V: T-cell lymphoma# | 10 |
*
Age from diagnosis to relapse at study enrolment
**
very early relapse = <18 months from initial diagnosis.
***
early relapse = 18–36 months from diagnosis. # with or without central nervous system or extramedullary. @Race percentages total <100% due to rounding.
ALL: acute lymphoblastic leukaemia; BM: bone marrow; WBC: white blood cell count.