Table 1. Characteristics of childhood BCP-ALL cases and controls.
| Cases |
Controls |
|||
|---|---|---|---|---|
| n | % | n | % | |
| Total | 567 | 100 | 892 | 100 |
| Sex | ||||
| Male | 298 | 52.6 | 495 | 55.5 |
| Female | 269 | 47.4 | 397 | 44.5 |
| Age (years) | ||||
| 0-1 | 51 | 9.0 | 111 | 12.4 |
| 2-5 | 340 | 60.0 | 460 | 51.6 |
| 6-10 | 114 | 20.1 | 210 | 23.5 |
| 11-14 | 62 | 10.9 | 111 | 12.4 |
| Self-reported race/ethnicity | ||||
| White, non-Hispanic | 241 | 42.5 | 426 | 47.8 |
| Hispanic | 326 | 57.5 | 466 | 52.2 |
| BCP-ALL subtype a | ||||
| cALLb | 309 | 49.8 | NA | NA |
| Non-cALL | 258 | 41.5 | NA | NA |
| High-hyperdiploid | 178 | 28.7 | NA | NA |
| TEL-AML1 | 96 | 15.5 | NA | NA |
| Normal karyotype | 58 | 9.3 | NA | NA |
Abbreviations: BCP-ALL, B-cell precursor acute lymphoblastic leukemia; cALL, common ALL; NA, not applicable
a Categories of ALL subtypes are not mutually exclusive. Percentages do not equal to 100. Cytogenetic data were available for 87% of patients.
b cALL is defined as CD10+ and CD19+ ALL diagnosed between age 2-5 years.