Clinical Study
Sex Variability in Pediatric Leukemia Survival: Large Cohort Evidence
Table 3
Mortality associated with sex in pediatric patients diagnosed with leukemia, 1973–2006.
| Covariates | AHR | 99% CI | P |
| Sex | | | | Boys | 1.0 | Ref | Ref | Girls | 0.88 | 0.81–0.95 | <0.0001 | Race | | | | White | 1.0 | Ref | Ref | Black | 1.47 | 1.31–1.66 | <0.0001 | Age at diagnosis (years) | | | | <1.0 | 1.0 | Ref | Ref | 1.0−4.0 | 0.24 | 0.21–0.28 | <0.0001 | 5.0–9.0 | 0.31 | 0.26–0.37 | <0.0001 | 10.0–14.0 | 0.54 | 0.46–0.62 | <0.0001 | 15.0−19.0 | 0.83 | 0.71–0.96 | 0.001 | Year of diagnosis | | | | 1973–1977 | 1.0 | Ref | Ref | 1978–1982 | 0.70 | 0.61–0.81 | <0.0001 | 1983–1987 | 0.57 | 0.49–0.65 | <0.0001 | 1988–1992 | 0.40 | 0.35–0.47 | <0.0001 | 1993–1997 | 0.36 | 0.32–0.42 | <0.0001 | 1998–2002 | 0.30 | 0.26–0.34 | <0.0001 | 2003–2006 | 0.27 | 0.23–0.31 | <0.0001 | Number of primaries | | | | 1.0 | 1.0 | Ref | Ref | ≥ 2.0 | 1.32 | 1.10–1.33 | 0.002 | Radiation | | | | Yes | 1.0 | Ref | Ref | No | 1.21 | 1.10–1.33 | <0.0001 |
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Notes and abbreviations: the significance level was 0.01. CI = confidence interval. AHR = adjusted hazard ratio, ref = the reference group or class.
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