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Table 2 Age-group average incidence rates of two immunophenotypes in acute lymphoid leukemia in children from Mexico City (2006-2007)

From: Childhood acute leukemias are frequent in Mexico City: descriptive epidemiology

     Age Group (years)      
Immuno-phenotype   < 1 y   1-4 y   5-9 y   10-14 y   Total  
in ALL n AAIR* n AAIR* n AAIR* n AAIR* n AAIR* SAAIR*
T-Cell 0 0 13 12.0 8 6.0 3 2.1 24 5.9 6.3
Pre B 3 12.2 58 53.6 46 34.2 35 24.8 142 34.8 35.8
  1. AAIR: average annual incidence rate; SAAIR: standardized AAIR; ALL: acute lymphoid leukemia; Pre B: Precursor B cell. *Expressed per million children.