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Table 8 The distribution of leukemia subtypes in three age categories (1999–2013)

From: The burden of leukemia in the Kingdom of Saudi Arabia: 15 years period (1999–2013)

Variables Children Adults Elderly  
Morphology No. % No. % No. % P value
Precursor B-cell lymphoblastic leukemia 1,215 36.6 388 10.2 27 1.7 0.001
Precursor cell lymphoblastic leukemia, NOS 1,043 31.4 404 10.6 58 3.6  
Precursor T-cell lymphoblastic leukemia 177 5.3 144 3.8 2 0.1  
Acute myeloid leukemia, NOS 250 7.5 554 14.6 236 14.8  
Acute leukemia, NOS 68 2.0 78 2.1 52 3.3  
Acute monocytic leukemia 55 1.7 126 3.3 53 3.3  
Leukemia, NOS 34 1.0 84 2.2 100 6.3  
Acute myelomonocytic leukemia 37 1.1 127 3.3 35 2.2  
Acute myeloid leukemia with maturation 45 1.4 91 2.4 30 1.9  
Acute myeloid leukemia without maturation 18 0.5 60 1.6 25 1.6  
Acute promyelocytic leukemia, t(15;17)(q22;q11–12) 61 1.8 220 5.8 34 2.1  
B-cell chronic lymphocytic leukemia/small lymphocytic lymphoma 2 0.1 229 6.0 519 32.5  
Chronic myelogenous leukemia, BCR/ABL positive 4 0.1 86 2.3 17 1.1  
Chronic myeloid leukemia, NOS 59 1.8 875 23.0 197 12.4  
All others 250 7.5 333 8.8 210 13.2