Table 1 Clinical characteristics.

From: DNA methylation markers in the diagnosis and prognosis of common leukemias

Characteristic

AML

ALL

Normal

Total (n)

194

136

754

Gender

Femal-no. (%)

90 (46)

42 (31)

401 (53)

Male-no. (%)

104 (54)

94 (69)

353 (47)

Age at diagnosis (year)

Median

55

5

63

Range

18–88

1–13

19–101

White race-no/total no. (%)

White

176 (91)

0

504 (67)

Asian

2 (1)

136 (100)

7 (1)

Other

16 (8)

0

243 (32)

White cell count at diagnosis (×109/L)

Mean

37.94 ± 30.72

8.15 ± 5.78

NA

Median

17

5

NA

FAB subtype — no. (%)

AML with minimal maturation: M0

19 (10)

NA

NA

AML without maturation: M1

42 (22)

NA

NA

AML with maturation: M2

43 (22)

NA

NA

Acute promyelocytic leukemia: M3

19 (10)

NA

NA

Acute myelomonocytic leukemia: M4

41 (21)

NA

NA

Acute monoblastic or monocytic leukemia: M5

22 (11)

NA

NA

Acute erythroid leukemia: M6

3 (1.5)

NA

NA

Acute megakaryoblastic leukemia: M7

3 (1.5)

NA

NA

ALL-L1

NA

74 (55)

NA

ALL-L2

NA

37 (27)

NA

ALL-L3

NA

14 (10)

NA

Other subtype

2 (1)

11 (8)

NA

Cytogenetic risk group-no (%)

Favorable (Low risk)

36 (19)

19 (14)

NA

Intermediate (Standard risk)

110 (57)

64 (47)

NA

Unfavorable (High/Very high risk)

43 (22)

39 (29)

NA

Missing data

3 (2)

14 (10)

NA

  1. ALL-L1: Small cells with homogeneous nuclear chromatin, a regular nuclear shape, small or no nucleoli, scanty cytoplasm, and mild to moderate
  2. ALL-L2: Large, heterogeneous cells with variable nuclear chromatin, an irregular nuclear shape, 1 or more nucleoli, a variable amount of cytoplasm, and variable basophilia
  3. ALL-L3: Large, homogeneous cells with fine, stippled chromatin; regular nuclei; prominent nucleoli; and abundant, deeply basophilic cytoplasm. The most distinguishing feature is prominent cytoplasmic vacuolation