Table 1 Comparison of characteristics between patients with and without persistent mutations at each time point.

From: Prognostic value of measurable residual disease monitoring by next-generation sequencing before and after allogeneic hematopoietic cell transplantation in acute myeloid leukemia

Variables

Pre-HSCT (n = 132)

Post-HSCT-1m (n = 114)

No persistent mutations (n = 75)

Persistent mutations (n = 57)

p-Value

No persistent mutations (n = 91)

Persistent mutations (n = 23)

p-Value

Cohort

  

0.029

  

0.147

 Cohort #1

42 (56)

21 (37)

 

40 (44)

14 (61)

 

 Cohort #2

33 (44)

36 (63)

 

51 (56)

9 (39)

 

Age at HSCT, years

  

0.029

  

0.341

 Median (range)

45 (19–74)

54 (19–70)

 

48 (19–74)

55 (21–69)

 

Age group, n (%)

  

0.589

  

0.217

 <60 years

62 (83)

45 (79)

 

72 (81)

16 (70)

 

 ≥60 years

13 (17)

12 (21)

 

17 (19)

7 (30)

 

Sex, n (%)

  

0.349

  

0.319

 Male

43 (57)

28 (49)

 

54 (59)

11 (48)

 

 Female

32 (43)

29 (51)

 

37 (41)

12 (52)

 

AML type, n (%)

  

0.365

  

0.364

 De novo

68 (91)

47 (93)

 

77 (85)

22 (96)

 

 Secondary

6 (8)

9 (16)

 

12 (13)

1 (4)

 

 Therapy-related

1 (1)

1 (2)

 

2 (2)

0

 

WBC count, at diagnosis

  

0.520

  

0.806

 Median (range)

11.3 (0.5–226.2)

13.2 (0.6–188.7)

 

11.6 (0.5–266.2)

15.4 (0.6–188.7)

 

WBC group, at diagnosis, n (%)

  

0.090

  

0.464

 <50 × 109/L

62 (83)

40 (70)

 

70 (77)

16 (70)

 

 ≥50 × 109/L

13 (17)

17 (30)

 

21 (23)

7 (30)

 

Cytogenetic risk group, n (%)a

  

0.147

  

0.408

 Favorable

16 (21)

5 (9)

 

14 (15)

5 (22)

 

 Intermediate

46 (53)

41 (72)

 

59 (65)

16 (70)

 

 Adverse

13 (17)

11 (19)

 

18 (20)

2 (8)

 

2017 ELN risk group, n (%)

  

0.705

  

0.524

 Favorable

28 (37)

19 (33)

 

31 (34)

10 (43)

 

 Intermediate

27 (36)

19 (33)

 

35 (38)

6 (26)

 

 Adverse

20 (27)

19 (33)

 

25 (28)

7 (30)

 

Disease status at HSCT, n (%)

  

0.315

  

0.025

 CR1

74 (99)

54 (95)

 

90 (99)

20 (87)

 

 CR2

1 (1)

3 (5)

 

1 (1)

3 (13)

 

Donor type, n (%)

  

0.189

  

0.943

 Matched sibling

12 (16)

15 (26)

 

17 (18)

4 (17)

 

 Matched unrelated

34 (45)

18 (32)

 

36 (40)

10 (44)

 

 Haploidentical

29 (39)

24 (42)

 

38 (42)

9 (39)

 

Relationship, n (%)

  

0.109

  

0.732

 Related

41 (55)

39 (68)

 

55 (60)

13 (57)

 

 Unrelated

34 (45)

18 (32)

 

36 (40)

10 (43)

 

Stem cell source, n (%)

  

0.633

  

-

 Peripheral blood

72 (96)

56 (98)

 

91 (100)

23 (100)

 

 Bone marrow

3 (4)

1 (2)

 

0

0

 

HLA disparity, n (%)

  

0.690

  

0.819

 Full matched

46 (61)

33 (58)

 

53 (58)

14 (61)

 

 Mismatch

29 (39)

24 (42)

 

38 (42)

9 (39)

 

Conditioning intensity, n (%)

  

0.281

  

0.119

 Myeloablative

36 (48)

22 (39)

 

40 (44)

6 (26)

 

 Reduced-toxicity

39 (52)

35 (61)

 

51 (56)

17 (74)

 

GVHD prophylaxis, n (%)

  

0.146

  

1.000

 Cyclosporine + MTX

12 (16)

15 (26)

 

17 (19)

4 (17)

 

 Tacrolimus + MTX

63 (84)

42 (74)

 

74 (81)

19 (83)

 

ATG, total dose, n (%)

  

0.587

  

0.184

 Not used

11 (15)

5 (9)

 

10 (11)

1 (4)

 

 2.5 mg/kg

29 (39)

24 (42)

 

33 (36)

13 (57)

 

 5.0 mg/kg

35 (47)

28 (49)

 

48 (53)

9 (39)

 

HCT-CI at HSCT, n (%)

  

0.911

  

0.394

 0–2

52 (69)

39 (68)

 

63 (69)

18 (78)

 

 >2

23 (31)

18 (32)

 

28 (31)

5 (22)

 

Sex match, n (%)

  

0.608

  

0.071

 Female to male

13 (17)

8 (14)

 

19 (21)

1 (4)

 

 Others

62 (83)

49 (86)

 

72 (79)

22 (96)

 
  1. AML acute myeloid leukemia, ATG anti-thymocyte globulin, CR1 first complete remission, CR2 second complete remission, ELN European LeukemiaNet, GVHD graft-versus-host disease, HCT-CI hematopoietic cell transplant-comorbidity index, HSCT hematopoietic stem cell transplantation, MTX methotrexate, n number, WBC white blood cells.
  2. aCytogenetic risk group was defined by refinement of cytogenetic classification by the United Kingdom Medical Research Council trials (Grimwade, et al.24).