Baseline patient characteristics and therapeutic parameters of the 269 randomized patients receiving intermediate-dose methotrexate (ID-MTX) or high-dose methotrexate (HD-MTX)
| . | Total . | ID-MTX . | HD-MTX . | P . | |||
|---|---|---|---|---|---|---|---|
| No. . | % . | No. . | % . | No. . | % . | ||
| Total | 269 | (100) | 141 | (52) | 128* | (48) | |
| Clinical parameters | |||||||
| Sex | .611 | ||||||
| Male | 174 | 65 | 89 | 63 | 85 | 66 | |
| Female | 95 | 35 | 52 | 37 | 43 | 34 | |
| Age at relapse | .610 | ||||||
| Younger than 5 y | 26 | 10 | 13 | 9 | 13 | 10 | |
| 5 y or older and younger than 10 y | 143 | 53 | 79 | 56 | 64 | 50 | |
| 10 y and older | 100 | 37 | 49 | 35 | 51 | 40 | |
| Time point of relapse† | .313 | ||||||
| Very early | 10 | 4 | 7 | 5 | 3 | 2 | |
| Early | 112 | 42 | 62 | 44 | 50 | 39 | |
| Late | 147 | 55 | 72 | 51 | 75 | 59 | |
| Site | .587 | ||||||
| Bone marrow isolated | 156 | 58 | 85 | 60 | 71 | 56 | |
| BM combined | 68 | 25 | 32 | 23 | 36 | 28 | .156 |
| Plus CNS | 35 | 52 | 21 | 66 | 14 | 39 | |
| Plus testis | 26 | 38 | 9 | 28 | 17 | 47 | |
| Plus CNS/testis | 2 | 3 | 0 | 0 | 2 | 6 | |
| Plus CNS/other | 1 | 2 | 0 | 0 | 1 | 3 | |
| Plus other | 4 | 6 | 2 | 6 | 2 | 6 | |
| Isolated extramedullary | 45 | 17 | 24 | 17 | 21 | 16 | .538 |
| CNS | 18 | 40 | 9 | 38 | 9 | 43 | |
| Testis | 25 | 56 | 14 | 58 | 11 | 52 | |
| CNS/testis | 1 | 2 | 1 | 4 | 0 | 0 | |
| Other | 1 | 2 | 0 | 0 | 1 | 5 | |
| Peripheral blast cell count | .673 | ||||||
| Less than 1/μL | 93 | 35 | 49 | 35 | 44 | 35 | |
| 1 to less than 10 000/μL | 142 | 53 | 72 | 41 | 70 | 55 | |
| 10 000/μL or more | 32 | 12 | 19 | 15 | 13 | 10 | |
| No data | 2 | (.7) | 1 | (.7) | 1 | (.8) | |
| BCR/ABL fusion transcript | .746 | ||||||
| Positive | 11 | 9 | 6 | 8 | 5 | 11 | |
| Negative | 115 | 91 | 73 | 92 | 42 | 89 | |
| No data | 143 | (53) | 62 | (44) | 81 | (63) | |
| Immunophenotype‡ | .082 | ||||||
| Pro-B | 12 | 5 | 10 | 7 | 2 | 2 | |
| Common ALL | 191 | 73 | 95 | 69 | 96 | 77 | |
| Pre-B | 58 | 22 | 33 | 24 | 25 | 20 | |
| Biphenotypic | 1 | .4 | 0 | 0 | 1 | .8 | |
| No data | 7 | (3) | 3 | (2) | 4 | (3) | |
| Treatment | |||||||
| Frontline protocol | .887 | ||||||
| ALL-BFM | 179 | 67 | 98 | 70 | 81 | 63 | |
| COALL | 31 | 12 | 16 | 12 | 15 | 12 | |
| Other | 59 | 22 | 27 | 19 | 32 | 25 | |
| Irradiation at relapse | .792 | ||||||
| None | 88 | 33 | 47 | 34 | 41 | 32 | |
| Cranial | 94 | 36 | 45 | 33 | 49 | 38 | |
| Craniospinal | 37 | 14 | 21 | 15 | 16 | 13 | |
| TBI | 46 | 17 | 24 | 18 | 22 | 17 | |
| No data | 4 | (2) | 4 | (3) | 0 | 0 | |
| Stem-cell transplantation in CR2 | |||||||
| None | 214 | 80 | 110 | 78 | 104 | 81 | .426 |
| Matched family donor | 32 | 12 | 17 | 12 | 15 | 12 | |
| Unrelated donor | 9 | 3 | 7 | 5 | 2 | 2 | |
| Mismatched family donor | 4 | 2 | 1 | 1 | 3 | 2 | |
| Autologous | 10 | 4 | 6 | 4 | 4 | 3 | |
| . | Total . | ID-MTX . | HD-MTX . | P . | |||
|---|---|---|---|---|---|---|---|
| No. . | % . | No. . | % . | No. . | % . | ||
| Total | 269 | (100) | 141 | (52) | 128* | (48) | |
| Clinical parameters | |||||||
| Sex | .611 | ||||||
| Male | 174 | 65 | 89 | 63 | 85 | 66 | |
| Female | 95 | 35 | 52 | 37 | 43 | 34 | |
| Age at relapse | .610 | ||||||
| Younger than 5 y | 26 | 10 | 13 | 9 | 13 | 10 | |
| 5 y or older and younger than 10 y | 143 | 53 | 79 | 56 | 64 | 50 | |
| 10 y and older | 100 | 37 | 49 | 35 | 51 | 40 | |
| Time point of relapse† | .313 | ||||||
| Very early | 10 | 4 | 7 | 5 | 3 | 2 | |
| Early | 112 | 42 | 62 | 44 | 50 | 39 | |
| Late | 147 | 55 | 72 | 51 | 75 | 59 | |
| Site | .587 | ||||||
| Bone marrow isolated | 156 | 58 | 85 | 60 | 71 | 56 | |
| BM combined | 68 | 25 | 32 | 23 | 36 | 28 | .156 |
| Plus CNS | 35 | 52 | 21 | 66 | 14 | 39 | |
| Plus testis | 26 | 38 | 9 | 28 | 17 | 47 | |
| Plus CNS/testis | 2 | 3 | 0 | 0 | 2 | 6 | |
| Plus CNS/other | 1 | 2 | 0 | 0 | 1 | 3 | |
| Plus other | 4 | 6 | 2 | 6 | 2 | 6 | |
| Isolated extramedullary | 45 | 17 | 24 | 17 | 21 | 16 | .538 |
| CNS | 18 | 40 | 9 | 38 | 9 | 43 | |
| Testis | 25 | 56 | 14 | 58 | 11 | 52 | |
| CNS/testis | 1 | 2 | 1 | 4 | 0 | 0 | |
| Other | 1 | 2 | 0 | 0 | 1 | 5 | |
| Peripheral blast cell count | .673 | ||||||
| Less than 1/μL | 93 | 35 | 49 | 35 | 44 | 35 | |
| 1 to less than 10 000/μL | 142 | 53 | 72 | 41 | 70 | 55 | |
| 10 000/μL or more | 32 | 12 | 19 | 15 | 13 | 10 | |
| No data | 2 | (.7) | 1 | (.7) | 1 | (.8) | |
| BCR/ABL fusion transcript | .746 | ||||||
| Positive | 11 | 9 | 6 | 8 | 5 | 11 | |
| Negative | 115 | 91 | 73 | 92 | 42 | 89 | |
| No data | 143 | (53) | 62 | (44) | 81 | (63) | |
| Immunophenotype‡ | .082 | ||||||
| Pro-B | 12 | 5 | 10 | 7 | 2 | 2 | |
| Common ALL | 191 | 73 | 95 | 69 | 96 | 77 | |
| Pre-B | 58 | 22 | 33 | 24 | 25 | 20 | |
| Biphenotypic | 1 | .4 | 0 | 0 | 1 | .8 | |
| No data | 7 | (3) | 3 | (2) | 4 | (3) | |
| Treatment | |||||||
| Frontline protocol | .887 | ||||||
| ALL-BFM | 179 | 67 | 98 | 70 | 81 | 63 | |
| COALL | 31 | 12 | 16 | 12 | 15 | 12 | |
| Other | 59 | 22 | 27 | 19 | 32 | 25 | |
| Irradiation at relapse | .792 | ||||||
| None | 88 | 33 | 47 | 34 | 41 | 32 | |
| Cranial | 94 | 36 | 45 | 33 | 49 | 38 | |
| Craniospinal | 37 | 14 | 21 | 15 | 16 | 13 | |
| TBI | 46 | 17 | 24 | 18 | 22 | 17 | |
| No data | 4 | (2) | 4 | (3) | 0 | 0 | |
| Stem-cell transplantation in CR2 | |||||||
| None | 214 | 80 | 110 | 78 | 104 | 81 | .426 |
| Matched family donor | 32 | 12 | 17 | 12 | 15 | 12 | |
| Unrelated donor | 9 | 3 | 7 | 5 | 2 | 2 | |
| Mismatched family donor | 4 | 2 | 1 | 1 | 3 | 2 | |
| Autologous | 10 | 4 | 6 | 4 | 4 | 3 | |
Missing values are not included in the calculation of percentages and P values.
BM indicates bone marrow; BFM, Berlin-Frankfurt-Münster Study Group; CNS, central nervous system; COALL, Cooperative ALL Study Group; CR2, second complete remission; and TBI, total body irradiation.
Four patients randomized to treat with HD-MTX received ID-MTX due to parental decision.
Very early indicates within 18 month after primary diagnosis; early, after 18 months after primary diagnosis and within 6 months after elective cessation of frontline therapy; and late, later than 6 months after elective cessation of therapy.
Immunophenotype classified according to EGIL.33