Table 3. Event-free survival of children with ALL exposed to residential ELF–MF.
| ⩽0.1 μT |
0.1 μT—0.2 μT |
0.2 μT—0.3 μT |
>0.3 μT |
|||||||
|---|---|---|---|---|---|---|---|---|---|---|
| N (Events) | N (Events) | HR | 95% CI | N (Events) | HR | 95% CI | N (Events) | HR | 95% CI | |
| Main | 712 | 54 | 1.10 | 0.82–1.46 | 16 | 1.14 | 0.69–1.89 | 13 | 0.76 | 0.44–1.33 |
| US POG study not included | 659 | 40 | 1.03 | 0.74–1.44 | 14 | 1.18 | 0.69–2.02 | 9 | 0.60 | 0.31–1.17 |
| T-cell ALL | 79 | 10 | 1.69 | 0.82–3.48 | 0 | 0.00 | — | 1 | 0.56 | 0.07–4.38 |
| B-precursor ALL | 452 | 43 | 1.14 | 0.83–1.58 | 15 | 1.44 | 0.85–2.43 | 11 | 0.93 | 0.51–1.70 |
| Other ALL | 181 | 1 | 0.15 | 0.02–1.07 | 1 | 0.43 | 0.06–3.16 | 1 | 0.42 | 0.06–3.12 |
Abbreviations: ALL, acute lymphoblastic leukemia; CI, confidence interval; HR, hazard ratio; POG Pediatric Oncology Group.