From: Parental and infant characteristics and childhood leukemia in Minnesota
 | Sub-cohort | ALL | AML | ||||
---|---|---|---|---|---|---|---|
 | No. (%) | No. (%) | HR | 95% CI | No. (%) | HR | 95% CI |
Maternal age (continuous/5 year increase) | 8750 | 559 | 1.05 | 0.97–1.14 | 87 | 1.21 | 1.00–1.47 |
   missing | 0 | 1 |  |  | 0 |  |  |
Maternal Race | Â | Â | Â | Â | Â | Â | Â |
   black | 324 (4) | 9 (2) | 0.41 | 0.21–0.79 | 4 (5) | 1.20 | 0.43–3.33 |
   other/unknown | 519 (6) | 30 (5) | 0.87 | 0.60–1.28 | 6 (7) | 1.16 | 0.50–2.68 |
   white | 7907 (90) | 520 (93) | ref. | 77 (89) | ref. | ||
   missing | 0 (0) | 1 (0) |  |  | 0 (0) |  |  |
Maternal birthplace | Â | Â | Â | Â | Â | Â | Â |
   U.S. or U.S. territory | 8226 (94) | 532 (95) | ref. | 76 (87) | ref. | ||
   foreign born | 516 (6) | 26 (5) | 0.76 | 0.51–1.15 | 11 (13) | 2.18 | 1.14–4.18 |
   missing | 8 (0) | 2 (0) |  |  | 0 (0) |  |  |
Maternal Education | Â | Â | Â | Â | Â | Â | Â |
   high school | 3173 (38) | 179 (34) | ref. | 29 (36) | ref. | ||
   <high school | 902 (11) | 49 (9) | 0.96 | 0.69–1.33 | 8 (10) | 0.97 | 0.44–2.14 |
   >high school | 4209 (51) | 301 (57) | 1.21 | 1.00–1.47 | 44 (54) | 1.13 | 0.70–1.81 |
   missing | 466 (5) | 31 (6) |  |  | 6 (7) |  |  |
Marital status | Â | Â | Â | Â | Â | Â | Â |
   married | 6988 (80) | 459 (82) | ref. | 75 (86) | ref. | ||
   not married | 1754 (20) | 100 (18) | 0.84 | 0.67–1.05 | 12 (14) | 0.61 | 0.33–1.13 |
   missing | 8 (0) | 1 (0) |  |  | 0 (0) |  |  |