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Table 1 Cases, ratesa, and population at risk from six Midwestern states included in crop analysis, 2004–2008, excluding counties with populations >300,000

From: Agricultural crop density and risk of childhood cancer in the midwestern United States: an ecologic study

    Total Leukemia ALL AML CNS/PNS CNS PNS
  Number of counties At-risk populationb Cases Rate Cases Rate Cases Rate Cases Rate Cases Rate Cases Rate
Illinois 96 286,387 108 37.7 88 30.7 13 4.5 90 31.4 51 17.8 39 13.6
Indianac 89 304,230 127 41.7 106 34.8 12 3.9 158 51.9 - - - -
Iowa 98 162,469 62 38.2 51 31.4 10 6.2 59 36.3 39 24.0 20 12.3
Michigan 77 282,812 117 41.4 88 31.1 18 6.4 135 47.7 78 27.6 57 20.2
Missouri 111 228,951 98 42.8 71 31.0 20 8.7 94 41.1 48 21.0 46 20.1
Ohio 80 374,800 152 40.6 114 30.4 21 5.6 155 41.4 99 26.4 56 14.9
Total 551 1,639,649 664 40.5 518 31.6 94 5.7 691 42.1 315a 19.2 218a 13.3
  1. aCrude rates per 100,000 children. bAverage annual population at risk, children 0–4 years of age. cSeparate CNS and PNS counts were not provided for Indiana. - Cases and rates not available