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Table 1 Characteristics of all participants and farm pesticide applicators in the Upper Midwest Health Study

From: The upper midwest health study: a case–control study of pesticide applicators and risk of glioma

  All participants    Farm Pesticide Applicators
  Including proxy respondents Excluding proxy respondents Including proxy respondents Excluding proxy respondents
Characteristic Cases Controls Cases Controls Cases Controls Cases Controls
  (n = 798) (n = 1,175) (n = 438) (n = 1,141) (n = 228) (n = 417) (n = 125) (n = 408)
Agea Mean (S.D.) 51.8 (16.1) 54.6 (15.4) 45.4 (15.3) 54.2 (15.4) 54.2 (14.1) 57.3 (13.7) 49.6 (13.5) 57.0 (13.6)
Sex         
Male 457 (57 %) 648 (55 %) 242 (55 %) 625 (55 %) 137 (60 %) 268 (64 %) 75 (60 %) 263 (64 %)
Female 341 (43 %) 527 (45 %) 196 (45 %) 516 (45 %) 91 (40 %) 149 (36 %) 50 (40 %) 145 (36 %)
Race         
White 783 (98 %) 1,152 (98 %) 429 (98 %) 1,119 (98 %) 228 (100 %) 415 (99.5 %) 125 (100 %) 406 (99.5 %)
Non-White 15 (2 %) 23 (2 %) 9 (2 %) 22 (2 %) 0 (0 %) 2 (0.5 %) 0 (0 %) 2 (0.5 %)
State of Residence         
I owa 190 (24 %) 302 (26 %) 101 (23 %) 284 (25 %) 64 (28 %) 121 (29 %) 34 (27 %) 115 (28 %)
Michigan 246 (31 %) 298 (25 %) 133 (30 %) 292 (26 %) 42 (18 %) 75 (18 %) 23 (18 %) 74 (18 %)
Minnesota 163 (20 %) 257 (22 %) 96 (22 %) 252 (22 %) 51 (22 %) 101 (24 %) 29 (23 %) 100 (25 %)
Wisconsin 199 (25 %) 318 (27 %) 108 (25 %) 313 (27 %) 71 (31 %) 120 (29 %) 39 (31 %) 119 (29 %)
Educationb         
College Graduate 132 (17 %) 200 (17 %) 89 (20 %) 198 (17 %) 32 (14 %) 44 (11 %) 22 (18 %) 44 (11 %)
High School Graduate 523 (66 %) 768 (65 %) 303 (69 %) 752 (66 %) 130 (57 %) 272 (65 %) 82 (66 %) 267 (65 %)
<12 Years 143 (18 %) 207 (18 %) 46 (11 %) 191 (17 %) 66 (29 %) 101 (24 %) 21 (17 %) 97 (24 %)
  1. aAge on January 1, 1993. Eligibility requirement was age > 18 at time of diagnosis or control selection.
  2. bOne control with unknown education was assigned with ‘High School Graduate’.