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Table 4 Risk of glioma and years of use of farm pesticide by category among applicators and nonusers in the Upper Midwest Health Study

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

Pesticide Including proxy respondents   Excluding proxy respondents  
Category Cases (n = 798) Controls (n = 1,175)   Cases (n = 438) Controls (n = 1,141)  
  na Years of useb n Years of use ORc (95 % CI) n Years of use n Years of use OR (95 % CI)
Arsenicals 28 0.03 (0.06) 60 0.09 (0.19) 0.01 (0.00, 1.71) 17 0.03 (0.06) 57 0.09 (0.20) 0.07 (0.00, 14.2)
Benzoic Acid 53 0.09 (0.28) 89 0.11 (0.19) 0.62 (0.13, 2.93) 29 0.05 (0.08) 87 0.11 (0.19) 0.06 (0.00, 2.17)
Carbamates 55 0.14 (0.48) 96 0.10 (0.19) 1.21 (0.47, 3.12) 32 0.15 (0.57) 94 0.11 (0.19) 1.38 (0.48, 3.97)
Chloroacetanilides 71 0.11 (0.23) 112 0.13 (0.25) 0.59 (0.18, 1.92) 37 0.12 (0.24) 110 0.13 (0.25) 0.68 (0.17, 2.77)
Dinitroanilines 56 0.04 (0.09) 85 0.06 (0.11) 0.20 (0.01, 5.41) 28 0.05 (0.11) 83 0.06 (0.11) 0.30 (0.01, 15.0)
Organochlorines 110 0.46 (1.22) 217 0.69 (1.81) 0.86 (0.73, 1.01) 55 0.44 (1.15) 213 0.70 (1.83) 0.86 (0.69, 1.08)
Organophosphates 107 0.47 (1.49) 207 0.55 (1.86) 0.94 (0.80, 1.09) 62 0.25 (0.91) 203 0.56 (1.87) 0.82 (0.57, 1.17)
Phenoxys 92 0.10 (0.27) 172 0.19 (0.42) 0.37 (0.14, 0.93)* 55 0.09 (0.17) 170 0.19 (0.43) 0.42 (0.13, 1.44)
Triazines 103 0.12 (0.31) 183 0.19 (0.55) 0.54 (0.26, 1.14) 57 0.11 (0.23) 179 0.20 (0.55) 0.51 (0.18, 1.45)
  1. aNumbers of users of farm pesticide. All other study participants are nonusers.
  2. bMean (and standard deviation) of cumulative years of use. Cumulative years of use is calculated as reported years of use (adjusted for available year based on EPA record) times days/year (maximum truncated at 250 days/year) divided by 365.25 as the exposure variable. It is calculated for all uses in a class by an applicator then summed for the applicator.
  3. cOdds ratio (and 95 % confidence intervals) per cumulative year of use, adjusted for matching variables (10-year age group, sex) and for age, and education
  4. *p < 0.05.