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Table 2 Risk of glioma and years of use of farm pesticide by type and target 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  
Type and Target 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)
Insecticide use 196 1.20 (3.30) 361 1.26 (2.93) 0.97 (0.92, 1.03) 109 0.96 (2.23) 353 1.27 (2.96) 0.97 (0.89, 1.05)
Animals 77 2.55 (4.69) 166 2.30 (3.83) 0.97 (0.92, 1.03) 44 1.94 (2.90) 163 2.31 (3.86) 0.97 (0.89, 1.06)
Crops 64 0.45 (1.16) 140 0.58 (2.02) 0.88 (0.68, 1.13) 38 0.43 (1.37) 136 0.59 (2.05) 0.94 (0.71, 1.25)
Buildings/Lots 46 1.92 (4.64) 122 1.49 (3.13) 0.97 (0.89, 1.06) 28 1.07 (2.24) 118 1.50 (3.18) 0.94 (0.79, 1.11)
Herbicide use 160 0.26 (0.74) 265 0.41 (0.98) 0.78 (0.59, 1.01) 90 0.25 (0.68) 260 0.42 (0.99) 0.81 (0.58, 1.14)
Fungicide use 29 0.12 (0.28) 45 0.15 (0.38) 0.81 (0.21, 3.17) 19 0.16 (0.33) 45 0.15 (0.38) 1.41 (0.36, 5.56)
  1. aNumbers of participants reported any use of farm pesticide, and if applicable, on a target. 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 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 pesticide/target category 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.