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Table 1 Distribution of controls and cases by sociodemographic variables and selected risk factors

From: Non-alcoholic beverages and risk of bladder cancer in Uruguay

   Cases Controls OR 95% CI
Variable Category Number % Number %   
Age (years) 30–39 2 0.8 4 0.8 NA  
  40–49 14 5.5 28 5.6   
  50–59 37 14.5 74 14.8   
  60–69 91 35.7 182 36.3   
  70–79 86 33.7 175 34.9   
  80–89 25 9.8 38 7.6   
Sex Males 225 88.2 441 88.0 NA  
  Females 30 11.8 60 12.0   
Residence Montevideo 116 45.5 254 50.7 NA  
  Other counties 139 54.5 247 49.3   
Urban/rural status Urban 192 75.3 416 83.0 1.00  
  Rural 63 24.7 85 17.0 1.31 0.80–2.14
Education (years) 0–2 57 22.3 140 27.9 1.00  
  3–5 106 41.6 175 34.9 1.42 0.93–2.17
  6+ 92 36.1 186 37.2 1.24 0.79–1.95
Income (US dollars per month) <=142 93 36.5 225 44.9 1.00  
  143+ 113 44.3 194 38.7 1.51 1.05–2.17
  Missing 49 19.2 82 16.4 1.50 0.94–2.40
Family history of bladder cancer No 244 95.7 495 98.8 1.00  
  Yes 11 4.3 6 1.2 4.97 1.73–14.27
Body Mass Index <=22.8 59 23.1 127 25.3 1.00  
  22.9–25.1 65 25.5 126 25.1 1.13 0.72–1.79
  25.2–27.1 53 20.8 120 23.9 0.92 0.57–1.49
  27.2+ 78 30.6 128 25.7 1.33 0.84–2.10
Occupation Low risk 175 68.6 385 76.9 1.00  
  High risk 80 31.4 116 23.1 1.41 0.92–2.15
Years of smoking Never smokers 48 18.8 136 27.1 1.0 Reference
  1–29 32 12.5 60 12.0 1.55 0.85–2.82
  30–39 31 12.2 70 14.0 1.34 0.73–2.46
  40–49 54 21.2 109 21.8 1.61 0.94–2.74
  50+ 90 35.3 126 25.1 2.39 1.46–3.90
N patients   255 100.0 501 100.0   
  1. NA, not applicable (matching variable)
  2. OR, odds ratio adjusted for age, sex, residence, urban/rural status, education, family history of bladder cancer among first-degree relatives, body mass index, occupation, smoking status, years since quit, number of cigarettes smoked per day, maté drinking, coffee drinking, tea drinking, soft drinks and milk intake
  3. CI, confidence interval