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Table 4 Beliefs about the causes of breast cancer by case status, Cape Cod, Massachusetts, 1988-1995

From: Self-reported chemicals exposure, beliefs about disease causation, and risk of breast cancer in the Cape Cod Breast Cancer and Environment Study: a case-control study

   Cases Controls  
How much does ... contribute to breast cancer? No. % No. %  
Heredity A lot 331 42 474 66 **
  A little 295 37 163 23  
  Not at all 99 13 36 5  
  Don't know 62 8 48 7  
Diet A lot 217 28 205 28  
  A little 327 42 294 41  
  Not at all 160 20 125 17  
  Don't know 83 11 97 13  
Chemicals and pollutants in the air or water A lot 476 60 412 57 *
  A little 188 24 203 28  
  Not at all 53 7 31 4  
  Don't know 70 9 75 10  
Women's reproductive or breast feeding history A lot 67 9 70 10  
  A little 262 33 261 36  
  Not at all 245 31 225 31  
  Don't know 213 27 165 23  
  1. Percentages may not add to 100% because of rounding. Two-sided P value calculated using chi square test; * indicates P < 0.05 and ** indicates P < 0.001.