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Table 1 Number of subjects by proxy/non-proxy, PCE-exposed/unexposed, and case/control status.

From: Impact of tetrachloroethylene-contaminated drinking water on the risk of breast cancer: Using a dose model to assess exposure in a case-control study

  Non-Proxy Subjects Proxy Subjects Total Subjects
PCE-exposed 189 102 291
   Cases 101 54 155
   Controls 88 48 136
Unexposed 696 301 997
   Cases 360 157 517
   Controls 336 144 480
Total 885 403 1288
   Cases 461 211 672
   Controls 424 192 616