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Table 2 Cytogenetic comparisons of 18 dry-cleaning workers exposed to tetrachloroethylene and 18 unexposed laundry workers.

From: Cytogenetic analysis of an exposed-referent study: perchloroethylene-exposed dry cleaners compared to unexposed laundry workers

Variable PCE exposed? Percent Confidence Interval Pooled t-test Pr > |t|*
% cells with translocations no 0.599 (0.329 - 0.870) -0.93 0.18
  yes 0.747 (0.546 - 0.948)   
% cells with insertions no 0.0073 (-0.008 - 0.0229) -1.18 0.12
  yes 0.0291 (-0.007 - 0.0648)   
% cells with color junctions no 0.621 (0.338 - 0.905) -1.13 0.13
  yes 0.811 (0.597 - 1.025)   
% cells with dicentrics no 0.0365 (0.0064 - 0.0667) -1.99 0.027
  yes 0.0873 (0.0426 - 0.132)   
% cells with acentric fragments no 0.161 (0.0641 - 0.258) -1.30 0.10
  yes 0.253 (0.140 - 0.367)   
  1. * Probability of a positive relationship between exposure and level of aberrations (one-tailed test).