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

Table 2 Cytogenetic comparisons of 18 dry-cleaning workers exposed to tetrachloroethylene and 18 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)

* Probability of a positive relationship between exposure and level of aberrations (one-tailed test).

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