Table 2. Mean PF4, CTAP-III, and PBP levels in benzene-exposed (n = 20) and unexposed subjects (n = 20).

Protein	Unexposed, mean (SD)	Exposed, mean (SD)	P*	Decrease, %
PF4, μg/ml	5.19 (2.64)	3.14 (1.49)	0.0014	39.5
CTAP-III (AI)	1.58 (0.46)	0.59 (0.28)	3 E-9	62.7
PBP (AI)	0.11 (0.08)	0.05 (0.03)	0.0067	54.5

AI, average intensity.

^*Wilcoxon exact test