Systems Approaches Evaluating the Perturbation of Xenobiotic Metabolism in Response to Cigarette Smoke Exposure in Nasal and Bronchial Tissues

Table 1

Statistical correlation between the bronchial versus nasal in vitro data.

	Between the backbone values		Between the fold change of genes expression
Comparison group	Pearson correlation	Spearman correlation	Pearson correlation	Spearman correlation
Bronchial in vitro versus nasal in vitro (4 h after exposure)	0.97	0.95	0.72	0.55
Bronchial in vitro versus nasal in vitro (24 h after exposure)	0.93	0.94	0.62	0.49
Bronchial in vitro versus nasal in vitro (48 h after exposure)	0.77	0.86	0.39	0.37

P values < 0.05 for all comparisons.