Table 2: Statistical correlation between the in vivo versus in vitro data at various postexposure times.

Between the backbone valuesBetween the fold change of genes expression
Comparison groupPearson correlationSpearman correlationPearson CorrelationSpearman Correlation

Bronchial
In vivo versus 4 h after exposure in vitro 0.730.770.250.13
In vivo versus 24 h after exposure in vitro 0.810.830.370.29
In vivo versus 48 h after exposure in vitro 0.770.800.350.30

Nasal
In vivo versus 4 h after exposure in vitro 0.570.760.350.27
In vivo versus 24 h after exposure in vitro 0.710.740.310.09
In vivo versus 48 h after exposure in vitro 0.650.730.260.14

P values < 0.05 for all comparisons.