Pearson's correlation coefficients between benzene and alkylbenzenes: personal exposure measurements and environmental concentrations
| Personal exposure (traffic police) | Personal exposure (office police) | Environmental concentrations3-150 | |
| Benzene vtoluene | 0.86 | 0.67 | 0.96 |
| Benzenev ethylbenzene | 0.74 | 0.55 | 0.73 |
| Benzene v m,p-xylene | 0.90 | 0.60 | 0.95 |
| Benzenev o-xylene | 0.90 | 0.59 | 0.90 |
↵3-150 Correlation coefficients between monthly average concentrations measured in Rome at four municipal monitoring stations during July 1998 to April 1999.20