Regression Results. Table 2 reports the results from the application
of the conventional OLS approach. The estimation of Eq. 1 with
four different dependent variables is reported: the overall mortality
rate, the cardiorespiratory mortality rate, the noncardiorespiratoryrelated
mortality rate, and life expectancy. The set of controls are
reported at the bottom of the table. The first three rows indicate
that a 100 μg/m3 increase in TSPs is associated with a statistically
significant 3% increase in the mortality rate that is entirely due to
an increase in cardiorespiratory causes of death. The column (2)
specification in the final row indicates that a 100 μg/m3 increase in
TSPs is associated with a loss in life expectancy of about 0.52 y
(95% CI: 0.07, 0.97).