Table 1 Parameters estimate of the controlled interrupted time series model. Taranto. Years 2009-2016. The interruption is assumed as starting on the 1st November 2012

β0 Baseline PM₁₀ concentrations in the control series

24.1

22.6

25.7

<.0001

β1 Pre-intervention slope of PM₁₀ concentrations in the control series

0.0

0.0

0.1

0.4575

β2 Post-intervention changes in level in the control series

-2.3

-4.9

0.3

0.0667

β3 Post-intervention slope in the control series

-0.1

-0.2

0.0

0.2004

β4 Baseline difference in PM₁₀ concentrations level between the two time-series

8.2

5.6

10.8

<0,0001

β5 Pre-intervention difference in slopes between the two time-series

0.1

-0.1

0.2

0.1863

β6 Post-intervention difference in PM₁₀ concentrations level between the two time-series

-6.1

-11.2

-1.0

0.0097

β7 Post-intervention difference in slopes between the two time-series

-0.1

-0.2

0.1

0.5768