Table 4

Interrupted time-series analysis with ARIMA error model for mortality rate due to myocardial infarction, city of Sao Paulo, Brazil, January 2005 to December 2010

Input SeriesLag*EstimateSEp Value
Total hospital admission (n)00.00015.6e–06>0.001
Minimum air temperature (°C)0−0.09150.0189>0.001
COmax (ppm)†50.27610.08630.001
Preintervention trend00.00670.00370.070
Smoking ban law (I)‡0−0.88890.2018<0.001
Postintervention trend00.01960.01870.294
  • *Month.

  • †Maximum carbon monoxide level for each 8 hours.

  • ‡Smoking ban law (starting in August 2009). Step function intervention, 1 if t≥T; 0 otherwise.