Table 3.

Adjusted analysis with sequentially expanding models.^⁎

Outcome	Stage 1: including only selected COVID-19 variables	Stage 2: including only selected environment variables	Stage 3: including only selected weather variables	Stage 4: including only selected variables from stages 2 and 3	Stage 5: including only selected variables from stages 1 and 4
STEMI per day	Emergency: p>0.05 Lockdown: p=0.009 Cases: p>0.05 Deaths: p=0.017 Tests: p>0.05	NO2 (mean): p=0.026 NOX (mean): p>0.05 O3 (min): p>0.05	–	–	Deaths: p<0.001 NO2 (mean): p=0.430
STEMI requiring PCI per day	Emergency: p>0.05 Lockdown: p=0.045 Cases: p>0.05 Deaths: p>0.05 Tests: p<0.001	NO2 (mean): p=0.037 NOX (mean): p>0.05 O3 (min): p>0.05	–	–	Tests: p<0.001 NO2 (mean): p>0.05
NSTEMI per day	Emergency: p>0.05 Lockdown: p<0.001 Cases: p<0.001 Deaths: p>0.05 Tests: p>0.05	Benzene (min): p>0.05 NO (min): p>0.05 NO2 (mean): p<0.001 NOX (min): p>0.05 O3 (min): p>0.05 SO2 (min): p>0.05 PM10: p<0.001	Temperature (mean): p<0.001	NO2 (mean): p<0.001 PM10 (mean): p>0.05 Temperature (mean): p>0.05	Cases: p<0.001 NO2 (mean): p<0.001
NSTEMI requiring PCI per day	Emergency: p>0.05 Lockdown: p=0.012 Cases: p<0.001 Deaths: p>0.05 Tests: p>0.05	Benzene (min): p>0.05 NO (min): p>0.05 NO2 (min): p=0.036 NOX (min): p>0.05 O3 (min): p=0.013	Temperature (mean): p=0.002	NO2 (mean): p<0.001 O3 (min): p>0.05 Temperature (mean): p>0.05	Cases: p<0.001 NO2 (mean): p<0.001

min=minimum; COVID-19=coronavirus disease 2019; NO=nitric oxide; NOX=nitrogen oxides; NO2=nitric dioxide; O3=ozone; PM10=particulate matter <10 μm; NSTEMI=non-ST-elevation myocardial infarction; PM=particulate matter; SO2=sulfur dioxide; STEMI=ST-elevation myocardial infarction.

^⁎Reported as p values