The mortality due to PM 2.5 from buses

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Scope

Number of premature deaths due to PM 2.5 from buses in Helsinki Metropolitan Area in 2020 R↻

Definition

Data

• mortality due to cardiopulmonary, lung cancer and other causes,
• exposure to road traffic PM 2.5,
• the fraction of bus exposure of total road traffic exposure

Causality

• effect of bus type on PM 2.5 emissions and exposure,D↷
• relationship between the exposure of PM 2.5 and mortality effects

Unit

Estimated deaths per year associated with primary PM 2.5

Formula

deltaM = Mb(eexp(bdeltaE)-1)

• b = dose-response coefficient
• deltaE = change in exposure
• Mb = background mortalityR↻

Results

Scenario	Current 1997
Endpoint	Cardiopulmonary	Lung ca	All others
Mean	10	1.4	0.1
SD	9.3	1.3	1.6
0.01	0	-1.3	-5.4
0.025	0	-0.6	-1.9
0.05	0	-0.1	0
0.25	0	0.7	0
0.5 (Median)	9	1.3	0
0.75	15.6	2	0
0.95	27.3	3.9	0.7
0.975	31.3	4.6	3.5
0.99	36.1	5.8	6.4

Scenario	Year 2020
Endpoint	Cardiopulmonary	Lung ca	All others
Mean	13.1	1.9	0.1
SD	23.1	3.5	3
0.01	0	-1.3	-4.6
0.025	0	-0.5	-1.3
0.05	0	0	0
0.25	0	0.3	0
0.5 (Median)	5.6	0.9	0
0.75	15.4	2.2	0
0.95	51.4	7.4	0.5
0.975	76.7	10.5	2.7
0.99	114.2	16.2	8

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