ERF for short term PM2.5 exposure and minor restricted activity days (MRADs)

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Moderator:Virpi Kollanus (see all)

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Scope

Exposure-response function for short-term (acute) exposure to ambient air particulate matter (PM) with an aerodynamic diameter < 2.5 µm and minor restricted activity days (MRADs). MRAD is defined as a day when a person needs to make minor restrictions to his/her normal daily activities because of ill-health. Minor refers to restrictions less severe than having to stay in bed or stay out work.

Dimensions and boundaries relevant for the variable

Age of exposed population
Country/other geographic area

Definition

Data

Ostro & Rothschild (1989)^[1]

Minor restricted activity days (MRADs) among adults aged 18-64:

0.74% (95% Cl 0.60%, 0.88%) increase in MRADs per 1 µg/m³ PM_2.5
change of 577 MRADs (95% Cl 468, 686) per 10 µg/m³ PM_2.5 per year per 1000 adults
- Assumes a background rate of 7.8 MRADs per person per year

Causality

Unit

Increase in no. of MRADs per 10 µg/m3 increase in exposure per 1000 people aged 18-64

Formula

Result

Age group	MRADs	95% Cl
15-64	577	468, 686

References

↑ Ostro BD & Rothschild (1989). Air pollution and acute respiratory morbidity: an observational study of multiple pollutants. Environ Res, 50: 238-247.

[1] Ostro BD & Rothschild (1989). Air pollution and acute respiratory morbidity: an observational study of multiple pollutants. Environ Res, 50: 238-247.

[1]