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

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Boxes with dashed borders contain brief guidance text for completing the entries for new variables.

Scope

This includes a verbal definition of the spatial, temporal, and other limits
(system boundaries) of the variable. The scope is defined according to the use
purpose of the assessment(s) that the variable belongs to.

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

Description of the data used for obtaining the value of the variable
(e.g. measurement data; mathematical method and its parameters).
Please include references (preferably using the <ref></ref> tags)
and links to original data, as appropriate.

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 PM2.5
    • change of 577 MRADs (95% Cl 468, 686) per 10 µg/m3 PM2.5 per year per 1000 adults
      • Assumes a background rate of 7.8 MRADs per person per year

Causality

List of upstream variables.
The variables can be listed used descriptive (free-format) names or unambiguous identifiers
(e.g. Analytica IDs).

Unit

Unit in which the result is expressed.

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

Formula

Algebra or other explicit methods if possible
(e.g. Analytica code between the ''<anacode></anacode>'' delimiters).

Result

If possible, a numerical expression or distribution.
Age group MRADs 95% Cl
15-64 577 468, 686

See also

Links to relevant information that does not belong to Definition.

References

Will appear here automatically, if cited above using the <ref></ref> tags.
Additional references can also be listed here.
  1. Ostro BD & Rothschild (1989). Air pollution and acute respiratory morbidity: an observational study of multiple pollutants. Environ Res, 50: 238-247.