Table 1.
Summary of exposure metrics with abbreviations used throughout the article.
| Description | Abbreviation | Calculation/Source |
|---|---|---|
| 1. Measurement-based personal ambient- derived PM2.5 (Reference Approach) |
PM2.5-pers(m) | (Sulfur2.5-pers / Sulfur2.5-out) * PM2.5-out(m) |
| 2. Measured outdoor PM2.5 | PM2.5-out(m) | Measured |
| 3. Predicted outdoor PM2.5 | PM2.5-out(p) | Modeled |
| 4. Nearest monitor outdoor PM2.5 | PM2.5-out(nm) | Measured by regulatory agencies |
| 5. Measurement-based indoor ambient- derived PM2.5 |
PM2.5-in(m) | Finf(m) * PM2.5-out(m) |
| 6. Prediction-based indoor ambient-derived PM2.5 |
PM2.5-in(p) | Finf(p) * PM2.5-out(p) |
| 7. Measurement-based, individually weighted ambient-derived PM2.5 |
PM2.5-pers(m-alt) | PM2.5-out(m) * tout-TLD + Finf(m) * PM2.5-out(m) * tin-TLD |
| 8. Prediction-based, individually weighted ambient-derived PM2.5 |
PM2.5-pers(p) | PM2.5-out(p) * tout-MAQ + Finf(p) * PM2.5-out(p) * tin-MAQ |
Notes: pers: personal; out: outdoor; in: indoor; m: measured; p: predicted; nm: nearest monitor; t: time; TLD: time-location diary; MAQ: MESA Air Questionnaire; Finf(p): Measured Infiltration Efficiency, Sulfur2.5-in / Sulfur2.5-out; Finf(p): Modeled Infiltration Efficiency, described by Allen et al.(4)