Table 2 Compliance and feasibility metrics
| Â | Metric | Compliance |
|---|---|---|
Participant Compliance | wristband: returned all wristbands at end of study | 99% |
| Â | wristband: compliance and quality metrics followed | 90% |
Spiro: 3 readings/day | 93% | |
Spiro: All recorded readings done in triplicate | 100% | |
ELF Tracker: Answered 3 questionnaires/day | 94% | |
ELF Tracker: Answered evening questionnaire | 91% | |
Log: Filled out each day | 99% | |
Phone: Carried on person all day | 95% | |
Wristband sensitivity | PAHs detected at measureable levels each day | Table S2 |
| Â | Variable chemical concentrations detected between days and between participants | See Fig. 2 |
Data transfer | Study ID included with all transmitted data | 90% |
| Â | All data received was accurately time-stamped | 100% |
No data gaps (i.e. participant indicated readings taken but PNNL received no data) | 95% | |
Location data received | 95% | |
Spirometry data received | 95% | |
Questionnaire data received | 95% | |
Data Accuracy | Spirometer: Values met American Thoracic Society guidelines for quality data: - FEV1/FVC ratio below 1.00 - In triplicate readings, the two largest FEV1 values are within a reading are within 0.150 L of each other - In triplicate readings, the two largest FVC values are within 0.150 L of each other | 94% |
|  | Spirometer: Portable spirometer is sensitive enough to detect variations in lung function within-day and within the study period. | See Fig. 6 |
Spirometer: Maintains calibration during study duration (Within 2.5% of known volume) | 100% |