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Table 2 Compliance and feasibility metrics

From: Development of an environmental health tool linking chemical exposures, physical location and lung function

  Metric Compliance
Participant Compliance wristband: returned all wristbands at end of study 99%
  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
  Variable chemical concentrations detected between days and between participants See Fig. 2
Data transfer Study ID included with all transmitted data 90%
  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
  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%