Table 1.
Description of Study Participants.*
| Variable (units) | Statistic | All (n=47) |
Female (n=22) | Male (n=25) |
|---|---|---|---|---|
| BMI (kg/m2) | Mean [SD] min, max |
23.4 [2.3] 19.4, 28.7 |
23.5 [2.6] 19.7, 28.7 |
23.3 [2.0] 19.4, 26.0 |
| Age (years) | Mean [SD] min, max |
27.4 [3.6] 20.5, 36.1 |
27.5 [3.4] 22.8, 34.0 |
27.4 [3.9] 20.5, 36.1 |
| Number of sessions conducted* | Total sessions | 269 | 129 | 140 |
| Participants with data for all six treatments* | Percent | 81 | 86 | 76 |
| Baseline FVC (liters) | Mean† [SD] min, max |
4.9 [1.1] 3.1, 8.1 |
4.2 [0.5] 3.1, 5.4 |
5.5 [1.0] 4.0, 8.1 |
| Baseline FEV1 (liters) | Mean† [SD] min, max |
3.9 [0.8] 2.9, 6.1 |
3.4 [0.4] 2.9, 4.4 |
4.3 [0.7] 3.3, 6.1 |
| Baseline FEV1/FVC (ratio) | Mean† [SD] min, max |
0.8 [0.1] 0.6, 1.0 |
0.8 [0.1] 0.7, 1.0 |
0.8 [0.1] 0.6, 0.9 |
| Baseline FEF25–75 (liters/s) | Mean† [SD] min, max |
3.9 [1.1] 2.2, 6.3 |
3.5 [0.9] 2.2, 5.4 |
4.2 [1.1] 2.2, 6.3 |
*
A participant session was counted if they had data for baseline measurement and at least one post-exposure measurement.
†
Mean of each individuals’ average baseline health measurement across their completed study sessions. Participants were required to have normal spirometry at a pre-study screening exam (results not included here), defined as spirometry values greater than 70% of the predicted value for the age/gender.
Definition of abbreviations: BMI = body mass index; FVC = forced vital capacity; FEV1 = forced expiratory volume in 1 second; FEF25–75 = mid-expiratory flow rate (average rate at 25th-75th percent of the pulmonary volume); SD = standard deviation