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Table 1 Demographic and clinical characteristics of participants
| Study participants | Non-participants | p value | |
|---|---|---|---|
| Number | 67 | 20 | |
| Age mean (range) | 24.1 (18–30) | 22.6 (18–30) | 0.09 |
| Females, n (%) | 38 (59) | 8 (40) | 0.20 |
| BMI (kg m2), mean (SD) | 21.8 (3.6) | 21.2 (2.2) | 0.40 |
| FEV1 % predicted, mean (SD) | 72.2 (23) | 74 (22) | 0.80 |
| FEV1 (≤40 %), n (%) | 7 (11) | 1 (5) | |
| FEV1 (41–70 %), n (%) | 25 (38) | 7 (35) | |
| FEV1 (>71 %), n (%) | 33 (51) | 12 (60) | 0.70 |
| Chronic pulmonary infectiona, n (%) | 40 (62) | 10 (50) | 0.30 |
| CFRD, n (%) | 18 (28) | 7 (35) | 0.40 |
| Singleb, n (%) | 33 (49) | NA | |
| Lower education, n (%) | 21 (31) | NA | |
| High school, n (%) | 18 (27) | NA | |
| College/university, n (%) | 19 (28) | NA | |
| Employed or studying, n (%) | 56 (84) | NA | |
| Incapacitated to work/study, n (%) | 9 (13) | NA |
