TABLE 3.
ADULT STUDY POPULATION IN 1992, CLINICAL TRIAL PARTICIPANTS COMPARED WITH NONPARTICIPANTS
| Adult
|
|||
|---|---|---|---|
| Characteristic | Trial Participants | Trial Nonparticipants | p |
| n | 1,048 | 1,879 | |
| Age, mean (± SD) | 26.4 (6.9) | 25.8 (6.8) | 0.02 |
| Sex, n (% female) | 469 (44.5) | 836 (44.8) | 0.89 |
| Nonwhite, n (%) | 15 (1.4) | 56 (3.0) | 0.01 |
| Commercial health insurance, n (%) | 613 (58.6) | 1,002 (53.4) | 0.01 |
| Mean height percentile (SD) | 21.6% (21.2) | 24.1% (23.0) | 0.003 |
| Median weight percentile (interquartile range) | 12.0% (5,32) | 15.0% (5,36) | 0.01 |
| FEV1, L, mean (± SD) | 1.98 (0.88) | 2.24 (0.97) | < 0.001 |
| FEV1% predicted, mean (± SD) | 54.8% (22.3) | 62.0% (24.8) | < 0.001 |
| FVC, L, mean (± SD) | 3.10 (1.05) | 3.34 (1.12) | < 0.001 |
| FVC % predicted, mean (± SD) | 73.4% (20.7) | 78.9% (22.2) | < 0.001 |
| Median annual outpatient visits in 1992 (interquartile range) | 5 (3–12) | 3 (2–5) | < 0.001 |
Total population: n = 2,927. Characteristics were assessed at cohort entry for both groups.