Table 1 Characteristics of subjects who did and did not complete the SF-36
|  | SF-36 available (n = 1012) | SF-36 not available (n = 34) | p-value |
|---|---|---|---|
Gender (female), n (%) | 520 (51.4%) | 21 (61.8%) | 0.233 |
Age years, mean (sd) | 43.96 (9.8) | 47.11 (10.4) | 0.047 |
BMI kg/m2, mean (sd) | 24.8 (4.3) | 24.5(4.2) | 0.488 |
Education (low), n (%) | 209 (20.7%) | 14 (41.2%) | 0.004 |
Smoking habits, n(%) | 0.094 | ||
 never smokers | 500 (49.5%) | 12 (35.3%) | |
 past smokers | 277 (27.4%) | 15 (44.1%) | |
 current smokers | 233 (23.7%) | 8 (22.2%) | |
Non-resp. comorbidities, n (%) | 336 (33.3%) | 9 (26.5%) | 0.403 |
Cardiac comorbidities, n (%) | 148 (14.7%) | 5 (14.7%) | 0.997 |
Phenotypesa, n (%) | 0.448 | ||
 controls | 328 (32.4%) | 15 (44.1%) | |
 NAR | 95 (9.4%) | 6 (17.6%) | |
 AR | 163 (16.1%) | 5 (14.7%) | |
 CB | 48 (4.7%) | 1 (2.9%) | |
 PA | 126 (12.4%) | 1 (2.9%) | |
 CA | 224 (22.1%) | 5 (14.7%) | |
 COPD | 28 (2.8%) | 1 (2.9%) | |