Auscultation of crackles at the initial clinic visit according to patient and clinician characteristics (n=290)
| None | Fine crackles | Coarse crackles | Both | P value | |
| IPF, n (%) | |||||
| Obese (BMI (≥30 Kg/m2) | 1 (1.6%) | 49 (79.0%) | 3 (4.8%) | 9 (14.6%) | 0.788 |
| Non-obese (BMI<30 Kg/m2) | 1 (1.5%) | 48 (71.6%) | 4 (6.0%) | 14 (20.9%) | |
| Non-IPF, n (%) | |||||
| Obese (BMI (≥30 Kg/m2) | 11 (14.6%) | 48 (64.0%) | 8 (10.7%) | 8 (10.7%) | 0.878 |
| Non-obese (BMI<30 Kg/m2) | 14 (16.3%) | 50 (58.1%) | 10 (11.6%) | 12 (14.0%) | |
| IPF, n (%) | |||||
| Emphysema on CT | 1 (2.6%) | 30 (78.9%) | 4 (10.6%) | 3 (7.9%) | 0.100 |
| No emphysema on CT | 1 (1.1%) | 67 (73.6%) | 3 (3.3%) | 20 (22.0%) | |
| Non-IPF, n (%) | |||||
| Emphysema on CT | 7 (17.0%) | 27 (65.9%) | 3 (7.3%) | 4 (9.8%) | 0.696 |
| No emphysema on CT | 18 (15.0%) | 71 (59.2%) | 15 (12.5%) | 16 (13.3%) | |
| IPF, n (%) | |||||
| With COPD | 1 (7.1%) | 10 (71.5%) | 1 (7.1%) | 2 (14.3%) | 0.547 |
| Without COPD | 1 (0.9%) | 87 (75.7%) | 6 (5.2 %) | 21 (18.2%) | |
| Non-IPF, n (%) | |||||
| With COPD | 3 (20.0%) | 7 (46.7%) | 3 (20.0%) | 2 (13.3%) | 0.625 |
| Without COPD | 22 (15.1%) | 91 (62.3%) | 15 (10.3%) | 18 (12.3%) | |
| IPF, n (%) | |||||
| Resident(n=10)* | 0 (0%) | 11 (84.6%) | 2 (15.4%) | 0 (0%) | 0.109 |
| ILD fellow (n=4)* | 0 (0%) | 44 (75.9%) | 2 (3.4%) | 12 (20.7%) | |
| Staff respirologist (n=1) | 2 (3.4%) | 42 (72.4%) | 3 (5.2%) | 11 (19.0%) | |
| Non-IPF, n (%) | |||||
| Resident (n=16)* | 2 (8.7%) | 14 (60.9%) | 4 (17.4%) | 3 (13.0%) | 0.755 |
| ILD fellow (n=4)* | 15 (20.0%) | 44 (58.6%) | 8 (10.7%) | 8 (10.7%) | |
| Staff respirologist (n=1) | 8 (12.7%) | 40 (63.5%) | 6 (9.5%) | 9 (14.3%) |
*Resident includes respirology fellows, internal medicine residents and other residents rotating in respirology.
BMI, body mass index; COPD, chronic obstructive pulmonary disease; ILD, interstitial lung disease; IPF, idiopathic pulmonary fibrosis.