Exam Results by Modality and Presence or Absence of Asthma
| Group | Negative | P | Nondiagnostic | P | Positive | P |
| VQ | ||||||
| Asthma (n = 2,926) | 2,667 (91.1%) | 0.005 | 97 (3.3%) | 0.223 | 162 (5.5%) | 0.010 |
| Nonasthma (n = 8,672) | 7,746 (89.3%) | 330 (3.8%) | 596 (6.9%) | |||
| CTPA | ||||||
| Asthma (n = 1,589) | 1,373 (86.4%) | <0.001 | 25 (1.6%) | 0.891 | 191 (12.0%) | <0.001 |
| Nonasthma (n = 6,225) | 5,118 (82.2%) | 95 (1.5%) | 1,012 (16.3%) |