Table 2.
Mean values for CT-acquired measurements for the complete cohort and for participants with and without a fracture
| Variable | All participants (mean ± SD) | Participants with fracture (n=95) | Participants without fracture (n=998) | P-value |
|---|---|---|---|---|
| Pi10 (mm) | 2.4±0.5 | 2.5±0.5 | 2.4±0.5 | 0.43 |
| Perc15 (HU) | −907.6±19.1 | −908.9±22.0 | −907.5±18.8 | 0.02 |
| E/I-ratioMLD | 83.7±6.2 | 84.8±5.6 | 83.6±6.2 | 0.43 |
| TI | 0.7±0.1 | 0.7±0.1 | 0.7±0.1 | 0.24 |
Abbreviations: CT, computed tomography; E/I-ratioMLD, expiration to inspiration ratio of mean lung density; HU, Hounsfield Unit; Perc15, emphysema score as 15th percentile of attenuation distribution curve on inspiratory scan; Pi10, airway wall thickness at an internal perimeter of 10 mm; SD, standard deviation; TI, tracheal index.