Results of Chartis assessment: duration of measurement and expiratory volume during measurement
| Total | CV negative | CV positive | p-value | |
| Subjects n | 249 | 187 | 62 | |
| Duration of Chartis assessment | ||||
| Total time, s | 240 (77–864) | 226 (77–864) | 304 (122–533) | 0.021 |
| Time to VT20=6 mL, s | 168 (36–546) | |||
| Difference, s | 60 (5–354) | |||
| Expiratory volume during Chartis assessment | ||||
| Expiratory volume, mL | 320 (15–1780) | 240 (15–983) | 1014 (115–1780) | p<0.005 |
| Expiratory volume at VT20=6 mL, mL | 235 (11–991) | |||
| Difference, mL | 5 (0–120) | |||
Values are presented as median (range) unless otherwise indicated. CV: collateral ventilation; VT20: “volume trend for the previous 20 s”.