Relative rates of rejection (D or F grade) and mean differences# in rejected values according to reviewers and computerised assessment for healthy subjects and Caucasian adults
| Entire dataset | FVC | FEV1 | ||
| Rejected | ΔFVC¶ mL | Rejected | ΔFEV1¶ mL | |
| Healthy subjects+ | ||||
| Reviewer 1 | 5.2 | −351 (−402– −300) | 3.1 | −312 (−372– −251) |
| Computer 25 mL | 16.0 | −154 (−181– −128) | 3.9 | −110 (−165– −55) |
| Caucasian adults§ | ||||
| Reviewer 1 | 3.7 | −428 (−591– −265) | 2.1 | −212 (−383.4– −40.2) |
| Reviewer 2 | 3.8 | −167 (−331– −4) | 1.9 | −92 (266.7–83.6) |
| Reviewer 3 | 5.9 | −97 (−233–39) | 2.0 | −40 (−266.7–83.6) |
| Computer 25 mL | 11.5 | −104 (−191– −16) | 3.1 | −12 (−191.3– −16.1) |
Data are presented as % or mean (95% CI). FVC: forced vital capacity; FEV1: forced expiratory volume in 1 s. #: calculated as the mean difference from predicted values observed for tests rejected according to the various types of analysis; ¶: FVC was rejected by the computer (grades D and F) based on the 2005 American Thoracic Society/European Respiratory Society recommendations (i.e. end-of-test did not attain <25 mL for ≥1 s in subjects aged >10 years, if exhalation was <6 s); +: n=7777; §: n=1466.