Concordance between total CT score and lung function results in children with CF
| Normal CT | Abnormal CT | Total | % Concordant (95%CI) | |
| Normal LCI | 4 | 5 | 9 | 81 (68 to 91) |
| Abnormal LCI | 5 | 39 | 44 | |
| Total | 9 | 44 | 53 | |
| Normal FEV1 | 9 | 30 | 39 | 47 (34 to 61) |
| Abnormal FEV1 | 0 | 18 | 18 | |
| Total | 9 | 48 | 57 | |
| Normal FVC | 9 | 38 | 47 | 33 (21 to 47) |
| Abnormal FVC | 0 | 10 | 10 | |
| Total | 9 | 48 | 57 | |
| Normal FEF25-75 | 7 | 25 | 32 | 53 (39 to 66) |
| Abnormal FEF25-75 | 2 | 23 | 25 | |
| Total | 9 | 48 | 57 | |
| Normal FRC | 5 | 22 | 27 | 51 (36 to 66) |
| Abnormal FRC | 0 | 18 | 18 | |
| Total | 5 | 40 | 45 | |
| Normal RV | 5 | 20 | 25 | 54 (38 to 69) |
| Abnormal RV | 0 | 18 | 18 | |
| Total | 5 | 38 | 43 | |
| Normal TLC | 5 | 31 | 36 | 31 (18 to 47) |
| Abnormal TLC | 0 | 9 | 9 | |
| Total | 5 | 40 | 45 | |
| Normal sReff | 8 | 31 | 39 | 44 (31 to 58) |
| Abnormal sReff | 1 | 17 | 18 | |
| Total | 9 | 48 | 57 |
Nb As indicated in the cumulative total for each test, technically satisfactory results were not obtained from all children for all tests. FRCmbw only detected abnormalities in one child with CF (figure E4 OLS).