Table 2.
Meta-analysis results of prediction of postoperative FEV1: Mean difference.
| Prediction technique | Studies | Mean difference (measured − predicted FEV1) | 95% Confidence interval | I2 |
|---|---|---|---|---|
| CT — volume & density | 3 (n = 109) | 71 ml | 38 to 103 | 0% |
| Perfusion scintigraphy | 7 (n = 194) | 101 ml | − 11 to 214 | 88% |
| SPECT–CT | 2 (n = 59) | 107 ml | − 10 to 225 | 66% |
| CT — perfusion | 2 (n = 65) | 143 ml | 59 to 228 | 0% |
| Segment counting | 4 (n = 145) | 192 ml | 88 to 295 | 74% |
| Subsegment counting | 3 (n = 82) | 233 ml | 135 to 332 | 65% |
| SPECT | 1 (n = 30) | 10 ml | − 114 to 134 | Single study |
| CT — ventilation | 1 (n = 30) | 70 ml | − 24 to 164 | Single study |
| CT — volumetry | 1 (n = 30) | 90 ml | − 21 to 201 | Single study |
| CT — volume & partial density | 1 (n = 23) | 266 ml | 172 to 360 | Single study |
| Ventilation scintigraphy | 1 (n = 23) | 312 ml | 188 to 435 | Single study |