Table 3.
Pulmonary function and thoracic volume after traditional growing rod procedures
| Preoperatively | At last follow-up | p-value a | |
|---|---|---|---|
| Mean predicted FEV1, % (range) | 50 (20 to 86) | 53 (15 to 80) | 0.08 |
| Mean predicted FVC, % (range) | 51 (24 to 81) | 55 (25 to 89) | 0.06 |
| SAL ratio (range) | 0.78 (0.60 to 0.94) | 0.85 (0.62 to 0.99) | 0.03 |
| T1 to T12 height, mm (range) | 142.4 (103.2 to 201.8) | 186.1 (152.7 to 248.5) | N/A b |
| FEV1, litre (range) | 0.92 (0.44 to 1.65) | 1.15 (.49 to 1.85) | N/A b |
| FVC, litre (range) | 1.04 (0.45 to 1.74) | 1.31 (0.55 to 1.98) | N/A b |
a
statistics were performed with paired sample t-test
b
not applicable for comparison due to naturally increase with growth
FEV1, forced expiratory volume in one second; FVC, expiratory forced vital capacity; SAL: space available for lung; N/A, not applicable