Descriptive lung function parameters in preschoolers aged 4.5 years (n=967)
| Area of study | ||||
|---|---|---|---|---|
| Sabadell n=495 | Gipuzkoa n=472 | |||
| Spirometry | ||||
| No | 62 (12.5) | 88 (18.6) | ||
| Yes | 433 (87.5) | 384 (81.4) | ||
| Children with at least 1 acceptable manoeuvre | 332 (67.1) | 288 (61.0) | ||
| Number of acceptable manoeuvres | ||||
| 1 | 69 (20.8) | 51 (17.7) | ||
| 2 | 84 (25.3) | 60 (20.8) | ||
| 3 | 118 (35.5) | 108 (37.5) | ||
| 4 | 15 (4.5) | 40 (13.9) | ||
| 5 | 19 (5.7) | 16 (5.6) | ||
| 6 | 12 (3.6) | 7 (2.4) | ||
| 7 | 9 (2.7) | 5 (1.7) | ||
| 8 | 6 (1.7) | 1 (0.3) | ||
| Reproducible testing* | 204 (47.2) | 174 (45.2) | ||
| Summary of measures (mean±SD) | N | Sabadell | N | Gipuzkoa |
| FVC (mL) | 332 | 1000.0 (217.7) | 288 | 1000.6 (184.9) |
| Predicted FVC (mL) | 329 | 1076.9 (114.9) | 277 | 1080.0 (101.4) |
| Predicted FVC (%) | 329 | 93.2 (18.2) | 277 | 92.6 (15.3) |
| FEV1 (mL) | 332 | 922.0 (188.5) | 288 | 927.3 (167.2) |
| Predicted FEV1 (mL) | 329 | 1003.4 (96.4) | 277 | 1006.6 (86.4) |
| Predicted FEV1 (%) | 329 | 92.1 (16.7) | 277 | 92.1 (15.0) |
| FEV1/FVC ratio (as %) | 332 | 92.7 (7.3) | 288 | 92.9 (5.8) |
| Predicted FEV1/FVC ratio (as %) | 329 | 93.3 (0.01) | 277 | 93.7 (0.8) |
| PEF (mL/s) | 332 | 2000.8 (493.9) | 288 | 1972.7 (471.9) |
| FEF25–75 (mL/s) | 332 | 1271.9 (372.1) | 288 | 1325.9 (360.6) |
| Predicted FEF25–75 (mL/s) | 329 | 1482.8 (94.6) | 277 | 1485.9 (89.3) |
| Predicted FEF25–75 (%) | 329 | 86.0 (25.1) | 277 | 89.7 (24.1) |
*FVC and FEV1 agreeing within 100 mL between the best two blows.
PEF, peak expiratory flow; FVC, forced vital capacity