Table 2. Distribution of body height, predicted body weight, tidal volume, and estimated tidal volume.
| Total (n = 28) | <175 cm (n = 14) | ≥175 cm (n = 14) | p | |
|---|---|---|---|---|
| Body height (cm) | 172.6 ± 9.4 | 165.2 ± 6.8 | 180.0 ±4.3 | 0.004 |
| Estimated body height (cm) | 177.0 ± 7.5 | 171.7 ± 6.8 | 182.4 ±3.2 | |
| Mean difference (cm) | 4.8 ± 4.7 | 7.2 ± 4.8 | 2.3 ± 3.1 | |
| Mean difference (%) | 2.7 | 4.4 | 1.2 | |
| Predicted body weight (kg) | 67.9 ± 9.3 | 60.6 ± 7.3 | 75.2 ± 3.9 | 0.002 |
| Estimated (kg) | 73.9 ± 7.5 | 68.9 ± 7.7 | 78.9 ± 2.6 | |
| Mean difference (kg) | 6.0 ± 4.1 | 8.3 ± 4.1 | 3.7 ± 2.7 | |
| Mean difference (%) | 8.8 | 13.6 | 4.9 | |
| Tidal volume (ml) | 407 ± 57.0 | 362 ± 43.3 | 452 ± 24.5 | 0.002 |
| Estimated tidal volume (ml) | 441 ± 46.7 | 409 ± 45.9 | 473 ± 16.0 | |
| Mean difference (ml) | 34 ± 23.6 | 47 ± 23.9 | 21 ± 15.3 | |
| Mean difference (%) | 8.3 | 12.9 | 4.6 | |
| Exposed tidal volume (ml/kg/PBW) | 6.5 ± 0.4 | 6.8 ± 0.4 | 6.3 ± 0.2 | 0.001 |
Measured vs. estimated values are presented for all included subjects (n = 28) and after dichotomous classification (threshold <175 cm). For easier interpretation, differences between visual estimates and measured magnitudes are expressed as absolute values (cm, kg, ml) and percentage of measured values. p-values refer to the mean difference of absolute values.