Table 1.
Summary statistics and MAE/MAPE for different age groups
| Internal validation set | External validation set | ||||
|---|---|---|---|---|---|
| Age group (Y) | Male | Female | Male | Female | |
| 0–1 | MAE (m) | 1.30 ± 1.46 | 1.26 ± 1.27 | 1.33 ± 1.39 | 1.32 ± 1.34 |
| MAPE (%) | NA* | NA* | NA* | NA* | |
| 1–3 | MAE (m) | 3.35 ± 2.81 | 3.34 ± 2.96 | 3.68 ± 3.41 | 3.48 ± 3.08 |
| MAPE (%) | 14.4 ± 12.7 | 14.5 ± 13.0 | 15.8 ± 14.8 | 15.0 ± 13.3 | |
| 3–6 | MAE (m) | 4.97 ± 4.02 | 4.63 ± 3.67 | 6.45 ± 5.13 | 5.78 ± 4.63 |
| MAPE (%) | 9.6 ± 7.8 | 9.1 ± 7.4 | 13.0 ± 9.8 | 11.2 ± 9.1 | |
| 6–10 | MAE (m) | 6.97 ± 5.29 | 7.28 ± 5.47 | 8.46 ± 6.81 | 8.90 ± 6.65 |
| MAPE (%) | 7.0 ± 5.4 | 7.3 ± 5.5 | 8.6 ± 7.0 | 9.2 ± 7.0 | |
| 10–16 | MAE (m) | 9.63 ± 7.21 | 10.11 ± 7.33 | 10.32 ± 7.54 | 10.67 ± 7.62 |
| MAPE (%) | 6.3 ± 4.7 | 6.5 ± 4.8 | 6.7 ± 4.9 | 7.0 ± 5.0 | |
| Overall | MAE (m) | 5.86 ± 5.39 | 5.80 ± 5.41 | 7.40 ± 6.56 | 7.29 ± 6.40 |
| MAPE (%) | NA* | NA* | NA* | NA* | |
| AEQs | 4.31 (1.74, 8.48) | 4.26 (1.70, 8.32) | 5.41 (2.26, 10.77) | 5.45 (2.10, 10.61) | |
| APEQs | 7.18 (3.24, 13.22) | 7.27 (3.35, 13.22) | 8.13 (3.68, 16.65) | 8.11 (3.77, 14.65) | |
Values are presented as mean ± standard deviation or median (25th percentile, 75th percentile)
MAE mean absolute error, MAPE mean absolute percentage error, Y years, m months, AEQs absolute error quartiles, APEQs absolute percentage error quartiles
MAPE is not available for the ‘0–1 year’ and ‘overall’ groups because the presence of 0-month cases in these groups results in division by zero in MAPE calculation.