Table 2.
Characteristics of estimators of birth weights of 356 neonates in Mulago national referral hospital
| Formula | min | max | Under estim (n/%) | Over estimation (n/%) | **Mean ± SD |
|---|---|---|---|---|---|
| Hadlock 1 | 1642 | 4697 | 3358.9 ± 421.2 | ||
| Hadlock 2 | 1634 | 4650 | 3290.0 ± 417.9 | ||
| Hadlock 3 | 1714 | 4644 | 3243.2 ± 405.4 | ||
| Hadlock4 | 1675 | 4531 | 3242.3 ± 404.6 | ||
| Shepard | 1750 | 4789 | 3161.4 ± 464.6 | ||
| Hadlock1 diff | -861 g (under est) | 944 g (over est) | 96 (27.0) | 260 (73.0) | 175.3 ± 285.4 |
| Hadlock2 diff | -915 g (under est) | 960 g (over est) | 122 (34.3) | 234 (65.7) | 106.4 ± 276.5 |
| Hadlock3 diff | -910 g (under est) | 977 g (over est | 153 (43.0) | 203 (57.0) | 59.6 ± 281.0 |
| Hadlock4 diff | − 922 g (under est) | 976 g (over est) | 142 (42.7) | 204 (57.3) | 58 ± 274.2 |
| Shepard diff | − 1078 g (under est) | 1028 g (over est) | 188 (52.8) | 168 (47.2) | −22.3 ± 327.0 |
**mean other than median was chosen as summary statistics because of the normality of sonographic estimators (formulas)