Table 4.
Estimation of gestational age using newborn anthropometric parameters in four hospitals of North Shewa Zone, Oromia Region, Ethiopia (n = 420).
| Parameters | r | r 2 | Adjusted r2 | SEE | Regression equations GA (weeks) | Sig. |
|---|---|---|---|---|---|---|
| Head circumference | 0.483 | 0.233 | 0.232 | 1.79 | 16.55 + [0.689*HC(cm)] | 0.0001 |
| Mid-upper arm circumference | 0.481 | 0.231 | 0.230 | 1.79 | 27.78 + [1.04*MUAC(cm)] | 0.0001 |
| Foot Length | 0.457 | 0.209 | 0.207 | 1.82 | 23.84 + [1.88*FL(cm)] | 0.0001 |
| Chest circumference | 0.482 | 0.232 | 0.230 | 1.79 | 20.32 + [0.574*CHC(cm)] | 0.0001 |
| HC,MUAC,FL and CHC | 0.639 | 0.409 | 0.404 | 1.58 | 9.78 + [0.209*CHC(cm)] + [0.607*MUAC(cm)] + 0.727*FL(cm) + [0.322*HC(cm)] | 0.0001 |
r, Pearson's correlation coefficient; HC, head circumference; cm, centimeter; GA, gestational age; MUAC, mid-upper arm circumference; FL, foot length; CHC, chest circumference; MAE, mean absolute error; Sig, level of significance (P < 0.05).