Table 3.
Log odd ratio estimates and standard error for the association of gestational age with neonatal mortality and low birth weight using calibrated and uncalibrated fundal height and last menstrual period measurements.
| Association of gestational age with neonatal mortality [N = 29 (1.05%)] | Association of gestational age with low birth weight [low birth weightb, N = 145 (5.27%)] | |||||||
|---|---|---|---|---|---|---|---|---|
| GA assessment method | Continuous version | Categorized version (preterm vs. full term) | Continuous version | Categorized version (preterm vs. full term) | ||||
| Log OR (SE) | OR (95% CI) | Log OR (SE) | OR (95% CI) | Log OR (SE) | OR (95% CI) | Log OR (SE) | OR (95% CI) | |
| Fundal height | ||||||||
| Uncalibrated | −0.159 (0.050) | 0.853 (0.773;0.897) | 0.197 (0.204) | 1.218 (0.816;1.816) | −0.353 (0.029) | 0.703 (0.664;0.744) | 0.669 (0.088) | 1.952 (1.643;2.320) |
| Calibrated | −0.205 (0.090a) | 0.815 (0.683;0.891) | 0.217 (0.321a) | 1.242 (0.662;2.331) | −0.478 (0.041) | 0.620 (0.572;0.672) | 0.662 (0.102a) | 1.939 (1.587;2.368) |
| Last menstrual period | ||||||||
| Uncalibrated | −0.158 (0.040) | 0.854 (0.789;0.889) | 0.327 (0.204) | 1.387 (0.930;2.069) | −0.273 (0.022) | 0.761 (0.729;0.795) | 0.860 (0.089) | 2.363 (1.985;2.814) |
| Calibrated | −0.471 (0.097a) | 0.624 (0.516;0.688) | 0.580 (0.216a) | 1.786 (1.170;2.727) | −0.839 (0.049) | 0.432 (0.393;0.476) | 0.830 (0.121a) | 2.293 (1.809;2.907) |
a
Standard error for the calibrated estimate was calculated using the bootstrap method.
b
Low birth weight defined as a birth born with less than 2,500 grams.