RENDIMIENTO DIAGNÓSTICO DEL PONDERADO FETAL ECOGRÁFICO PARA LA DETECCIÓN DE MACROSOMÍA FETAL EN GESTANTES A TÉRMINO ATENDIDAS EN UN HOSPITAL DE TRUJILLO, PERÚ
Introduction. Fetal macrosomia requires ultrasound tools that guide obstetric decision-making in term pregnancies. Objectives. To determine the diagnostic performance of estimated fetal weight for detecting fetal macrosomia at birth. Methods. A diagnostic test study was conducted at Hospital Belén d...
| Autores: | , |
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| Formato: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2026 |
| País: | Perú |
| Recursos: | Instituto Nacional Materno Perinatal |
| Repositorio: | Revista Peruana de Investigación Materno Perinatal |
| Idioma: | español inglés |
| OAI Identifier: | oai:investigacionmaternoperinatal.inmp.gob.pe:article/527 |
| Acesso em linha: | https://investigacionmaternoperinatal.inmp.gob.pe/index.php/rpinmp/article/view/527 |
| Access Level: | acceso abierto |
| Palavra-chave: | Macrosomía fetal ultrasonografía prenatal peso fetal sensibilidad y especificidad edad gestacional Fetal macrosomia ultrasonography, prenatal fetal weight sensitivity and specificity gestational age |
| Resumo: | Introduction. Fetal macrosomia requires ultrasound tools that guide obstetric decision-making in term pregnancies. Objectives. To determine the diagnostic performance of estimated fetal weight for detecting fetal macrosomia at birth. Methods. A diagnostic test study was conducted at Hospital Belén de Trujillo during 2024–2025. The sample included 168 pregnant women with obstetric ultrasound from 37 weeks onward and neonatal birth weight records. Cases of fetal macrosomia and a similar number of pregnant women without fetal macrosomia from the same period were selected. Estimated fetal weight (EFW), calculated in g using Hadlock III, was compared with birth weight≥4000 g. The analysis considered the thresholds≥4000 g and>4108 g, diagnostic indicators, OR, 95%CI, and ROC curve. Results. The median EFW was 4157 g in pregnant women with fetal macrosomia and 3988 g in those without fetal macrosomia. EFW≥4000 g was associated with fetal macrosomia (OR=2.76; 95%CI: 1.46-5.22; p=0.002), with sensitivity of 71.91%, specificity of 51.90%, LR+ of 1.49, and LR- of 0.54. The threshold>4108 g showed a stronger association with fetal macrosomia (OR=5.53; 95%CI: 2.78-11.00), with sensitivity of 58.43%, specificity of 79.75%, LR+ of 2.88, and LR- of 0.52. The ROC curve showed an area under the curve of 0.718. Conclusion. EFW showed moderate diagnostic performance; therefore, the exploratory threshold>4108 g increased specificity, although neither threshold allowed fetal macrosomia to be sufficiently confirmed or ruled out at the individual level. |
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