Objetivo: Determinar la validez y la consistencia interna del instrumento Vínculo entre padres e hijos neonatos versión en español resultado de la adaptación transcultural del Maternal Attachment Inventory (MAI) de Mary Müller.Materiales y método: Estudio descriptivo metodológico – psicométrico, cuya validez facial y de contenido se logró con la participación de un panel de expertos y 385 potenciales padres con bajo nivel de escolaridad. Para la validez de constructo y consistencia interna la muestra fue de 352 padres de recién nacidos a término.Resultados: La validez facial para la población general mostró una comprensión global y por ítems superior a 90 %, y un índice de aceptabilidad superior en las tres categorías valoradas; igualmente el índice de Kapa y Fleiss mostró concordancia interjueces para cada uno de los ítems por encima de 0.69. La validez de contenido global presenta fuerte pertinencia y relevancia con un índice de Kapa y Fleiss de 0.71 y 0.77 respectivamente. En la validez de constructo el análisis factorial exploratorio arrojó cuatro factores con una varianza total explicada por el índice de Kaiser-Meyer-Olkin (KMO) de 73 %, y la consistencia interna por el Alfa de Cronbach fue de 0.7 para el total de la escala.Conclusiones: El instrumento Vínculo entre padres e hijos neonatos es válido y confiable para medir el vínculo afectivo en el contexto colombiano cuyo uso favorece la práctica de enfermería basada en evidencia en contextos diversos como Unidades de Cuidado Neonatal y en la práctica ambulatoria. Objective: To determine the validity and internal consistency of the instrument Attachment between parents and newborn children, spanish version as a result from the transcultural adaptation of the Maternal Attachment Inventory (MAI) by Mary Muller.Materials and method: Methodological – psychometric descriptive study, whose facial and content validity was achieved with the participation of a panel of experts and 385 potential parents with low level of schooling. For the validity of construct and internal consistency the sample was 352 parents of full-term newborns.Results: Facial validity for the general population showed a global and item understanding of more than 90%, and a higher acceptability rate in the three categories valued; likewise, the Kapa and Fleiss index showed inter-concordance for each of the items above 0.69. The validity of global content has a strong pertinence and relevance with a Kapa and Fleiss index of 0.71 and 0.77 respectively. In the validity of the construct, the exploratory factor analysis yielded four factors with a total variance explained by the Kaiser-Meyer-Olkin Index (KMO) of 73%, and the internal consistency by Cronbach's Alpha was 0.7 for the total of the scale.Conclusions: The Attachment between parents and newborn children instrument is valid and reliable to measure the affective attachment in the Colombian context whose use favors the practice of evidence-based nursing in diverse contexts such as Neonatal Care Units and in ambulatory practice.
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