Attachment and relationship-based interventions for families during neonatal intensive care hospitalization: a study protocol for a systematic review and meta-analysis.

backgroundAttachment in the parent-infant dyads is fundamental for growth and development of children born prematurely. However, the natural process of attachment is interrupted just after preterm birth, and emotional and physical detachment, limited social interaction, and a traumatic, technologically heavy environment in a neonatal intensive care unit (NICU) may result in impaired attachment or bonding. To our knowledge, few studies have evaluated the effectiveness of interventions aimed at enhancing attachment, bonding, and relationships between parents and their preterm infants during the infant's hospitalization in the NICU. This study aims to perform a comprehensive systematic review and a meta-analysis survey of the effects of attachment- and relationship-based interventions in the NICU.

methodA comprehensive literature review will be conducted in the following databases: MEDLINE, CINAHL, PubMed, EMBASE (OVID), Scopus, PsycINFO (OVID), Cochrane Database of Systematic Reviews, Cochrane Central Register of Controlled Trials (CENTRAL), and Web of Science. Selected studies will be published in English, in the last 20 years, from 1999 onwards. All studies of randomized controlled trials (e.g., parallel groups, cluster) will be included. We will consider studies evaluating attachment- and relationship-based interventions (e.g., skin-to-skin contact, parental involvement in infant care) versus a comparator (standard of care). The primary outcome will be maternal attachment. Secondary outcomes will include infants' growth and development, family health, and parenting experience. Data extraction from eligible studies will be conducted independently by two experts who will compare their data. The Cochrane risk of bias tool will be applied to the selected studies. If data permits, we will conduct random effects meta-analysis where appropriate. Subgroup and additional analyses will be conducted to explore the potential sources of heterogeneity considering gender of parents, infants' sex, and gestational age. Data synthesis will be carried out using the RevMan 5.3 software. Publication bias will be assessed with the graphical funnel plot method and the Egger test. The quality of the evidence will be rated using the methods of the Grades of Recommendation Assessment, Development and Evaluation (GRADE) Working Group. DISCUSSION: The results of this systematic review will discuss the types of attachment- or relationship-based interventions that are effective for facilitating family health outcomes and the babies' growth and development and will contribute to establishing new evidence in neonatal and family-centered care by providing scientific guidance for clinical practice and further research. SYSTEMATIC REVIEW REGISTRATION: PROSPERO CRD42019145834.