Effects of a Smartphone-Based Breastfeeding Coparenting Intervention Program on Breastfeeding-Related Outcomes in Couples During First Pregnancy: Randomized Controlled Trial
Authors: Huang Yi-Yan , Wang Rong , Huang Wei-Peng , Wu Tian , Wang Shi-Yun , R. Redding Sharon , Ouyang Yan-Qiong 
Published: December 2024

Background
A low breastfeeding rate causes an increased health care burden and negative health outcomes for individuals and society. Coparenting is an essential tactic for encouraging breastfeeding when raising a child. The efficacy of the coparenting interventions in enhancing breastfeeding-related outcomes is controversial.

Objective
This study aimed to examine the effects of coparenting interventions on exclusive breastfeeding rates, exclusive breastfeeding duration, breastfeeding knowledge, parenting sense of competence, coparenting relationships, depressive symptoms in new couples at 1 and 6 months post partum, and the BMI of infants 42 days post partum.

Methods
This was a randomized, single-blinded controlled clinical trial. Eligible couples in late pregnancy in a hospital in central China were randomly assigned to 2 groups. While couples in the control group received general care, couples in the intervention group had access to parenting classes, a fathers’ support group, and individual counseling. Data were collected at baseline (T0), 1 month post partum (T1), and 6 months post partum (T2). Data on exclusive breastfeeding rate and exclusive breastfeeding duration were analyzed using the chi-square, Fisher exact, or Mann-Whitney U tests; coparenting relationships and the infant’s BMI were analyzed using an independent samples t test; and breastfeeding knowledge, parenting sense of competence, and depressive symptoms were analyzed using a generalized estimation equation.

Results
A total of 96 couples were recruited, and 79 couples completed the study. The intervention group exhibited significantly higher exclusive breastfeeding rates at T1 (90% vs 65%, P=.02) and T2 (43.6% vs 22.5%, P=.02), compared with the control group. Exclusive breastfeeding duration was extended in the intervention group than in the control group at T1 (30, range 30-30 days vs 30, range 26.5-30 days; P=.01) and T2 (108, range 60-180 days vs 89, range 28-149.3 days; P<.05). The intervention group exhibited greater improvements in maternal breastfeeding knowledge (β=.07, 95% CI 0.006-0.13; P=.03) and maternal parenting sense of competence (β=5.49, 95% CI 2.09-8.87; P<.01) at T1, enhanced coparenting relationships at T1 (P<.001) and T2 (P=.02), paternal breastfeeding knowledge at T2 (β=.25, 95% CI 0.15-0.35, P<.001), paternal parenting sense of competence at T1 (β=5.35, 95% CI 2.23-8.47, P<.01), and reduced paternal depressive symptoms at T2 (β=.25, 95% CI 0.15-0.35, P<.001), and there was a rise in infants’ BMI at 42 days post partum (β=.33, 95% CI 0.01-0.64, P=.04).

Conclusions
An evidence-based breastfeeding coparenting intervention is effective in improving exclusive breastfeeding rate, prolonging exclusive breastfeeding duration within the initial 6 months post partum, enhancing parental breastfeeding knowledge, levels of parenting sense of competence and coparenting relationship, infant’s BMI, and reducing paternal depressive symptoms.

Trial Registration
Chinese Clinical Trial Registry ChiCTR2300069648; https://tinyurl.com/2p8st2p8