Development, psychometric assessment, and predictive validity of the comprehensive breastfeeding knowledge scale

Abstract

AimTo develop a breastfeeding knowledge scale that aligns with the Baby Friendly Hospital Initiative and psychometrically test it among expectant parents. BackgroundAlthough breastfeeding is recommended by all leading health authorities, rates remain suboptimal with women often not achieving their breastfeeding goals. One factor found to positively influence infant feeding behaviours is increased maternal breastfeeding knowledge. However, little research has been conducted validating the dimensions of breastfeeding knowledge to guide interventions to promote positive breastfeeding outcomes. DesignFollowing an extensive literature review, the 28-item Comprehensive Breastfeeding Knowledge Scale (CBKS) was developed and psychometrically tested. MethodA sample of 217 Canadian expectant parents (113 women and 104 coparents) was recruited and administered the CBKS with follow-up questionnaires at 4 and 12 weeks postpartum. Psychometric analyses included exploratory factor analysis, internal consistency, concurrent validity, and predictive validity. ResultsExploratory factor analysis resulted in three dimensions: (1) managing milk supply; (2) persisting through challenges; and (3) correcting misconceptions. Coefficient alpha for the total scale was 0.83 and support for concurrent validity was demonstrated through significant positive correlations with the Iowa Infant Feeding Attitude scale. Further, higher total and subscale scores in pregnancy were associated with exclusive breastfeeding at 4 and 12 weeks postpartum, providing good evidence for predictive validity. ConclusionPreliminary data suggest the CBKS is a valid and reliable measure of breastfeeding knowledge. Upon further testing, this self-report measure may be used to (1) identify women with low breastfeeding knowledge requiring targeted support, (2) individualize health professional care with breastfeeding women, and (3) evaluate the effectiveness of breastfeeding interventions and programs.