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The impact of maternal negative affectivity and general self-efficacy on breastfeeding: the Norwegian Mother and Child Cohort Study.

Ystrom E, Niegel S, Klepp KI, Vollrath ME

Division of Mental Health, Norwegian Institute of Public Health, Oslo, Norway. eivind.ystrom@fhi.no

OBJECTIVE: To assess the degree to which mothers' prepartum personality traits predict breastfeeding status at 6 months postpartum. STUDY DESIGN: This prospective cohort study is part of the Norwegian Mother and Child Cohort Study, conducted at the Norwegian Institute of Public Health. A total of 27,753 mothers completed assessment of negative affectivity (NA) and general self-efficacy (GSE) at gestation weeks 17 and 30 and completed a questionnaire about infant feeding at 6 months postpartum. Feeding status was classified with a cutoff at 6 months in the categories of predominant breastfeeding, mixed breastfeeding, and bottle-feeding. RESULTS: After adjusting for maternal smoking, age, education, cesarean section, preterm birth, primiparity, and external daycare, NA increased the odds of mixed breastfeeding (odds ratio [OR], 1.16; 95% confidence interval [CI], 1.03 to 1.32) and bottle feeding (OR, 1.32; 95% CI, 1.14 to 1.53) compared with predominant breastfeeding. GSE decreased the odds of bottle feeding (OR, 0.90; 95% CI, 0.84 to 0.97) but not of mixed breastfeeding (OR, 0.98; 95% CI, 0.92 to 1.04) compared with predominant breastfeeding. The adjusting variables were also predictors of breastfeeding behavior in their own right. CONCLUSIONS: Our results show that NA and GSE are important antenatal predictors of breastfeeding status at 6 months postpartum.

Published 24 December 2007 in J Pediatr, 152(1): 68-72.
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