Øyvind Erik Næss,Marit Aase Rognerud,Bjørn Heine Strand,Else-Karin Grøholt,Sidsel Graff-Iversen,Anett Arntzen,Odd Steffen Dalgard,Malin M C Eberhard-Gran,Merete Åse Eggesbø,Rune Johansen,Petter Kristensen,Eiliv Lund,Marit Låg,Kristin Schjelderup Mathiesen,Marita Melhus,Haakon E Meyer,Per Nafstad,Kari Slinning,Anne-Johanne Søgaard,Leila Torgersen,Margarete E. Vollrath,Per Henrik Zahl,
(2007). Sosial ulikhet i helse : en faktarapport. ISBN 978-82-8082-187-4. 68 s.
Objective: To measure the impact of the personality traits of Negative Affectivity and General Self-Efficacy measured during pregnancy to predict breastfeeding status at 4-months postpartum, adjusting for cesarean section, premature birth, parity, maternal age, and years of maternal education. Design: Prospective cohort study. Setting: The data collection was conducted as part of the Norwegian Mother and Child Cohort Study at the Norwegian Institute of Public Health. The national sample of 29,581 mothers completed assessment of Negative Affectivity and General Self-Efficacy at gestation weeks 17 and 30 and completed a self-report questionnaire at 6-months postpartum capturing detailed information about nutrition from birth thru 6 months. Outcome Measures: Mothers were classified with a cut-off at 4 months in the groups full breastfeeding, mixed breastfeeding, and bottle feeding. Results: We found that each interval of high Negative Affectivity increased the odds ratio of mixed breastfeeding (OR, 1.39; 95% CI, 1.27-1.51) and bottle feeding (OR, 1.56; 95% CI, 1.39-1.76), compared to full breastfeeding. Each interval of high General Self-Efficacy decreased the odds ratio of bottle feeding at 4 months (OR, 0.89; 95% CI, 0.83-0.96) but not of mixed breastfeeding (OR, 1.00; 95% CI, 0.95-1.04), compared to full breastfeeding. Conclusions: Our results support the hypothesis that Negative Affectivity and General Self-Efficacy are important antenatal predictors of breastfeeding 4 months postpartum. Adequately addressing the concerns and difficulties of mothers high in Negative Affectivity and low in General Self-Efficacy during prenatal and antenatal care could help prevent difficulties to sustain full breastfeeding.