The impact of maternal flood-related stress and social support on offspring weight in early childhood
The current study examined the moderating role of social support in the association between prenatal maternal stress (PNMS) and childhood body mass index (BMI) in the context of the Iowa floods of 2008. In addition, the mediating role of offspring birthweight was examined in the association between PNMS and childhood BMI. We recruited women from eastern Iowa who were pregnant in 2008 when disastrous floods occurred. Self-report measures of PNMS and cognitive appraisal of the flood’s consequences were obtained shortly after the disaster. Social support was assessed during pregnancy. Offspring anthropometric measures were collected at birth and 30 months. Moderated mediation results indicated that greater PNMS predicted greater BMI at age 30 months through effects on higher birthweight as a mediator, but only for participants with low social support. High social support (satisfaction or number) buffered the effect of PNMS or a negative appraisal of the flood on birthweight. The combination of high PNMS or a negative appraisal of the flood’s consequences and low social support resulted in higher offspring birthweight, which predicted greater BMI at 30 months. Providing strong social support to pregnant women following a stressor might buffer the effects of PNMS on offspring birthweight and later obesity.
KeywordsPrenatal maternal stress Cognitive appraisal Social support Birthweight Natural disaster Trauma Childhood weight
Body mass index
Prenatal maternal stress
Compliance with ethical standards
All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards.
Conflict of interest
The authors declare that they have no conflict of interest.
- Cohen S, Syme SL (1985) Issues in the study and application of social support. Soc Support Heal 3:3–22Google Scholar
- Dancause KN, Laplante DP, Hart KJ et al (2015) Prenatal stress due to a natural disaster predicts adiposity in childhood: the Iowa Flood Study. J Obes. https://doi.org/10.1155/2015/570541
- UNICEF, WHO, The World Bank Group (2016) Levels and trends in child malnutrition: UNICEF-WHO-World Bank joint child malnutrition estimates. Available at: http://www.who.int/nutgrowthdb/estimates2015/en/
- Hayes A (2013) Introduction to mediation, moderation, and conditional process analysis. Guilford Press, New York, pp 3–4Google Scholar
- Hollingshead A (1975) Four factor index of social status. Yale J Sociol 8:21–52Google Scholar
- Laplante DP, Zelazo PR, Brunet A, King S (2007) Functional play at 2 years of age: effects of prenatal maternal stress. Infancy 12:69–93. https://doi.org/10.1111/j.1532-7078.2007.tb00234.x CrossRefGoogle Scholar
- Li J, Olsen J, Vestergaard M et al (2010) Prenatal stress exposure related to maternal bereavement and risk of childhood overweight. PLoS One. https://doi.org/10.1371/iournal.pone.0011896
- Marmar, CR, Weiss DS, Metzler TJ (1997) The peritraumatic dissociative experiences questionnaire.Assess Psych Trauma PTSD 2:144-68Google Scholar
- Watson D, O'Hara MW, Simms LJ, Kotov R, Chmielewski M, McDade-Montez EA, Gamez W, Stuart S (2007) Development and validation of the Inventory of Depression and Anxiety Symptoms (IDAS). Psychol Assess 19:253Google Scholar
- Watson D, O'Hara MW, Chmielewski M, McDade-Montez EA, Koffel E, Naragon K, Stuart S (2008) Further validation of the IDAS: evidence of convergent, discriminant, criterion, and incremental validity. Psychol Assess 20:248Google Scholar
- Weiss D, Mamar CR (1997) The Impact of Event Scale-Revised. Assess Psychol trauma PTSD:399–411. https://doi.org/10.1016/j.janxdis.2007.02.007