A family's socioeconomic status has a greater impact on children's health than smoking or drinking during pregnancy, according to a University of Exeter research team that analyzed more than 230,000 parents and children.
On the 25th, a research team led by Dr. Gemma Sharp of the University of Exeter in the UK released a paper stating that "a family's socioeconomic position (SEP) showed a stronger and more consistent association with children's health than parents' smoking, drinking, and caffeine intake before and after pregnancy."
The analysis drew on four large-scale cohort studies that tracked children and parents born in the UK and Norway between 1991 and 2008.
The team integrated this data to examine up to 232,139 people, comparing parents' smoking, drinking, and caffeine intake during pregnancy, along with socioeconomic status reflecting education level and occupation, against 72 health indicators measured from the children's birth to age 11. The indicators included body size at birth, body mass index (BMI), mental health, behavioral problems, social communication, blood pressure, and allergies.
The study found that the items showing a statistically significant association with children's health were "parental smoking" (6%), "drinking" (3%), and "caffeine intake" (0.4%). Among these, "low family socioeconomic status" ranked highest at 15%, ahead of all other factors.
Regarding these results, the team said they "suggest that efforts to improve children's health may be more effective when focused on reducing socioeconomic inequality rather than on parents' individual behaviors."
[Need to Refocus Existing Theory]
The Developmental Origins of Health and Disease (DOHaD) theory holds that the prenatal and early childhood environment affects lifelong health. Research in this field has so far focused mainly on the mother's environment before and after pregnancy, particularly the effects of the mother's health behaviors on the fetus.
The team pointed out that while a mother's health behaviors are closely intertwined with the socioeconomic environment and likely deeply connected to a father's health behaviors and the post-birth environment, studies addressing the influence of these factors have been relatively rare.
The actual analysis found no evidence that parents' health behaviors have a broad or large impact on children's health. Nor was there evidence that a mother's behaviors consistently have a greater impact on children's health than a father's.
Dr. Sharp, who led the study, said, "Socioeconomic disadvantage was more consistently associated with poorer health outcomes in children than smoking, drinking, or caffeine intake by either parent." She added, "This suggests that the socioeconomic environment in which a child grows up may have a greater impact on health than specific parental behaviors during pregnancy."
She continued, "In this study, the smoking, drinking, and caffeine intake of mothers and fathers showed very similar associations with children's health." She added, "This shows that not only behaviors during pregnancy but also the environment of the whole family and social conditions are important factors in determining children's health." The paper was published in the international journal PLOS Medicine.
