A recent study conducted by the University of Pretoria has revealed a significant link between exposure to tobacco smoke at home and childhood stunting in sub-Saharan Africa. The study, which analyzed health data from 327,881 mother-child pairs across 29 countries, found that 21.1% of children were exposed to tobacco smoke inside their homes, while 24.7% were stunted.
The study, one of the largest on the relationship between household tobacco smoke and childhood growth, found that children whose mothers smoked had an 11% higher prevalence of stunting than those with no reported tobacco smoke exposure. Daily smoking inside the home was associated with a 3% higher prevalence of stunting. Lead researcher Dr. Anesu Marume noted that the scale of the study helped researchers examine an issue that has been difficult to assess in individual countries.
According to Dr. Marume, maternal smoking is relatively uncommon in much of sub-Saharan Africa, but children's exposure to tobacco smoke in the home is not. The study found that around one in five children live in a home where smoking occurs. Stunting occurs when children are shorter than expected for their age due to chronic growth restriction, reflecting the cumulative effects of nutrition, illness, and environmental conditions during important stages of development.
The study also found that the relationship between tobacco smoke exposure and stunting was stronger among children aged between 24 and 59 months than among those younger than two. Professor Ute Feucht, a paediatrician and researcher at UP's Research Centre for Maternal, Foetal, Newborn and Child Health Care Strategies, emphasized that childhood growth is shaped by several factors, including nutrition, illness, and the environment in which a child lives.
Researchers suggest that tobacco smoke could potentially affect growth through several pathways, including impaired foetal growth and lower birth weight during pregnancy, and respiratory illness, inflammation, and impaired nutrient absorption after birth. Children can also be exposed to third-hand smoke, which refers to residues left behind on clothing, skin, dust, and household surfaces.
The study's findings have significant implications for African governments, which should consider comprehensive smoke-free protections, particularly in vehicles carrying children, childcare environments, and shared residential spaces. Senior author Professor Olalekan Ayo-Yusuf emphasized that protecting children from tobacco smoke is not only a tobacco control issue but also a nutrition and maternal and child health issue.
The University of Pretoria's study highlights the need for governments to take a comprehensive approach to protecting children's health, including helping parents and caregivers who smoke to quit. The study's results underscore the importance of addressing tobacco smoke exposure as a critical factor in promoting healthy growth and development in children across sub-Saharan Africa.
Key points
- Exposure to tobacco smoke at home is associated with an 11% higher prevalence of stunting in children.
- One in five children across sub-Saharan Africa are exposed to tobacco smoke inside their homes.
- Protecting children from tobacco smoke is a critical aspect of broader child health efforts.
