Related Experiment Videos
Relation between lead and cadmium in blood and the involuntary smoking of children
S Willers1, A Schütz, R Attewell
1Department of Occupational and Environmental Medicine, Lund University, General Hospital, Malmö, Sweden.
Insights
Children exposed to secondhand smoke had higher blood lead levels (PbB). Parental smoking significantly increased children's PbB, with a dose-response effect observed, particularly from maternal smoking. Cadmium levels were unaffected.
Area of Science:
- Environmental Health
- Pediatric Toxicology
- Occupational Health
Background:
- Children's exposure to environmental toxins like lead and cadmium is a significant public health concern.
- Parental smoking is a common source of indoor air pollution, potentially impacting children's health.
- Geographic proximity to industrial sources, such as lead smelteries, can increase environmental lead exposure.
Purpose of the Study:
- To investigate the association between blood lead (PbB) and blood cadmium (CdB) levels in children and parental smoking habits.
- To explore the influence of proximity to industrial lead emissions on children's PbB and CdB levels.
- To identify potential mechanisms linking involuntary smoking to elevated PbB in children.
Main Methods:
- Cross-sectional study of 133 children aged 4-11 years from a lead smeltery town and rural area.
- Measurement of blood lead (PbB) and blood cadmium (CdB) levels.
- Collection of data on parental smoking habits and proximity to industrial emissions.
Main Results:
- Significant positive association found between higher children's PbB levels and involuntary (secondhand) smoke exposure at home.
- Children with non-smoking parents had lower PbB than those with one smoking parent, who in turn had lower levels than those with two smoking parents.
- Maternal smoking had a greater impact than paternal smoking, with a dose-response relationship observed between maternal tobacco consumption and children's PbB. PbB levels were higher in children near industrial lead emissions.
Conclusions:
- Involuntary smoking is a significant risk factor for elevated blood lead levels in children.
- The observed association between PbB and secondhand smoke is unlikely due to direct lead inhalation from tobacco smoke.
- A potential explanation involving small airways disease affecting lead absorption is proposed, warranting further investigation.
Abstract:
The blood lead (PbB) and blood cadmium (CdB) levels, as well as the parental smoking habits, of 133 children aged 4 to 11 years were studied. The children were from a town with a lead smeltery and a surrounding rural area. There was a significant association between the higher PbB levels of the children and involuntary (parental) smoking in the home. The CdB levels of the children were not affected by parental smoking habits. The children whose parents did not smoke at home had lower PbB values than those with one smoking parent. These children, in turn, had lower levels than children with two smoking parents. Mothers who smoked had a greater impact than fathers who smoked. There was also a dose-response relationship between the amount of tobacco smoked by the mother and the PbB level of the child. The PbB value was higher for the children living near industrial lead emissions than for children from the rural area. The association between PbB level and involuntary smoking is probably not due to inhalation of lead originating from tobacco smoke. A small airways disease affecting the absorption of inhaled lead particles is proposed as an explanation.