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[Exposure to tobacco and cotinine levels in children]
R G Suárez López de Vergara1, C Galván Fernández, C Oliva Hernández
1Centro de Salud San Agustín, La Laguna, Tenerife.
Insights
Children exposed to secondhand smoke have elevated cotinine levels in saliva, directly correlating with parental smoking habits and exposure intensity. This highlights significant passive smoke exposure in children.
Area of Science:
- Environmental Health
- Pediatrics
- Toxicology
Background:
- Secondhand smoke (SHS) exposure is a significant health risk for children.
- Biomarkers like cotinine are crucial for objectively assessing SHS exposure.
- Understanding the relationship between parental smoking and children's exposure is vital for public health interventions.
Purpose of the Study:
- To quantify children's and parents' exposure to cigarette smoke.
- To measure cotinine levels in children's saliva as a biomarker of exposure.
- To correlate cotinine levels with parental smoking behaviors.
Main Methods:
- Saliva samples were collected from 151 children (aged 15 days to 17 years).
- Radioimmunoassay was used to measure cotinine levels in saliva.
- Questionnaires assessed parental smoking habits and in-home smoke exposure.
Main Results:
- Children exposed to passive smoke exhibited significantly higher saliva cotinine levels compared to unexposed children (p = 0.0001).
- A strong correlation was observed between children's cotinine levels and the daily number of cigarettes smoked by parents, both overall and specifically at home (p = 0.01 and p = 0.002, respectively).
- Smoker parents had higher cotinine levels than non-smoker parents (p = 0.0001).
Conclusions:
- Children exposed to secondhand smoke demonstrate elevated cotinine levels in their saliva.
- The degree of cotinine elevation in children is directly proportional to their level of exposure to parental smoking.
- These findings underscore the impact of household smoking on children's environmental smoke exposure.
Objective:
To evaluate the exposure of children and their parents to cigarette smoke by measuring cotinine levels in saliva.
Patients:
A total of 151 children (84 males and 67 females) aged 15 days to 17 years from hospital and extrahospital practices.
Method:
Questionnaire on exposure to cigarette smoke from their parents, saliva cotinine levels by radioimmunoassay.
Results:
Cotinine levels were higher in the passive smoker child than in the non-exposed child (p = 0.0001). A significant correlation was found between cotinine in the child and: a) total number of cigarettes smoked daily by both parents (p = 0.01); b) number of cigarettes smoked daily at home (p = 0.002), and c) number of cigarettes smoked at home in the 24 hours prior to sample obtention (p = 0.002). Higher levels of cotinine in the smoker parents than in the non-smoker parents were found (0.0001).
Conclusions:
The passive smoker child has high cotinine levels in saliva which are directly related to the exposure degree.