Respiratory Symptoms and Urinary Cotinine Levels in Pre-school Children Exposed to Environmental Tobacco Smoke

Household smoking impact on the oral health of 5- to 7-years-old children

BACKGROUND

Children's exposure to secondhand smoke, particularly by their parents, could adversely affect their oral health. Thereby, this study aimed to assess the oral health status of children subjected to household smoking and the impact of smoking patterns on the severity of oral health deterioration.

METHODS

A total of 210 healthy children were enrolled in this case-control study and allocated into children subjected to household smoking (HS) and control groups. Participants' guardians were asked to complete a questionnaire regarding sociodemographic characteristics and parental smoking habits. All participants were subjected to clinical dental examination to assess dental caries (ICDAS), hypomineralized primary molars (HSPM), and gingival status (GI). Stimulated saliva samples were collected to assess saliva composition and characteristics. Urine samples were collected and analyzed for cotinine concentration. Data were analyzed using SPSS (v.25) software at a test value of p ≤ 0.05. The t-student test was used to find significant differences between participants' age, gingival index score, saliva pH, flow rate, sIgA, and cotinine level. The Chi-square test was used to test for the significance of parental employment, number of rooms, gender, sweets consumption, brushing frequency, and HMPM. The correspondence analysis was used to test for significance of parents' levels of education, type of house ventilation, ICDAS score, smoking form, frequency, and smoking pattern. The correlation between cotinine level and sIgA was tested for association using Bivariate correlation test.

RESULTS

The HS group showed a significantly increased risk for dental caries (p < 0.000), HSPM lesions (p = 0.007), and GI score (p < 0.000). A significant reduction in salivary flow rate, saliva pH, and sIgA were evident in HS group (p < 0.000). Parental consumption of more than 20 cigarettes/day was accompanied by increased dental caries activity (p < 0.000) and higher risk for increased severity of gingival inflammation (p < 0.000) of children in the HS group. Children of parents who smoke cigarettes and use the hubble/bubble anywhere in the house found to have greater distribution of HSPM (p < 0.000). Reduced sIgA values were found to be significantly associated with increased cotinine concentrations in HS children (p < 0.000).

CONCLUSIONS

Frequent exposure to household smoking could be associated with an increased risk of dental caries progression, enamel hypomineralization, gingival inflammation, and saliva characteristics changes in children.

The Relationship Between Personal Factors, Smoke Exposure at Home, and Respiratory Problems in Early Childhood in Nakhon Si Thammarat Province, Thailand

Purpose

The purpose of this study was to examine the relationship between personal factors, smoke exposure at home, and respiratory problems in early childhood in Nakhon Si Thammarat Province, Thailand.

Samples and Methods

This study was retrospective. There was a total of 414 samples in the study. The instruments included the questionnaire about the personal data of early childhood and their caregivers, the smoke exposure assessment form, and the early childhood respiratory problem assessment form. The relationship between personal factors, smoke exposure at home, and respiratory problems in early childhood was analyzed by the Chi-squared test and binary logistic regression.

Results

The results revealed that smoke exposure at home in early childhood was moderate (52.2%). There 68.8% had respiratory problems. The relationship between birth weight, and smoke exposure at home in early childhood was found to be significantly related to respiratory problems (X2 =5.014 p< 0.05 and X2 = 85.711 p< 0.001, respectively). It was found that children with a birth weight ≤2500g had respiratory problems at 2.55 times of the samples with birth weight >2500g (AOR = 2.55, 95% CI: 1.10-5.96), and moderate-high smoke exposure had respiratory problems at 8.86 times of the samples with low smoke exposure (AOR = 8.86, 95% CI: 5.39-14.60). Nutritional status and breastfeeding were not significantly related to respiratory problems in early childhood p > 0.05.

Conclusion

The birth weight and smoke exposure at home factors were found to be related to their respiratory problems in early childhood. Thus, it is necessary to reduce stimuli, especially smoking at home. Moreover, the standard birth weight of their early childhood will reduce the rate of respiratory problems.