Faculty of Medicine

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Overweight hypothesis in asthma and eczema in young adolescents
(Elsevier BV, 2006)
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Stavric, Katerina
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Seckova, Lidija
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Kimovska, Milica
BACKGROUND: A positive association between body mass index (BMI) and allergic diseases has recently been suggested; however the sex-dependence of this association remains controversial. The aim of the present study was to explore the relationship between BMI and asthma and eczema, as well as its sex-dependence in young adolescents. METHODS: Self-reported data obtained through the standardized International Study of Asthma and Allergies in Childhood (ISAAC) Phase Three written questionnaires of 2926 young adolescents aged 13-14 years old from randomly selected schools in Skopje (Republic of Macedonia) were used. The BMI for each individual was calculated and used-both unadjusted and adjusted for confounding factors-as a variable for analysis. The international cut-off points for BMI for overweight and obesity by sex and age were used. Because of the very low prevalence of obesity (1.5 %), obese respondents were included in the overweight group. The data were statistically analyzed by the chi-square test, the t-test for independent samples and odds ratios (OR, 95 % CI) in binary logistic regression. RESULTS: Being overweight was significantly associated with an increased risk of having a dry night cough without a cold or chest infection (adjusted OR: 1.54; 95 % CI: 1.09-2.16; p = 0.01) and with having had self-reported asthma at some time (adjusted OR: 2.36; 95 % CI: 1.02-5.44; p = 0.04) in boys only. A significant association between overweight and other symptoms of asthma or atopic eczema was not established. CONCLUSION: These findings suggest a male-specific positive association between overweight and a current dry night cough and having received a diagnosis of asthma at some time. No association was found with other asthma symptoms or atopic eczema in young adolescents.
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Influence of physical activity and television-watching time on asthma and allergic rhinitis among young adolescents: preventive or aggravating?
(Elsevier BV, 2008)
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Stavric, Katerina
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Seckova, Lidija
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Kimovska, Milica
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BACKGROUND: Related to exercise hypothesis, the aim of the present study was to explore the influence of physical activity on asthma and allergic rhinitis in a developing country where publicity campaigns about the benefits of exercise are scarce. METHODS: The analysed data were self-reported and obtained through the standardized International Study of Asthma and Allergies in Childhood Phase Three written questionnaires completed by 3026 adolescents 13/14 year old in Skopje (Republic of Macedonia). Vigorous physical activity and television-watching timeboth unadjusted and adjusted for confounding factorswere used as variables for analysis. Odds ratios (OR, 95 % CI) in binary logistic regression were employed for statistic analysis of the data. RESULTS: Vigorous physical activity both > or = 3 times and 1-2 times per week was associated with an increased risk of current wheeze (aOR: 1.66; 1.08-2.55; p = 0.020 and aOR: 1.70; 1.23-2.36; p = 0.001, respectively), speech-limiting wheeze (aOR: 3.15; 1.13-8.77; p = 0.028 and aOR: 4.62; 2.22-9.62; p = 0.000, respectively) and exercise-induced wheeze (aOR: 2.72; 1.93-3.83; p = 0.000 and aOR: 4.01; 3.12-5.14; p = 0.000, respectively). Frequent physical activity was positively associated only with current allergic rhinitis symptoms (aOR: 1.40; 1.04-1.90; p = 0.029). Television watching > or = 3 hours a day increased the risk of current wheeze (aOR: 1.34; 1.01-1.77; p = 0.042) and exercise-induced wheeze (aOR: 1.32; 1.05-1.65; p = 0.016). CONCLUSION: The findings support the aggravating role of sedentary regimen and poor physical fitness on asthma symptoms, but not on allergic rhinitis. Physical activity may trigger asthma symptoms when physical fitness is poor and asthma is not controlled.
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Do household tobacco smoking habits influence asthma, rhinitis and eczema among 13-14 year-old adolescents?
(Elsevier BV, 2011)
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Stavric, Katerina
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Seckova, Lidija
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Kimovska, Milica
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BACKGROUND: Although the harmful impact of environmental tobacco smoke on respiratory health in early childhood is well known, its effect in adolescence is still ambiguous. This study aims to examine if parents' and household tobacco smoking habits influence asthma, rhinitis and eczema in early adolescence in The Republic of Macedonia, as a country with a very high rate of household tobacco smoke exposure despite the smoking cessation campaign, and low prevalence rates of asthma, rhinitis and eczema. METHODS: Children aged 13-14 years (n=3026) from randomly selected schools in Skopje, the capital of Macedonia, completed by themselves the standardised International Study of Asthma and Allergies in Childhood (ISAAC) Phase Three written questionnaires on asthma, rhinitis, eczema and potential environmental risk factors. Maternal and paternal tobacco smoking habits and the number of smokers in households were separately correlated to current and ever-diagnosed asthma, rhinitis and eczema by odds ratios (OR, 95% CI) with and without adjustments for potential confounders using binary logistic regression. RESULTS: The maternal smoking habit was significantly positively associated only with current night dry cough apart from chest infection (aOR: 1.26; 1.03-1.54; p=0.026). No significant association was observed in relation to the other studied variables with either parental smoking habits or the number of smokers in the household. CONCLUSION: Household tobacco smoking habits were not found to have a significant influence on asthma, rhinitis and eczema in young adolescents. The established results point out the dominant influence of maternal smoking on cough as an unspecific asthma symptom.
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The self-reported density of truck traffic on residential streets and the impact on asthma, hay fever and eczema in young adolescents
(Elsevier BV, 2014)
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Stavric, Katerina
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Seckova, Lidija
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Kimovska Hristova, Milica
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BACKGROUND: Conflicting results have been reported, mostly in developed countries, on the relationship between exposure to traffic and allergic diseases. This study aims to examine the impact of truck traffic on asthma, rhinitis and eczema in early adolescence in Skopje, the capital of the Republic of Macedonia, as a developing country with a lower middle rate of high truck traffic exposure and low prevalence rates of allergic diseases. METHODS: Self-reported data was used, obtained through the International Study of Asthma and Allergies in Childhood Phase 3 written questionnaires, from 3026 adolescents aged 13-14 years from Skopje. Truck traffic density on the street of residence on weekdays was correlated to current and ever-diagnosed asthma, rhinitis and eczema by odds ratios (OR, 95% CI) in binary logistic regression, with and without adjustments for potential confounding factors separately and for their joint effect. RESULTS: A positive association of truck traffic density appeared to be limited to current dry night cough (aOR: 1.63; 1.07-2.47; aOR: 2.17; 1.40-3.35; and aOR: 2.33; 1.43-3.79 for truck traffic seldom, frequently through the day, and almost the whole day, respectively) with an exposure-response relationship and to current wheeze only for truck traffic almost the whole day (aOR: 1.87; 1.02-3.42). CONCLUSION: The findings suggest an aggravating effect of truck traffic on current asthma symptoms, but not on asthma, allergic rhinitis and eczema diagnoses. It seems that it probably has an impact as a direct respiratory irritant in early adolescence.

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