Study of cardiovascular risk factors among children and adolescents of the island of Samos

Doctoral Dissertation uoadl:2693253 380 Read counter

Τομέας Υγείας - Μητέρας - Παιδιού
Library of the School of Health Sciences
Deposit date:
Grammatikos Evangelos
Dissertation committee:
Καφετζής Δημήτριος, Καθηγητής, Ιατρική, Ε.Κ.Π.Α
Γουργιώτης Δημήτριος, Καθηγητής, Ιατρική, ΕΚΠΑ
Γαρούφη Αναστασία, Αναπληρώτρια Καθηγήτρια, Ιατρική, ΕΚΠΑ
Τσολιά Μαρία, Καθηγήτρια, Ιατρική, ΕΚΠΑ
Ατιλλάκος Αχιλλέας, Επίκουρος Καθηγητής, Ιατρική, ΕΚΠΑ
Κόσσυβα Λυδία, Επίκουρη Καθηγήτρια, Ιατρική, ΕΚΠΑ
Σολδάτου Αλεξάνδρα, Επίκουρη Καθηγήτρια, Ιατρική, ΕΚΠΑ
Original Title:
Μελέτη παραγόντων καρδιαγγειακού κινδύνου σε παιδιά και εφήβους της νήσου Σάμου
Translated title:
Study of cardiovascular risk factors among children and adolescents of the island of Samos
Introduction: Cardiovascular disease (CVD) constitutes one of the leading causes of morbidity and mortality in Western countries. Lipid disorders, hypertension, tobacco smoking, reduced physical activity, alcohol abuse and chronic inflammation are considered as risk factors for premature atherosclerosis and CVD. Obesity, which among children and adolescents has become an epidemic, is one of the most important causes that leads to the establishment of many of the aforementioned risk factors. Worrisome is the fact that obesity as well as other risk factors for CVD may persist or track into adulthood.
Purpose: To detect children and adolescents, aged 8-18 years, in west Samos island, who are in danger for early acceleration of atherosclerotic process and adult CVD, especially coronary heart disease.
Materials and Methods: An observational, cross-sectional study. Study population consisted of 1,003 subjects, aged 8-18 years, 263 children and 740 adolescents, 514 males and 489 females, from west Samos island (Karlovasi area, a semi-urban and rural area). Detailed family history was taken and clinical examination, including anthropometric and blood pressure (BP) measurements, was performed in all participants. Laboratory tests were conducted in 812 out of 1,003 participants (81%). Serum lipids, lipoproteins, apolipoproteins, high sensitivity C-reactive protein levels, and plasma homocysteine levels were measured in overnight fasting blood samples. Non-HDL-C and atherosclerotic markers were calculated. Statistical analysis was conducted using Stata v.13. P<0.005 was considered statistically significant.
Results: Increased body mass index (BMI) was found in 40.2 % (overweight: 26.5%, obese: 13.7%) of the total study population. No statistically significant difference between obese/overweight children and adolescents was found. Among adolescents, obesity was more common in boys. Median levels of LDL-C and non-HDL-C were 93 mg/dl and 110 mg/dl respectively. Mean levels of homocysteine were 4.25 (±2.55) μmol/L and median 3.7 μmol/L. Boys had higher levels of homocysteine, not associated with BMI status. Overweight and obese children/adolescents had significantly higher triglycerides, Lp(a) and apo-B, lower HDL-C and more unfavorable atherosclerotic markers compared with normoweight individuals. Females had significantly higher total cholesterol and HDL-C than males. 11.3% of the adolescents were smokers and 33.2% consumed alcoholic beverages (9.9% consumed considerable amounts of alcohol). Average screen time was 7.8 (SD: 4.3) hours per week and was positively correlated with triglycerides. Mild, moderate and intense exercise was reported by 34%, 52% and 13.9% of the participants respectively. Smokers exercised less, had lower HDL-C and consumed alcohol more frequently. Females exercised more often and more intensely, had less screen time and consumed less often and less amount of alcohol compared with males. Adolescents who lived in a rural area consumed alcohol more frequently than those who lived in a semi-urban area. Moreover, adolescents who consumed alcohol had higher BP and triglycerides but lower HDL-C, while alcohol abuse was an important risk factor for higher triglycerides, LDL-C, and non-HDL-C. Intense exercise was correlated with lower systolic BP.
Conclusion: An unexpected high percentage of children and adolescents living in non-urban areas of a remote island in Greece, were overweight or obese and had adopted unhealthy lifestyle habits such as tobacco smoking and alcohol consumption. These habits were associated with well-known risk factors for premature atherosclerosis, such as higher BP and dyslipidemia.
Main subject category:
Health Sciences
Samos, Greece, Adolescents, Children, Obesity, Dyslipidemia, Blood presure
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