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    Effect of chronic diseases and associated psychological distress on health-related quality of life
    (Wiley, 2007) Keleş, H.; Ekici, A.; Ekici, M.; Bulcun, E.; Altinkaya, V.
    Background: The purpose of this study was to clarify the correlations between the presence of comorbidities and psychological distress and health-related quality of life (HRQL). This was a population-based cross-sectional study. Methods: Parents and grandparents of students from seven randomly selected primary schools in the city centre were asked to answer questionnaires sent by their children. All subjects were questioned for somatic diseases, psychological distress and HRQL by Health Questionnaire, Hospital Anxiety and Depression scale and short-form-12 health survey, respectively. Results: Out of 5024 parents and grandparents (mean age 52.3 +/- 14.3 years, range 20-104 years) of primary school students 4605 returned the questionnaires, a figure that corresponds to the overall response rate of 91.6%. Chronic diseases substantially reduced HRQL and this effect did not differ markedly with the type of chronic disease. Association of comorbidities with psychological distress further impaired HRQL. As the number of chronic diseases was increased, HRQL and physical and mental functioning declined. The worst HRQL was observed in subjects who had five or more comorbidities associated with psychological distress. Conclusion: The present study indicates significant adverse effects of chronic diseases and psychological distress on HRQL in adults, the effect of psychological distress being the most important. Our results lead us to suggest that in the management of comorbidities, the detection of the presence and severity of associated psychological distress and its treatment, besides the specific treatment of comorbidities, may provide dramatic improvement in HRQL of the patients.
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    Frequencies of serum antibodies to Helicobacter pylori CagA and VacA in a Turkish population with various gastroduodenal diseases
    (Blackwell Publishing, 2006) Sezikli, M.; Guliter, S.; Apan, T. Z.; Aksoy, A.; Keleş, H.; Özkurt, Z. N.
    Infection with Helicobacter pylori (H. pylori) strains secreting cytotoxin-associated gene A (CagA) and vacuolating cytotoxin A (VacA) proteins is associated with more severe gastroduodenal pathologies. However, this association varies among geographical regions and ethnic groups. We investigated the frequencies of antibodies to CagA and VacA proteins in 131 H. pylori-infected dyspeptic patients [40 duodenal ulcer (DU), 19 gastric ulcer (GU), 28 gastric cancer (GC), and 44 non-ulcer dyspepsia (NUD)] across 30 H. pylori-infected and endoscopically normal asymptomatic subjects (AS). Anti-CagA and anti-VacA antibodies were detected by Western blotting. The positivity rates of anti-CagA and anti-VacA antibodies were higher in patients with DU (92.5 and 75%), GU (89.5 and 84.2%) and GC (96.4 and 85.7%) than patients with NUD (70.5 and 50%) and AS (50 and 23.3%) (p < 0.05). CagA(+)VacA(+) phenotype was more frequent in patients with DU, GU and GC than patients with NUD and AS (75, 84.2, 85.7 vs. 47.7 and 20%, respectively) (p < 0.01). Our results showed that there is a significantly positive association between the presence of anti-CagA and anti-VacA antibodies and DU, GU and GC in our region.