Browsing by Author "Can, Gunay"

Now showing 1 - 6 of 6

Diverging Sex-Specific Long-Term Effects of Cigarette Smoking on Fasting Insulin and Glucose Levels in Non-Diabetic People
(Pergamon-elsevier Science Ltd, 2012) Onat, Altan; Can, Gunay; Cicek, Gokhan; Dogan, Yuksel; Kaya, Hasan; Gumrukcuoglu, Hasan Ali; Yuksel, Husniye
Objectives: We determined in non-diabetic persons the associations of current smoking with future glucose and insulin concentrations. Design and methods: Middle-aged non-diabetic adults (n = 1071) were studied in whom these values were measured at baseline and 5.2-years later. Results: Age-adjusted fasting insulin concentrations in 137 smoking men remained lower than never smokers at both surveys. While age-adjusted fasting glucose values in male never smokers declined at follow-up (p = 0.037), they rose in male smokers. In 94 female smokers, age-adjusted fasting insulin values marginally declined, and fasting glucose was reduced (by 0.09 mmol/L., p = 0.055) during follow-up. In contrast in never-smoking women, insulin and glucose concentrations rose (p < 0.001 in both). Age-adjusted insulin levels in former smokers exhibited similar trends as never smokers. Trends were essentially unchanged when adjustment included body mass index. Current male smokers demonstrated evidence of reduced insulin sensitivity, female smokers of improved one, as assessed by QUICKI. Conclusion: Smoking among Turks induces at long-term lower fasting insulin levels which represent improved insulin sensitivity in women, yet a reduced one in men. (C) 2011 The Canadian Society of Clinical Chemists. Published by Elsevier Inc. All rights reserved.
Female and Urban Participants Demonstrate an Adverse Trend in Overall Mortality in Turkey - and a Report on the Tarf Survey 2016
(Turkish Soc Cardiology, 2017) Onat, Altan; Ozbek, Mehmet; Karakoyun, Suleyman; Uzun, Okan; Keskin, Muhammed; Karadeniz, Yusuf; Can, Gunay
Objective: This study is an examination of 1) overall mortality trend in the Turkish Adult Risk Factor (TARF) study stratified by sex and place of residence, and 2) brief report on main aspects of the 2016 survey. Methods: The period of last 18 years was divided into 2 for trend analysis of data. Required information on deaths was obtained. Baseline age >= 40 years at the beginning of each period was the inclusion criterion. Cox regression analyses were performed. Results: Among over 2500 participants in each, deaths were recorded in 281 and 334 individuals in Periods 1 and 2, respectively, and baseline mean age was 54.6 years and 56.4 years, respectively, in each period. Age-adjusted hazard ratio for mortality in Period 2 remained virtually the same for rural males, rose to borderline significance for urban males and rural females (p=0.06, p=0.09), and increased 1.72-fold for urban females (p=0.006), as compared to Period 1. Whereas males gained an average of 3.8 years of survival in the later period compared with the earlier period, females gained only 1.8 years. This narrowed the difference in mean age at death in favor of women from 2.5 years to 0.5 year. Of 1144 participants to be surveyed in the TARF 2016, 48 were lost to follow-up, 695 were examined, and 39 participants were ascertained to be deceased. In 362 cases, verbal information was obtained regarding health status. Conclusion: Gain in survival in Turkish women has distinctly stagnated compared with men, and hazard of death has risen significantly for women and urban residents in the past decade, suggesting interaction between female sex and urban residence. Both phenomena require recognition and adoption of appropriate measures.
Regional Distribution of All-Cause Mortality and Coronary Disease Incidence in Turkey: Findings of Turkish Adult Risk Factor Survey 2010
(Turkish Soc Cardiology, 2011) Onat, Altan; Murat, Sani Namik; Cicek, Gokhan; Ayhan, Erkan; Ornek, Ender; Kaya, Hasan; Can, Gunay
Objectives: We analyzed the distribution of cumulative allcause and cardiovascular mortality and incident coronary heart disease (CHD) across the seven geographic regions of Turkey and presented overall and coronary mortality findings of the 2010 survey of the Turkish Adult Risk Factor Study. Study design: A total of 1406 participants were surveyed. Information on the mode of death was obtained from firstdegree relatives and/or health personnel of local heath offices. Information on survivors was obtained from history, physical examination, and 12-lead electrocardiography. Results: Of the surveyed participants, 686 were examined; information on health status was obtained in 577 subjects, and 32 participants (14 women, 18 men; mean age 72.3 +/- 15.6 years) were ascertained to have died. The total duration of follow-up was 2,520 person-years. Nineteen deaths were of coronary (n=16) or cerebrovascular (n=3) origin. Cumulative 20-year assessment of the entire cohort for the age bracket of 45-74 years disclosed a high coronary mortality rate, being 7.4 and 4.1 per 1000 person-years in men and women, respectively, and representing a limited decline after year 2000. Ageadjusted Cox regression analysis comprising 433 deaths and 506 incident CHD cases over a 7.3-year follow-up showed similar mortality rates across the regions, and a significantly high CHD incidence in males of the Black Sea and Marmara regions and in females of the Southeast Anatolia. Currently, 480,000 incident CHD cases are estimated yearly in Turkey. Conclusion: The high age-adjusted overall mortality in Turkey shows nonsignificant differences across geographic regions, whereas the age-adjusted CHD incidence is high in the Black Sea and Marmara regions.
Serum Total and High-Density Lipoprotein Phospholipid Levels in a Population-Based Study and Relationship To Risk of Metabolic Syndrome and Coronary Disease
(Sage Publications inc, 2008) Hergenc, Gulay; Onat, Altan; Sari, Ibrahim; Yazici, Mehmet; Eryonucu, Beyhan; Can, Gunay
The aim of study was to investigate the role of serum total (TPL) and high-density lipoprotein phospholipids (HDL-pl) as a risk factor in coronary heart disease (CHD) and metabolic syndrome (MS). In a random sample, total and HDL-pI were measured in 1088 and 642 adults from Turkey, respectively, who have a high prevalence of MS; this was done with an enzymatic method that measures total phosphatidylcholine, sphingomyelin, and lysophosphatidylcholine. Serum TPL and HDL-pl levels were significantly higher in women (TPL, 2.8 mmol/L; HDL-pl, 1.21 mmol/L) than in men. Strong correlations existed between serum TPL levels and non-HDL cholesterol (HDL-C), triglycerides, apolipoprotein (apo) B, complement C3, and gamma-glutamyltransferase. Non-HDL-C, HDL triglyceride, and apo A-I were strongly correlated with HDL-pl. Linear regression analyses revealed HDL-C, apo B, triglycerides, diabetes, and female gender as independent significant determinants of TPL levels in adults. HDL-C and impaired glucose regulation were sole significant variables, together contributing one-quarter of serum HDL-pl. Individuals with MS or diabetes had significantly higher TPL concentrations. The gender- and age-adjusted odds ratio (OR) of TPL for MS was 1.73 (95% confidence interval, 1.35-2.21), whereas the multiadjusted OR of HDL-pl per 1 SD increment corresponded to a significantly reduced independent MS likelihood by 26% in women (and 18% in the entire group). The multiadjusted OR of HDL-pl for CHD in men and women combined was 0.32 (P =.057) corresponding to a reduced CHD likelihood by 32% per I SD increment of HDL-pl. Plasma TPL levels point to an adverse relationship to MS, whereas their role in CHD risk needs further investigation. HDL-pls, in contrast, mark substantial protection from MS as well as from CHD.
Turkish Adult Risk Factor Study Survey 2012: Overall and Coronary Mortality and Trends in the Prevalence of Metabolic Syndrome
(Turkish Soc Cardiology, 2013) Onat, Altan; Yuksel, Murat; Koroglu, Bayram; Gumrukcuoglu, H. Ali; Aydin, Mesut; Cakmak, H. Altug; Can, Gunay
Objectives: We aimed to analyze 1) overall and coronary mortality findings in the Turkish Adult Risk Factor (TARF) study survey 2012 and 2) the temporal trends in the prevalence of metabolic syndrome (MetS) and its distribution across seven geographic regions. Study design: Information on the mode of death was obtained from first-degree relatives and/ or health personnel of a local health office. Information collected in survivors was based on history, physical examination of the cardiovascular system and Minnesota coding of resting electrocardiograms. Results: Of 1527 participants to be surveyed, 796 were examined. Information was obtained on the health status in 502 subjects, and death was ascertained in 56 participants. Thirty deaths were attributed to coronary and cerebrovascular disease. Cumulative 22-year evaluation of participants in the age bracket 45-74 years revealed coronary mortality to be high, with 7.6 per 1000 person-years in men and 3.8 in women. Data used from 1754 identical subjects (median age 46 years initially), and examined in two periods 12 years apart, indicated an increase in the prevalence of MetS by 1.3% per aging of 1 year. Analysis across geographic regions showed a rise in the prevalence in the Mediterranean region, already having highest prevalence along with thr Southeast Anatolia, while the prevalence declined in the Marmara region and persisted to be thr lowest in the Aegean region. Conclusion: The prevalence of MetS in Turkish adults aged 40 years or over, currently standing at 53%, shows significant differences across geographic regions, being highest in the two southern regions and lowest in the Aegean region.
The Turkish Adult Risk Factor Survey 2009: Similar Cardiovascular Mortality in Rural and Urban Areas
(Turkish Soc Cardiology, 2010) Onat, Altan; Ugur, Murat; Cicek, Gokhan; Ayhan, Erkan; Dogan, Yuksel; Kaya, Hasan; Can, Gunay
Objectives: We analyzed the 2009 survey of the Turkish Adult Risk Factor (TARF) Study to assess the distribution of all-cause and cardiovascular mortality in urban and rural areas and gender-specific coronary mortality in the age-range of 45 to 74 years. Study Design: The Marmara and Central Anatolian regions have been surveyed every odd year in the TARF Study. In 2009, 1,655 participants were surveyed. Information on the mode of death was obtained from first-degree relatives and/or health personnel of local heath office; 960 participants underwent physical examination and ECG recording, and 572 subjects were evaluated on the basis of information obtained regarding health status. Results: In the survey, 23 men and 20 women were ascertained to have died. Twenty-one deaths were attributed to coronary disease and four deaths to cerebrovascular events. Assessment of the entire cohort in the age range of 45-74 years after a 19-year follow-up disclosed a high coronary mortality with 7.5 per 1000 person-years in men and 3.9 in women. In a Cox regression analysis comprising 405 deaths (235 cardiovascular) and over 24,000 person-year follow-up, age- adjusted cardiovascular mortality was similar in rural and urban participants. All- cause mortality was higher in females living in urban areas than those living in rural areas (HR 1.41; 95% CI 1.02-1.96). Conclusion: Cardiovascular mortality both in absolute terms and as a share of overall mortality persists to be high among Turkish adults, with similar rates in urban and rural areas. Age-adjusted all-cause mortality rate is higher among urban versus rural women.