Pooled analysis of studies on DNA adducts and dietary vitamins.

Objectives: There is some evidence that dietary components that are rich in antioxidant and vitamins are inversely associated with DNA adduct levels induced by environmental carcinogens such as polycyclic aromatic hydrocarbons, although the epidemiologic data are inconsistent. This study addresses the association between vitamins, DNA adducts and smoking.

Methods: A combined analysis of individual data on the association between bulky DNA adducts and dietary vitamins was conducted.

Ochratoxin A and β2-microglobulin in BEN patients and controls.

Ochratoxin A (OTA) is a mycotoxin naturally occurring in different foods. OTA is arguably a risk factor for Balkan endemic nephropathy (BEN). The aims of this study are to (1) test the OTA-BEN association in BEN-groups and controls and (2) determine whether urine β2-microglobulin, a marker of impaired ability of the kidneys to re-absorb, is related to OTA.

Quality of care of patients with acute myocardial infarction in Bulgaria: a cross-sectional study.

Background: Cardiovascular diseases are the major cause of death in Bulgaria. Because of notable differences in mortality rates between Bulgaria and other European countries, we presume a tangible difference in the management of acute myocardial infarction (AMI) and an underutilization of evidence-based treatments. In order to determine the quality of care of patients with AMI in Bulgaria, we analyzed the appropriateness of current treatments and their relation to patient characteristics.

The effect of shift rotation on variations of cortisol, fatigue and sleep in sound engineers.

The aim was to study the effect of rotation direction on the time-of-day variations of cortisol, fatigue and sleep in sound engineers broadcasting in a life show. The salivary cortisol and ratings of stress, sleepiness and fatigue were followed at three hour intervals in 25 sound engineers: 13 working very fast forward-rotating shifts and 12 working very fast backward-rotating shifts. Cortisol was assessed with radioimmunological kits.

Stress and fatigue in sound engineers: the effect of broadcasting in a life show and shift work.

The aim was to study the time-of-day variations of cortisol, fatigue and sleep disturbances in sound engineers in relation to job task and shift work. The concentration of saliva cortisol and feeling of stress, sleepiness and fatigue were followed at three hour intervals in 21 sound engineers: 13 sound engineers, aged 45.1 +/- 7.

Satisfaction of inpatients with acute coronary syndrome in Bulgaria.

Background: Patient satisfaction constitutes an important indicator for the quality of care. During the last years, Bulgaria changed its socialist health care system to a market-driven system. Despite the fact that the improvement of health care quality and patient satisfaction were put on top of the list of goals for the health care reforms, no studies of patient satisfaction with inpatient care have been conducted so far.

Variations of cortisol, fatigue and sleep disturbances in sound engineers: effect of job task and fast backward-rotating shifts.

The aim was to study the effect of job task and fast backward-rotating shifts on the time-of-day variations of cortisol, fatigue, and sleep disturbances in broadcasting sound engineers. The concentration of saliva cortisol and ratings of stress, sleepiness, and fatigue were followed at 3-hour intervals during the fast backward-rotating shifts in 26 sound engineers: 14 subjects from control rooms, aged 45.1 +/- 7.

Prevalence of obesity and overweight among urban adults in Bulgaria.

Objective: The prevalence of obesity is increasing in transitional countries, but extensive data on some countries, such as Bulgaria, are still lacking. Therefore, the objective of the present study was to estimate the prevalence of overweight and obesity, relative to gender and income, among adults in Sofia, Bulgaria.

Design: Cross-sectional survey to collect data on diet, health, BMI and income using a brief questionnaire on diet and income.

Blood pressure and serum lipids in industrial workers under intense noise and a hot environment.

The aim of the study was to follow the rate of high blood pressure and dyslipidemia in industrial workers in relation to experience under intense noise and a hot environment. We studied 545 male industrial workers comprising 271 subjects working under intense noise (86 to 92 dba), 159 subjects exposed to heat [wet bulb globe temperature of 35.4 degrees C (28.

Psychophysiological assessment of stress and screening of health risk in peacekeeping operations.

Medical surveillance for military personnel participating in peacekeeping missions (PKMs) is required to define the effect of stress on health status. The aim of this study was to determine the effect of stress on the autonomic cardiovascular control and health risk of 72 Bulgarian peacekeepers participating in a PKM in Kosovo. The assessment of psychophysiological stress and determination of stress characteristics were implemented with analysis of heart rate variability and personal interviews.

Blood pressure response to exercise test and serum lipids in normotensive men with positive family history of hypertension.

The aim of the study was to follow the arterial blood pressure response to exercise test and serum lipids in middle-aged normotensive men with family history (FH) of arterial hypertension. 152 normotensive men, divided into two groups: I group--92 men without FH for arterial hypertension and II group--60 men with family history for arterial hypertension were investigated. The response of blood pressure to exercise test on bicycle ergometer with progressively increasing workload up to 100 W was followed up.

Economic transition and household food consumption: a study of Bulgaria from 1985 to 2002.

Major economic transitions typically entail changes in the availability of and purchasing power for different types of foods leading to long-term changes in the composition of the diet. Bulgaria, a former Eastern Bloc country, underwent a difficult and protracted transition from a centralized to market economy with acute economic crises and a much slower recovery of income levels than in Poland, the Czech Republic, and Hungary. Using annual data from the Bulgarian National Household Survey, we study changes in the reported consumption of major foods (excluding alcoholic drinks) and their constituent macronutrients from 1985 to 2002, examining also the differences in dietary patterns between the period prior to and following the transition.

Increased blood pressure in adult offspring of families with Balkan endemic nephropathy: a prospective study.

Background: Previous studies have linked smaller kidney dimensions to increased blood pressure. However, patients with Balkan Endemic Nephropathy (BEN), whose kidneys shrink during the course of the disease, do not manifest increased blood pressure. The authors evaluated the relationship between kidney cortex width, kidney length, and blood pressure in the offspring of BEN patients and controls.

Dyslipidemia in industrial workers in hot environments.

The aim of the study was to follow the rate and manifestation of dyslipidemia in industrial workers exposed to heat. One hundred and two male industrial workers exposed to heat and a control group of 102 male workers were studied. The microclimate components were followed and Wet Bulb Globe Temperature (WBGT) was calculated.

Cardiovascular risk in operators under radiofrequency electromagnetic radiation.

The aim of the study was to assess the long-term effects of radiofrequency electromagnetic radiation (EMR) on the cardiovascular system. Two groups of exposed operators (49 broadcasting (BC) station and 61 TV station operators) and a control group of 110 radiorelay station operators, matched by sex and age, with similar job characteristics except for the radiofrequency EMR were studied. The EMR exposure was assessed and the time-weighted average (TWA) was calculated.

Clinical markers in adult offspring of families with and without Balkan Endemic Nephropathy.

Balkan Endemic Nephropathy (BEN) is a kidney disease that progresses slowly. Only a few studies have investigated renal clinical markers in offspring of BEN families before the onset of the disease. This project aimed to determine whether kidney function and structure are altered in BEN offspring compared with non-BEN offspring.

Variations of melatonin and stress hormones under extended shifts and radiofrequency electromagnetic radiation.

We studied the time-of-day variations in urinary levels of 6-sulphatoxy-melatonin and three stress hormones in operators working fast-rotating extended shifts under radiofrequency electromagnetic radiation (EMR). The excretion rate of the hormones was monitored by radioimmunoassay and spectrofluorimetry at 4-hour intervals in a group of 36 male operators comprising 12 broadcasting station operators, 12 TV station operators, and a control group of 12 satellite station operators. Measuring the time-weighted average (TWA) of EMR exposure revealed a high-level of exposure in broadcasting station operators (TWAmean= 3.

Specific immune responses in workers exposed to benzene.

Unlabelled: The aim of this study was to elaborate a method for detection of specific IgG antibodies (Abs) to the haptenes p-benzoquinone (p-BQ) and hydroquinone (HQ) for assessment of specific humoral immune responses. Plasma and urine, collected from petrochemical plant workers have been analyzed. The workers were divided into three professional groups in ascending order of benzene exposure.