Alarmingly high occurrence and case fatality of acute coronary heart disease events in Estonia: results from the Tallinn AMI register 1991-94

Trends in incidence, attack rate, and mortality of acute myocardial infarction in Estonia: the Tallinn AMI Registry 1991-2005

OBJECTIVES

Coronary event rates have declined in most Western countries during the past decades, but the trends in the former Eastern block have not been established. The purpose of the present study was to examine the trends in acute coronary events during 1991-2005 in Tallinn, Estonia.

DESIGN

The Tallinn Acute Myocardial Infarction (AMI) Registry recorded all AMI events among the residents of Tallinn, Estonia, aged 35-64 years during two time periods, 1991-1997 and 2003-2005.

RESULTS

Altogether, 4889 AMI events were recorded. The average age-standardized incidence and attack rate of AMI events were lower in the second than in the first registration period in both sexes. When analyzed annually, the AMI event rates increased from 1991 to 1993 in both sexes. Thereafter from 1993 to 2005 the incidence of first AMI events declined significantly, 2.7%/year in men and 5.0%/year in women (P < 0.001 for both). Also the other event types, except the attack rate among men, tended to decline after 1993.

CONCLUSIONS

The year 1993 denoted a significant turning-point in the trends in AMI events in Tallinn, Estonia. After that especially the incidence of first AMI started to decline, and the declines have continued until 2005.

Achieving lipid goals with rosuvastatin compared with simvastatin in high risk patients in real clinical practice: a randomized, open-label, parallel-group, multi-center study: the DISCOVERY-Beta study

The aim of this multi-center, open-label, randomized, parallel-group trial was to compare the efficacy of rosuvastatin with that of simvastatin in achieving the 1998 European Atherosclerosis Society (EAS) lipid treatment goals. 504 patients (> or =18 years) with primary hypercholesterolemia and a 10-year cardiovascular (CV) risk >20% or history of coronary heart disease (CHD) or other established atherosclerotic disease were randomized in a 2:1 ratio to receive rosuvastatin 10 mg or simvastatin 20 mg once daily for 12 weeks. A significantly higher proportion of patients achieved 1998 EAS low-density lipoprotein cholesterol (LDL-C) goal after 12 weeks of treatment with rosuvastatin 10 mg compared to simvastatin 20 mg (64 vs 51.5%, p < 0.01). Similarly, significantly more patients achieved the 1998 EAS total cholesterol (TC) goal and the 2003 EAS LDL-C and TC goals (p < 0.001) with rosuvastatin 10 mg compared with simvastatin 20 mg. The incidence of adverse events and the proportion of patients who discontinued study treatment were similar between treatment groups. In conclusion, in the DISCOVERY-Beta Study in patients with primary hypercholesterolemia greater proportion of patients in the rosuvastatin 10 mg group achieved the EAS LDL-C treatment goal compared with the simvastatin 20 mg group. Drug tolerability was similar across both treatment groups.

Determinants of and inequalities in self-perceived health in Ukraine

Ukraine is the second most populous of the former Soviet Republics and since transition its economy has fared even more poorly than Russia. Although the impact of the collapse of the former Soviet Union on health in Russia has been investigated, little is known of its impact in other post-Soviet republics. We report a cross-sectional study undertaken in Ukraine in March 2000. A multi-stage random sampling technique was used and 1600 interviews completed (72% response rate) with a representative national sample of Ukrainian adults. We investigated socioeconomic and psychosocial determinants of self-perceived health, which has been shown to be a valid and reliable measure of overall health and predictive of mortality. Odds ratios for less than good physical health were calculated using logistic regression. The self-rated health of Ukrainians was poor, 25% of men and 43% of women rated their health as poor or very poor. This is worse than levels recorded in Russia and considerably worse than levels seen in western Europe. Marked gender, geographical and socioeconomic inequalities in health were recorded. Women are at increased risk of poor self-rated health compared with men (OR 3.58, 2.50-5.14) as are women living in villages compared with those in cities (OR 3.24, 1.30-8.07). Socioeconomic factors including poor material situation (OR 1.64, 1.01-2.67), and psychosocial factors including low control over life (OR 1.89, 1.15-3.11) were identified as independent health determinants. Control over life was found to account for the negative impact of low social position on health. Good family relations protected against poor health. The findings suggest that a decrease in control, arising from an increasingly uncertain political and economic environment, a reduction in material wealth and the stress of change may all have contributed to the decline in life expectancy seen with transition.

Risk factors for coronary heart disease in 55- and 35-year-old men and women in Sweden and Estonia

OBJECTIVE

To illustrate the geographical West-to-East division of coronary heart disease (CHD) by comparing a population from Sweden, that represents a Western country to a population from Estonia, that represents an Eastern country. Estonia has an approximately 2-4-fold higher CHD prevalence for 55-year-old women and men, respectively, than Sweden.

DESIGN

Randomized screening of 35- and 55-year-old men and women in Sollentuna county, Sweden and Tartu county, Estonia. Eight hundred subjects, 100 from each cohort, were invited to participate in the study, 272 Swedes and 277 Estonians participated.

SETTING

Preventive cardiology, administered by a primary health care centre at the Karolinska Hospital, Sweden and a cardiology centre at Tartu University Hospital, Estonia.

MAIN OUTCOME MEASURES

The CHD risk factors (smoking, blood pressure, concentrations of lipoproteins, fibrinogen, and glucose) and certain environmental factors and attitudes related to CHD risk by questionnaires (fat-type and alcohol ingestion, self-assessed rating of CHD susceptibility).

RESULTS

Of the 55-year-old men, 57% smoked in Estonia and 20% smoked in Sweden. Similar, although less pronounced differences showing higher smoking prevalence, were seen for 35-year-old Estonian men and women, whilst for 55-year-old women, less than 20% smoked in either country. Estonian 55-year-old women had lower HDL cholesterol and higher LDL cholesterol serum concentrations than Swedish 55-year-old women. Estonians reportedly ate food containing more saturated fats than Swedes, as indicated by the scale-score questionnaire. Estonians, relative to Swedes, rated their chance of developing CHD higher, and paradoxically, Estonians did to a much lesser degree believe that life style influences the risk of developing CHD.

CONCLUSIONS

Elevated smoking prevalence is a striking difference between the Estonian and Swedish populations likely to explain the much higher CHD prevalence in Estonian men. The lower HDL cholesterol and higher LDL cholesterol in Estonian 55-year-old women may explain the higher CHD prevalence in Estonian women. Furthermore, the SWESTONIA CHD study (i.e. comparison between Sweden and Estonia) shows several environmental differences between the countries populations related to fat content in food, alcohol drinking patterns, and views on CHD risk and the importance of lifestyle intervention, that could contribute to the higher CHD prevalence in Estonia.

Changes in life expectancy in Russia in the mid-1990s

BACKGROUND

Between 1987 and 1994, life expectancy in Russia declined substantially. Between 1994 and 1998, this trend reversed, and mortality rates returned to those of the early 1980s. Although the decline in life expectancy has been examined previously, much less is known about the subsequent improvement in mortality rates. We used recently published cause-specific mortality data up to 1998 to clarify this issue.

METHODS

Changes in cause-specific death rates at ages 15-74 years were examined. Rates for 1998 were compared with those for 1994 (the year of lowest life expectancy) and for 1991 (the year the Soviet Union broke up).

FINDINGS

Death rates among children fell steadily throughout the 1990s, and those in elderly people changed little. The reduction in mortality since 1994 was mainly due to a decrease in the death rate among middle-aged adults, which had increased until 1994. Deaths among those aged 15-30 years, which rose during 1991-94, remained high. Some causes of death, such as stomach cancer and road-traffic accidents, declined throughout the 1990s, whereas others, such as breast and prostate cancers and tuberculosis, increased. The decline in mortality since 1994 was, however, mainly due to a reduction in the rate of deaths from a group of causes associated with alcohol consumption.

INTERPRETATION

The changing life expectancy in Russia is a consequence of a complex pattern of trends in different causes of death, some of which have their origins long in the past, and others that result from contemporary circumstances. This study provides further support for the view that alcohol has played an important part in the fluctuations in life expectancy in Russia in the 1990s, although there remains a need for a much better understanding of the factors underlying these continuing changes.

International trends in mortality from stroke, 1968 to 1994

BACKGROUND AND PURPOSE

The World Health Organization data bank is an invaluable source of information for international comparison of mortality trends. We present rates and trends in mortality from stroke up to 1994, with a particular emphasis on the last 10-year period. Data are presented for men and women in 51 industrialized and developing countries from different parts of the world.

METHODS

We included all deaths from cerebrovascular disease for the population aged 35 to 84 years from all the countries in which death certificates were estimated to be available for at least 80% for the period from 1968 to 1994. Age-standardized mortality rates from stroke were calculated for each country for the last available 5 years. Time trends were calculated by using ordinary linear regression and are presented for the entire study period and for 3 separate time periods: 1968 to 1974, 1975 to 1984, and 1985 to 1994. The last 10-year period was further subdivided into 2 parts of 5 years each. We analyzed data separately for men and women and for groups aged 35 to 74 years and 75 to 84 years.

RESULTS

The highest rates at the end of the study period for the population aged 35 to 74 years were observed in eastern Europe and previous Soviet Union countries (309 to 156/100 000 per year among men and 222 to 101/100 000 per year among women), Mauritius (268/100 000 per year among men and 138/100 000 per year among women), and Trinidad and Tobago (185/100 000 per year among men and 134/100 000 per year among women). Relatively low to average rates (<100/100 000 per year among men and <70/100 000 per year among women) were reported for Western Europe, with an exception of Portugal (162/100 000 per year among men and 95/100 000 per year among women). The countries with lowest stroke mortality rates at the end of the study period, such as the United States, Canada, Switzerland, France, and Australia, experienced steep declining trends. However, the slope of the decline was substantially reduced during the last 5 years in these countries. Mortality from stroke increased most in the eastern European countries, especially during the last 5 years. Among other high-risk populations, no change in stroke mortality trends was observed in Mauritius, whereas somewhat declining trends were seen in Trinidad and Tobago.

CONCLUSIONS

We observed large differences in mortality rates from stroke around the world together with a wide variation in mortality trends. A widening gap was observed between 2 groups of nations, those with low and declining stroke mortality rates and those with high and increasing mortality, in particular, between western and eastern Europe. Eastern European countries should initiate actions aiming at the reduction of stroke risk, perhaps by looking at the examples of Japan and Finland and the other countries that have been the most successful in reducing previously very high mortality from stroke.