Prognosis of acute coronary events is worse in patients living alone: the FINAMI myocardial infarction register.

BACKGROUND: Single living has been associated with a worse prognosis of acute coronary syndrome (ACS). We aimed to study the relation of sociodemographic characteristics to the morbidity, mortality, and case fatality (CF) of ACS in a large population-based ACS register. METHODS: The population-based FINAMI myocardial infarction register recorded 15,330 cases of ACS among persons aged 35-99 years in Finland in 1993-2002. Record linkage with the files of Statistics Finland provided information on sociodemographic characteristics (marital status, household size). RESULTS: ACS incidence and 28-day mortality rate were higher in unmarried men and women in all age groups. The prehospital CF of incident ACS was higher in single living and/or unmarried 35-64-year-old people. The 28-day CF was 26% (95% confidence interval, CI, 24-29%) in married men, 42% (95% CI 37-47%) in men who had previously been married, and 51% (95% CI 46-57%) in never-married men. Among women, the corresponding figures were 20% (95% CI 15-24%), 32% (95% CI 25-39%), and 43% (95% CI 31-56%). Most of these CF differences were apparent already at the prehospital phase. The only difference in treatment was that middle-aged men living alone or unmarried received thrombolysis less often. The disparities in ACS morbidity and mortality by marital status tended to widen during the study period. CONCLUSIONS: Single living and/or being unmarried increases the risk of having a heart attack and worsens its prognosis both in men and women regardless of age. Most of the excess mortality appears already before the hospital admission and seems not to be related to differences in treatment of ACS.

Aging of the population may not lead to an increase in the numbers of acute coronary events: a community surveillance study and modelled forecast of the future.

OBJECTIVE: To examine the incidence, mortality and case fatality of acute coronary syndrome (ACS) in Finland during 1993-2007 and to create forecasts of the absolute numbers of ACS cases in the future, taking into account the aging of the population. DESIGN: Community surveillance study and modelled forecasts of the future. SETTING AND METHODS: Two sets of population-based coronary event register data from Finland (FINAMI and the National Cardiovascular Disease Register (CVDR)). Bayesian age-period-cohort (APC) modelling. PARTICIPANTS: 24 905 observed ACS events in the FINAMI register and 364 137 in CVDR. MAIN OUTCOME MEASURES: Observed trends of ACS events during 1993-2007, forecasted numbers of ACS cases, and the prevalence of ACS survivors until the year 2050. RESULTS: In the FINAMI register, the average annual declines in age-standardised incidence of ACS were 1.6% (p<0.001) in men and 1.8% (p<0.001) in women. For 28-day case fatality of incident ACS, the average annual declines were 4.1% (p<0.001) in men and 6.7% (p<0.001) in women. Findings in the country-wide CVDR data were consistent with the FINAMI register. The APC model, based on the CVDR data, suggested that both the absolute numbers of ACS events and the prevalence of ACS survivors reached their peak in Finland around 1990, have declined since then, and very likely will continue to decline until 2050. CONCLUSIONS: The ACS event rates and absolute numbers of cases have declined steeply in Finland. The declining trends are likely to continue in the future despite the aging of the population.

Socioeconomic inequalities in the morbidity and mortality of acute coronary events in Finland: 1988 to 2002.

PURPOSE: To examine the changes in socioeconomic disparities in the incidence of coronary heart disease (CHD) and mortality in Finland and to analyze the effects of the severe economic recession of the early 1990s on these disparities. METHODS: The population-based FINAMI Myocardial Infarction (MI) register recorded all suspected MI events among men and women ages 35 to 99 years in four geographical areas of Finland. Record linkage with the files of Statistics Finland provided us with detailed information on the indicators of socioeconomic status (SES; income, education, and profession). Rates were expressed per 100,000 inhabitants of each socioeconomic group per year and age-standardized to the European standard population. Poisson regression was used for analyzing rate ratios and time trends of coronary events in different socioeconomic groups. RESULTS: The mortality rate ratio of coronary events among 35- to 64 year-old men was 5.21 (95% confidence interval, 4.23-6.41) when the lowest income sixth to the highest income sixth were compared. Among women, the respective rate ratio was 11.13 (5.77-21.45). Significant differences in the incidence and 28-day mortality by SES were seen also in the older age groups. Some socioeconomic differences were found in the proportions of patients receiving thrombolysis or undergoing early revascularization. No substantial changes were observed in inequalities between the socioeconomic groups during the study period. CONCLUSIONS: The excess CHD morbidity and mortality among persons with lower SES is still considerable in Finland, but the economic recession did not widen the differences.

A new definition for myocardial infarction: what difference does it make?

AIMS: As a response to changing diagnostic tools of myocardial infarction (MI), new case definitions for acute coronary events were published in 2003 as the American Heart Association Scientific Statement. We assessed the new definition in hospitalized patients in a large population-based MI register study. METHODS AND RESULTS: We identified all suspected acute coronary syndromes with data either on troponin T or on troponin I and at least one of the enzymatic markers of myocardial injury (n=6104). The 2003 definition with the use of troponins identified 83% more definite MIs than the WHO MONICA definition using cardiac enzymes. The additional patients were older, had more often diabetes, and received less often thrombolysis and revascularization than those having MI by both definitions. Adjusting for age, sex, study area, and study year, the additional patients with their first MI aged 25-74 had a higher risk of cardiovascular death within 1 year than patients having definite MI by both definitions (hazard ratio 1.6, 95% CI 1.1-2.2). CONCLUSION: The changing diagnostic criteria present a considerable challenge for the assessment of long-term trends in MI events in the community as well as for longitudinal studies of the natural history of MI. The 2003 definition, when applied using troponins, identified a sizable new group of MI patients, among persons with suspected acute coronary syndrome, at high risk of a recurrent event.

The validity of the Finnish Hospital Discharge Register and Causes of Death Register data on coronary heart disease.

BACKGROUND AND DESIGN: The recent introduction of sensitive markers of myocardial injury is likely to affect the epidemiology of coronary heart disease (CHD). The American Heart Association together with other societies and research agencies have recently published a new definition on acute CHD to improve consistency in epidemiological and clinical studies (referred here as the '2003 definition'). METHODS: In this study we compare the data on CHD events in the Finnish National Hospital Discharge Register (HDR) and the Causes of Death Register (CDR) with the population-based myocardial infarction (MI) register, FINMONICA/FINAMI. The FINMONICA/FINAMI events were classified according to the 2003 definition. The relevant International Classification of Diseases (ICD) codes from the HDR and CDR were used. RESULTS: Using the 2003 definition as the reference, the overall sensitivity of the ICD codes for MI in the combined HDR and CDR was 83% and the positive predictive value (PPV) was 90%. When the ICD codes for unstable angina were added to the analyses, the sensitivity improved to 85% and the PPV declined to 83%. In the age group 35-74 the sensitivity of the MI codes improved over time, in men from 64% in 1988-1992 to 81% in 1998-2002, and in women from 61 to 78%, respectively. The oldest age group, 75 years or older, had sensitivity and PPV values comparable to those of the younger. CONCLUSION: Diagnoses of fatal and non-fatal CHD events in the Finnish HDR and Causes of Death register were reasonably valid indicators for hard CHD events when compared with the FINMONICA/FINAMI register data.