Increased psychosocial strain in Lithuanian versus Swedish men: the LiVicordia study.

OBJECTIVE: Coronary heart disease (CHD) mortality is four times higher in 50-year-old Lithuanian men than in 50-year-old Swedish men. The difference cannot be explained by standard risk factors. The objective of this study was to examine differences in psychosocial risk factors for CHD in the two countries. METHODS: The LiVicordia study is a cross-sectional survey comparing 150 randomly selected 50-year-old men in each of the two cities: Vilnius, Lithuania, and Linköping, Sweden. As part of the study, a broad range of psychosocial characteristics, known to predict CHD, were investigated. RESULTS: In the men from Vilnius compared with those from Linköping, we found a cluster of psychosocial risk factors for CHD; higher job strain (p <.01), lower social support at work, lower emotional support, and lower social integration (p values <.001). Vilnius men also showed lower coping, self-esteem, and sense of coherence (p values < .001), higher vital exhaustion, and depression (p values < .001). Quality of life and perceived health were lower and expectations of ill health within 5 to 10 years were higher in Vilnius men (p values < .001). Correlations between measurements on traditional and psychosocial risk factors were few and weak. CONCLUSIONS: The Vilnius men, representing the population with a four-fold higher CHD mortality, had unfavorable characteristics on a cluster of psychosocial risk factors for CHD in comparison with the Linköping men. We suggest that this finding may provide a basis for possible new explanations of the differences in CHD mortality between Lithuania and Sweden.

Attenuated cortisol response to a standardized stress test in Lithuanian versus Swedish men: the LiVicordia study.

Cardiovascular mortality rates of middle-aged men are 4 times higher in Lithuania than in Sweden The difference is not explained by standard risk factors, but our previous findings of pronounced psychosocial stress in Lithuanian men offer a possible explanation. We investigated cortisol and cardiovascular reactivity to a standardized laboratory stress test in population-based random samples of 50-year-old men from Vilnius, Lithuania and Linköping, Sweden. Repeated measures analysis of variance showed that cortisol responses differed between cities (p's < .0001). Mean change of serum cortisol from baseline to 30 min was 18.1 and 88.4 nmol/1 for Vilnius and Linkoping men, respectively (p < .001). In a multivariate analysis, a low peak cortisol response was significantly related to high baseline cortisol, current smoking, and vital exhaustion. The findings suggest a physiological mechanism of chronic psychosocial stress, which may contribute to increased risk for cardiovascular death.

Antioxidant state and mortality from coronary heart disease in Lithuanian and Swedish men: concomitant cross sectional study of men aged 50.

OBJECTIVE: To investigate possible risk factors and mechanisms behind the four times higher and diverging mortality from coronary heart disease in Lithuanian compared with Swedish middle aged men. DESIGN: Concomitant cross sectional comparison of randomly selected 50 year old men without serious acute or chronic disease. Methods and equipment were identical or highly standardised between the centres. SETTING: Linköping (Sweden) and Vilnius (Lithuania). SUBJECTS: 101 and 109 men aged 50 in Linköping and Vilnius respectively. MAIN OUTCOME MEASURES: Anthropometric data, blood pressure, smoking, plasma lipid and lipoprotein concentrations, susceptibility of low density lipoprotein to oxidation, and plasma concentrations of fat soluble antioxidant vitamins. RESULTS: Systolic blood pressure was higher (141 v 133 mm Hg, P < 0.01), smoking habits were similar, and plasma total cholesterol (5.10 v 5.49 mmol/l, P < 0.01) and low density lipoprotein cholesterol (3.30 v 3.68 mmol/l, P < 0.01) lower in men from Vilnius compared with those from Linköping. Triglyceride, high density lipoprotein cholesterol, and Lp(a) lipoprotein concentrations did not differ between the two groups. The resistance of low density lipoprotein to oxidation was lower in the men from Vilnius; lag phase was 67.6 v 79.5 minutes (P < 0.001). Also lower in the men from Vilnius were mean plasma concentrations of lipid soluble antioxidant vitamins (beta carotene 377 v 510 nmol/l, P < 0.01; lycopene 327 v 615 nmol/l, P < 0.001; and lipid adjusted gamma tocopherol 0.25 v 0.46 mumol/mmol, P < 0.001. alpha Tocopherol concentration did not differ). Regression analysis showed that the lag phase was still significantly shorter by 10 minutes in men from Vilnius when the influence of other known factors was taken into account. CONCLUSIONS: The high mortality from coronary heart disease in Lithuania is not caused by traditional risk factors alone. Mechanisms related to antioxidant state may be important.