ISSN 1392-0138
ISSN 2029-4174 (online)
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2009 m. Nr. 1-2
Intermediation of behavioural and biological risk factors in relation between educational level and mortality among middle-aged Kaunas population
Regina RĖKLAITIENĖ, Miglė BACEVIČIENĖ, Abdonas TAMOŠIŪNAS, Dalia VIRVIČIŪTĖ
Background. Educational differences have been assessed as explanations for health behaviour
and all-cause and CVD mortality. In Lithuania, in the years 2000–2007, mortality
increased from 1406 to 1620 deaths / 100000 / year for men and from 654 to 744
deaths / 100000 / year for women (1). Health behaviour may have a potential role in explaining
the relation between risk factors and education.
The objective of the study was to examine the extent to which health behaviour and biological
risk factors can account for relative differences in all-cause and CVD mortality by educational
level among middle-aged population.
Materials and methods. In 1983–1992, three independent surveys were carried out in random
samples of men and women aged 35–64, involving 5403 persons. The mean response rate
was 65.1%. Behavioural and biological risk factors were defined within the framework of the
WHO MONICA study. A total of 1320 individuals died from all causes and 654 from CVD. The
Cox proportional hazards model was used to evaluate the risk of all-cause and CVD mortality.
Results. The prognostic value of behavioural factors (risk ratio, RR) in the low-educated
group as compared with high for mortality from all causes was RR = 1.36 (95% CI, 1.16–1.59)
and from CVD RR = 1.25 (95% CI, 1.35–2.00). The risk of biological factors and all-causes mortality
in the low-educated group as compared with high was assessed as RR = 1.54 (95% CI,
1.30–1.83) and from CVD as RR = 1.42 (95% CI, 1.12–1.81).
Conclusions. Mortality from all causes and CVD among the middle-aged population was
higher in the low-educates group. The population strategy in the low-educated group should be
encouraged to reduce the behavioural and biological risk factors.
Keywords: middle-aged population, biological risk factors, behavioural risk factors
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