Objectives-Firstly, to ascertain whether mortality among workers of the former Spanish Nuclear Energy Board (Junta de Energia Nuclear-JEN) was higher than that for the Spanish population overall; and secondly, if this were so, to ascertain whether this difference was associated with exposure to ionising radiation. Methods-A retrospective follow up of a cohort of 5657 workers was carried out for the period 1954-92. Cohort mortality was compared with that for the Spanish population overall, with standardised mortality ratios (SMRs) adjusted for sex, age, and calendar period. Also, Poisson models were used to analyse mortality from lung cancer in the cohort by level of exposure to ionising radiation. Results-Workers' median and mean cumulative exposures were 4 04 and 11 42 mSv, respectively. Mean annual exposure was 133 mSv. Excess mortality due to bone tumours was found for the cohort as a whole (six deaths observed; SMR 2.95; 95% confidence interval (95% CI) 1-08 to 6.43). Among miners, excess mortality was found for non-malignant respiratory diseases (SMR 2-94; 95% CI 2*27 to 3-75), and for lung cancer bordering on statistical significance (SMR 1 50; 95% CI 0-96 to 2*23; P = 0.055). Relative risks of dying of lung cancer from ionising radiation in the dose quartiles 2, 3, and 4 versus the lowest dose quartile, were 1*00, 164, and 0*94, respectively. Conclusions-Excess mortality from lung cancer was found among JEN miners. Nevertheless, no clear relation was found between mortality from lung cancer and level of exposure to ionising radiation in the JEN cohort. Continued follow up of the cohort is required to confirm excess mortality from bone tumours.
Background and Purpose-This study examines the changes in provincial distribution of cerebrovascular disease (CVD) mortality and its socioeconomic and lifestyle risk factors to identify those factors that have most greatly contributed to the decline in CVD mortality in Spain during the period 1975-1993. Methods-We performed a study using data aggregated at a provincial level. Mortality data were taken from official vital statistics, while data on risk factors were obtained from surveys of representative large Spanish population samples. Correlation and multiple linear regression analyses were performed on percent changes in age-standardized CVD mortality from 1975-1979 to 1989 -1993 and its potential determinants during the period 1964 -1980. Results-CVD mortality was higher in the southern and eastern (Mediterranean coast) provinces in 1975-1979 and again in 1989 -1993. Between these periods there was a 55% decline in CVD mortality, which affected all provinces but was greater in those with a lower CVD mortality (rϭϪ0.31, Pϭ0.03). The 1964 -1980 period witnessed an increase in the intake of most foodstuffs and all types of fats. However, there was a decrease in the consumption of vegetables and legumes and in the proportion of illiteracy among the population older than 45 years. The greatest increase in fruit and fish consumption and the greatest decrease in illiteracy were registered by Spain's northernmost provinces, the same provinces that recorded the greatest decline in CVD mortality. Changes in fruit, wine, and fish intake accounted for 22% of the variation in the decline in CVD mortality. The increase in fruit consumption and decrease in wine consumption showed a statistically significant relationship (PՅ0.04) with the decline in CVD mortality.
Conclusions-The
Moderate consumption of alcohol is associated with the prevalence of heavy drinkers in all regions of Spain. Therefore, promotion of moderate consumption of alcohol in Spain might be associated with a rise in the prevalence of heavy drinkers, those who most frequently suffer the harmful effects of alcohol.
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