[Increase in differences in survival according to income per capita in Spain in the last quarter of the twentieth century].
OBJECTIVE
To estimate probability of survival in Spain from 1975 to 1995 according to income per capita quintiles.


METHODS
The 50 provinces in Spain were ordered by income per capita in 1975, 1981, 1985, 1990 and 1995. For each quintile and year we estimated the probability of surviving 75 years from birth and the probability of survival in several age intervals in men and women. Probability was estimated by percentages. Subsequently, we calculated differences in the probability of survival between the highest and the lowest income per capita quintiles.


RESULTS
Differences in the probability of surviving from birth to the age of 75 years increased from 1.3 in 1975 to 3.1 in 1995 in women, whereas in men the increase was from 0.1 in 1975 to 3.7 in 1995.


CONCLUSIONS
In Spain, as in other developed countries, socioeconomic differences in premature mortality increased in the latter decades of the twentieth century.
Departamento de Medicina Preventiva, Salud Pública e Historia de la Ciencia. Universidad Complutense de Madrid. Madrid. España. enriqueregidor@hotmail.com
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D000328:Adult; D000368:Aged; D005260:Female; D006801:Humans; D007182:Income; D008136:Longevity; D008297:Male; D008875:Middle Aged; D009026:Mortality / Q000639:trends*; D013030:Spain / Q000453:epidemiology