This dissertation aims to describe social inequalities in self-rated health in an integrated framework of gender, social class and immigration, and to identify the main intermediary factors and health problems that contribute to these inequalities. Three cross-sectional studies were performed with data from surveys of the general population residing in Catalonia and Spain in 2006. Migration from poor regions of Spain to Catalonia emerged as a health inequality dimension in addition to and interaction with gender and social class, highlighting the transitory nature of the ‘healthy immigrant effect’ partially observed in foreign immigrants. Material and economic resources made major contributions to all three types of health inequalities: individual income made the greatest contribution to gender inequalities; household material assets and financial difficulties to migration-related inequalities; and both to social class inequalities. Poorer self-rated health of women was showed to be not an issue of perception but a precise reflection of the higher burden of chronic conditions they suffered compared to men, such as musculoskeletal, mental and other pain disorders, which could be targets for a health system responsive to gender inequalities. Intersections between axes of inequality created complex social locations with unique consequences on health.

The general objective of this dissertation is to study breast cancer screening and specifically social inequalities by social class and country of origin and its relationship with decreasing mortality. Therefore, four different studies have been done: three with quantitative methodology and one with qualitative. According to the quasi-experimental study, breast cancer mortality decreased in Barcelona before the introduction of the population screening program, but this reduction is more marked after its introduction. According to data from the Spanish National Health Survey in 2006, there are inequalities in the rate of breast cancer screening according to country of origin and social class. According to two studies conducted in Barcelona, immigrant women from low-income countries are less aware, and hence do less, early detection practices, as they have other priorities and perceive more barriers and taboos. Chinese women are the immigrants who present more differences with native women, followed by Maghribian and Philippine women. Place of origin, social class and migration process are key factors in preventive practices. In conclusion, it is necessary to encourage access to preventive screening practices for all women and also to undertake specific actions directed at the most vulnerable groups, taking into account any socio-cultural factors that influence the use of preventive practices. / L’objectiu general d’aquesta tesi és estudiar el cribratge de càncer de mama i en concret les desigualtats socials per classe social i país d’origen, així com la seva relació amb la disminució de la mortalitat. En conseqüència, s’han realitzat quatre estudis diferents: tres de metodologia quantitativa i un de qualitativa. Segons l’estudi quasi-experimental, la mortalitat per càncer de mama a Barcelona disminueix des d’abans de la introducció del programa poblacional de cribatge, però aquesta reducció és més accentuada desprès de la seva introducció. En base a l’Enquesta Nacional de Salut de l’Estat Espanyol de l’any 2006, existeixen desigualtats en la realització de mamografies periòdiques segons país d’origen i classe social. Segons els dos estudis realitzats a Barcelona, les dones immigrades procedents de països de renda baixa coneixen i realitzen menys les pràctiques de detecció precoç, ja que tenen altres prioritats i perceben més barreres i tabús. Les dones xineses són les que presenten més diferències amb les dones autòctones, seguides de les magribines i les filipines. El lloc d’origen, la classe social i el procés migratori són factors claus en les practiques preventives. En conclusió, és necessari afavorir l’accés a les pràctiques preventives a totes les dones i també realitzar accions específiques dirigides als grups més vulnerables sense deixar de tenir en compte els factors socioculturals que influeixen en les pràctiques preventives de les dones.