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PubMed1994

International migrations. A framework for directing research.

Current, large-scale, cross-cultural migrations offer promising research targets for the study of human adaptations. The opportunities for such research, however, remain substantially unused in the mainstream of psychology. The purpose here is to provide a framework encompassing components of the migration experience to aid such research. Contextual factors in the sending and receiving societies impinge on the components of the migration experience: social networks, socioeconomic status, and culture. The components, treated as intertwining transitional experiences in migration, should be juxtaposed in research to examine their effects. Gender and age mediate the effects. The framework aims to benefit research that implicates, directly or heuristically, the experiences of persons exposed to rapid sociocultural change and the consequences of such changes in their lives.

Acculturation↗
PubMedDate not supplied

Internal migration, coffee drinking, and nonfatal myocardial infarction in Italy.

We conducted a hospital-based case-control study of 153 patients who had been recently diagnosed with myocardial infarction; there were 157 hospital controls. All subjects were 35-70-y-old males who lived in the province of Torino (northern Italy). These individuals were nonsmokers or had quit smoking for at least 6 mo. A protective role of migration from southern Italy was found (age-adjusted odds ratio for northern versus southern origin = 1.82, 95% confidence interval = 1.0, 3.3). Although fat consumption differed greatly between those born in northern Italy and those in southern Italy (i.e., the former used mainly butter and the latter used mainly olive oil during their early lives), it did not explain the migration effect. A family history of myocardial infarction increased the risk of a myocardial infarction (odds ratio = 2.4, 95% confidence interval = 1.1, 4.9). Moderate coffee consumption also increased the risk and was not explained by the known coronary risk factors. Relative risks were up to 4 among both nonsmokers and exsmokers who drank more than 4 cups of coffee each day. We controlled for coffee drinking and found that the association with southern origin appeared strengthened.

Adult↗
PubMed1989

Risk of breast cancer, diet and internal migrations in northern Italy.

The protective effect of birth in southern Italy as opposed to other regions was evaluated in a population-based case-control study of diet and breast cancer among residents in the province of Vercelli. Cases were 250 women with breast cancer diagnosed during 1983-1984 and controls 499 women randomly selected from the general population. The crude relative risk of breast cancer for women born in the south was 0.76 (95% confidence interval, 0.43-1.3). After adjustment for dietary and other potential confounders in multivariate analyses, the protective effect of place of birth disappeared (RR 1.0; 95% CI, 0.57-1.9). The study indicates that north-south differences in the incidence of breast cancer in Italy may in large part be attributed to different dietary habits.

Adult↗
PubMed2004

The limits to cumulative causation: international migration from Mexican urban areas.

We present theoretical arguments and empirical research to suggest that the principal mechanisms of cumulative causation do not function in large urban settings. Using data from the Mexican Migration Project, we found evidence of cumulative causation in small cities, rural towns and villages, but not in large urban areas. With event-history models, we found little positive effect of community-level social capital and a strong deterrent effect of urban labor markets on the likelihood of first and later U.S. trips for residents of urban areas in Mexico, suggesting that the social process of migration from urban areas is distinct from that in the more widely studied rural migrant-sending communities of Mexico.

Causality↗
PubMed2006

Internal migration and contraceptive knowledge and use in Guatemala.

CONTEXT: Levels of modern contraceptive knowledge and use among people living in rural areas of Guatemala differ substantially from those of people living in urban areas. Understanding the pace and extent of rural-to-urban migrants' adoption of urban contraceptive practices is important in determining if there is a strong need for migrant-focused reproductive health programs. METHODS: Bivariate and multivariate analyses of data on 971 married male and female respondents in the 1999 Guatemalan Migration and Reproductive Health Survey were used to examine how migration status and duration of residence in an urban area are associated with knowledge of modern contraceptive methods and current contraceptive use. RESULTS: Migrants' contraceptive knowledge was positively associated with the number of years they had lived in an urban area. Mayan migrants in Guatemala City did not accumulate contraceptive knowledge at the same rate as non-Mayan migrants, perhaps due to cultural and linguistic barriers to obtaining knowledge of and access to contraceptives. Rural-to-urban migrants eventually achieve a level of modern contraceptive use slightly below that of urban nonmigrants, with the level of contraceptive knowledge being an important factor associated with use of modern methods. CONCLUSIONS: Migrants possess limited knowledge of modern contraceptive methods and, therefore, may experience unmet need for contraception or may have a limited choice of modern contraceptive methods during their first years in an urban destination. Programs designed to raise contraceptive awareness and use should target recent migrants--particularly indigenous Mayans--in urban areas.

Adolescent↗
PubMed1998

International migration destination forecast concerning the region "Lazio.".

Artificial Neural Networks (ANN) have been applied to different kinds of problems, when it was necessary to simulate and forecast how nonlinear dynamic complex systems worked since the mid 1980's. Currently, ANNs are proposed either as a substitute technique for database analysis or alternating with more traditional classical statistical analysis. This article presents the results of a statistical and a Neural Network analysis, applied to a sociological database in order to systematically explore how these models work, their applications, and both their strong and weak points.

Artificial Intelligence↗
PubMed1975

Volume, characteristics and consequences of internal migration in Colombia.

More than one-third of the Colombian population can be classified as migrants. The prevailing direction of movements is urbanwards, yet it is significant that better than a third of all movements are to rural destinations. Nationwide comparisons of migrants and residents on demographic characteristics would indicate that all streams are selective of the younger and unmarried population, with women predominating in urbanwards movements and men in those to rural areas. However, when compared in terms of socioeconomic characteristics, migrants are more sharply differentiated among themselves than they are from the resident population at each of their respective destinations. Within the migrant population, a natural funneling of the more able migrants to the largest centers suggests itself. Migrants have consistently higher activity rates than the remainder of the population and, in the case of men at least, appear capable of competing for jobs on an equal basis with residents at their respective destinations. Female migrants, however, are consistently overrepresented in lower-status activities, particularly in domestic services.

Adolescent↗
PubMed2002

High rates of tuberculosis in end-stage renal failure: the impact of international migration.

We studied a cohort of patients requiring renal dialysis who had migrated to the United Kingdom from tuberculosis (TB)-endemic countries and found extremely high rates of TB (1,187 cases per 100,000 per year), partly associated with end-stage diabetic renal disease. We recommend enhanced vigilance and screening of such patients, both to reduce illness and death and to prevent nosocomial spread of TB among susceptible persons.

Cohort Studies↗