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At least 1,117 records · Page 62Linked to original sources
PubMed2002

Differences in factors associated with oncogenic and nononcogenic human papillomavirus infection at the United States-Mexico border.

Previous studies have shown that risk factors for oncogenic (high-risk) and nononcogenic (low-risk) human papillomavirus (HPV) infection differ. To determine the risk factors for oncogenic and nononcogenic HPV infection in women residing along the United States-Mexico border, a cross-sectional study of type-specific HPV prevalence was conducted. Women (N=2246) ages 15-79 years, living in communities on both sides of the United States-Mexico border and attending family planning clinics were recruited. Women were screened for HPV and cytology and were asked to complete a health questionnaire. HPV status was determined by PCR, and HPV genotyping was performed using a reverse line blot hybridization assay (Roche Molecular Systems, Inc., Alameda, CA). Logistic regression analysis was conducted to determine factors independently associated with oncogenic and nononcogenic HPV infection in separate analyses. Similar to previous studies, lifetime number of sexual partners was only associated with oncogenic HPV infection. In contrast, nononcogenic HPV infection appeared to be associated with recent sexual activity, suggesting that nononcogenic infections may be more transient. Results from this study add to the growing literature suggesting that transmission and persistence of HPV differs by oncogenicity.

Adolescent↗
PubMed1981

The rural exodus in Mexico and Mexican migration to the United States.

"During the 1950s, labor conditions in the United States attracted Mexican migrants, mostly from rural areas, in sharply fluctuating patterns of active recruitment, laissez-faire or repatriation. Because [the rural exodus and migration to the United States] have varied simultaneously and because they are interrelated, it has been assumed that the rural exodus in Mexico generally explains the flow of migrants across the border to the United States. This article argues that they must be analyzed instead as two distinct movements. Data presented show that most of the migrants created by the prevailing conditions in Mexican rural villages settle within Mexico and that only specific types of migrants are attracted over the border."

Americas↗
PubMedDate not supplied

[Population and development in Mexico: a synthesis of recent experience].

Changes in the relationship between population factors and the development process in Mexico from 1940 to the present are reviewed. The authors show how the development that occurred up to about 1970 both absorbed and encouraged rapid population growth. They then describe how the emergence of problems concerning this relationship led to the development of a population policy during the 1970s. "The paper then takes up the implementation of that policy and the determinants of the fertility decline that took place afterwards, and closes with a brief review of the implications that demographic considerations have for Mexico's future." (SUMMARY IN ENG)

Americas↗
PubMedDate not supplied

[Mortality in Mexico. Some considerations on rural-urban differentials].

"In this essay, certain aspects related to rural-urban mortality differentials in Mexico are analyzed....[These include] the availability, advantages, and limitations of different sources of information and the disparity of levels and tendencies according to particular indicators of acceptable reliability, especially those deriving from recent demographic surveys conducted in Mexico. The findings confirm an inverse ratio between size of settlement and mortality, and reveal a widening of the differentials over time." (SUMMARY IN ENG)

Americas↗
PubMedDate not supplied

[Mexico: nuptiality differentials by region and size of settlement].

"This article presents a description of the patterns of marriage to be found in the different regions of Mexico based on an analysis of the National Demographic Survey...conducted in 1982.... An assessment was made of first marriages in terms of their timing, intensity, average age at marriage and nature of the union according to the size of the settlement. Then a similar analysis was effected for each region. In conclusion, it is pointed out that in Mexico two patterns of nuptiality coexist: one which is characterized as 'traditional' and the other which has been called the 'Gulf-Caribbean' pattern because in some respects it is similar to the patterns found in the Caribbean region." (SUMMARY IN ENG)

Americas↗
PubMedDate not supplied

[From rings to segregation. Mexico City, 1950-1987].

The author discusses different methods of urban analysis, using the example of Mexico City, Mexico. "In this work two outlines are used: a concentric one that reflects the city's expansion and a segregated one that sees the 'different cities' within. We analyze the commercial occupation of central areas and the growth due to the expansion of the periphery from 1950 to 1986. In both processes, the massive expulsion of the inhabitants appears, firstly as an effect and secondly as a cause. This fact serves as an argument to explore certain proposals in a prospective dimension. In the technical [spatial] analysis we generally avoid the design of the city itself. Here we approach some design ideas without forgetting their social dimension." (SUMMARY IN ENG)

Americas↗
PubMed1991

Patterns of domestic life in colonial Mexico: views from the households.

The author proposes new directions for the study of family life in colonial Mexico. "The goal was to present an alternative perspective for discussing patterns of domestic life in colonial Latin America and to illustrate how use of the life-course perspective improves on the more static, conventional Laslett approach.... Statistically based examinations of domestic life-course patterns, when combined with information about the economic, legal, and emotive aspects of families, can bring us closer to understanding social dynamics and everyday life in Mexico's past."

Americas↗
PubMedDate not supplied

[Adjustment of an expologistic function to the evolution of Mexico's total population, 1930-1945].

The author makes the case that none of the mathematical models currently in use for estimating population dynamics can be suitably applied to Mexico's natural growth "due to the fact that the assumptions underlying [their] mathematical representations do not correspond to the observed dynamics of the components of natural growth. The purpose of this article is to adjust a mathematical function to the evolution of Mexico's total population between 1930 and 1985, adequately reproducing the evolution of natality and mortality observed in that period." (SUMMARY IN ENG)

Americas↗
PubMedDate not supplied

[Demographic dynamics of urban growth in Mexico: 1940-1980].

"In this article, the author analyzes the relationship between growth rates and the sizes of cities [in Mexico] to determine what kind of cities are the most dynamic ones in terms of their demographic growth during the 1940-1980 period. [His findings contradict] the widespread belief that in Mexico, as of 1970, there has been a process of 'metropolitanization' and of 'growth of intermediate cities'." He proposes changes to current population policy, which attempts to control urban growth through regulation. (SUMMARY IN ENG)

Americas↗
PubMedDate not supplied

[Migration to Mexico City: a multifaceted process].

"In this paper, the author analyzes the evolution of migration to Mexico City based on information generated by the National Survey on Migration to Urban Areas.... The findings support the hypothesis that there has been a decrease in the intensity of in-migration towards capital. The rural origin of the migrants prevails; the majority of these are young people coming from the states closest to the city, with low levels of schooling. An increase is observed in out-migration from Mexico City to other major cities in the country...." (SUMMARY IN ENG)

Age Factors↗
PubMedDate not supplied

[Economic development and urban spatial distribution in Mexico, 1960-1990].

"This study describes general links between economic development and urbanization in Mexico in the periods from 1960 to 1980 and 1980 to 1990. Changes observed in production structure are compared with the dynamics of urban development, according to the increase in the number of cities, modifications in urbanization levels and increases in absolute urban population size. During the [1980s], there seemed to be a change in Mexico's process of urbanization, characterized by a sudden deceleration and sharp fall in the power of the country's four main metropolitan areas to concentrate large populations as they had done up to 1980." (SUMMARY IN ENG)

Americas↗
PubMed1995

[Restructuring in Mexico and the United States and international migration].

"This article relates some of the new trends in Mexican migration to the United States to the various moments, forms and intensities of restructuring in both countries. It states that the new forms of precarious employment in Mexico have to do not just with the size of migrant flows and migrants' socioeconomic characteristics, but with the responses of host populations. It ends by stating that Mexican migrants will become more and more irritating to middle class Americans if the types of jobs being created in Mexico do not change." (SUMMARY IN ENG AND FRE)

Americas↗
PubMed1997

Mexico-United States labor migration flows.

"International migration from Mexico to the United Sates is viewed very differently depending on from which side of the border this phenomenon is observed and evaluated....[It is] imperative to begin a process of ¿demythifying' migration as a necessary and sufficient condition that would allow both countries to come together within the context of bilateral relations and find ways to act jointly to address the impacts of the issue. Such a demythifying effort must begin with scientific research which can help develop a diagnosis of the costs and benefits that labor migration from Mexico to the United States brings to the two countries."

Americas↗
PubMedDate not supplied

[Household structure as a response to economic adjustments: evidence from urban Mexico in the 1980s].

"This paper presents the results of exploratory efforts to examine the determinants of the structure of households in urban areas of Mexico, focusing on those of women with young children.... The empirical analysis uses two cross-sectional national surveys of Mexico, the 'Encuesta Nacional Demografica' 1982 and the 'Encuesta Nacional de Fecundidad y Salud' 1987...." (SUMMARY IN ENG)

Americas↗
PubMedDate not supplied

[Spatial distribution of population in the metropolitan area of Mexico City, 1950-1990].

"This study explores how the spatial distribution of population in the Metropolitan Area of Mexico City (MAMC) has changed between 1950 and 1990. First of all it presents the structural concepts of this research, and then analyzes the growth and spatial distribution of the MAMC population.... The results of this study indicate that MAMC: (i) continues to decrease in its central areas, (ii) presents a process of home location with expanding waves and moments of consolidation, (iii) has a many-centered metropolitan structure, and (iv) the dominating center separates progressively from the traditional center and is already located in the State of Mexico." (SUMMARY IN ENG)

Americas↗
PubMedDate not supplied

[Evaluation of the availability, utilization, and costs of computerized tomography in the state of Morelos, Mexico].

OBJECTIVE: To assess the availability, utilization, and costs of computerized tomography (CT scan) in private and public hospitals in Morelos State, Mexico. MATERIAL AND METHODS: From January to April 1999, a cross-sectional study was carried out in two private and two public hospitals in Morelos, Mexico. Individual face-to-face interviews were conducted with directors, managers, radiologists, and heads of maintenance at each hospital. Statistical analysis was performed to describe the variables measuring availability, utilization, and costs of CT scans. A comprehensive assessment of CT scans was also performed. Emphasis was made on the variability of observed patterns among the participating hospitals. RESULTS: CT scan technology has been used by hospitals in Morelos State for over ten years; programs for preventive or corrective maintenance of these equipments are available, although at high costs. No strategies for technology assessment are available for acquisition of CT scanners nor during their period of utilization. This study did not attempt to evaluate the appropriateness of the clinical use of CT nor its untoward effects. CONCLUSIONS: Findings from the present study showed that: 1) a lack of mechanisms for technology assessment and management of CT scans prevented hospitals from managing CT scanning technologies efficiently; 2) technology assessment regulation is not available, even though it is necessary for the adequate selection of the best technologies, on the basis of their efficiency, effectiveness, safety, and availability.

Cross-Sectional Studies↗
PubMedDate not supplied

[Frequency and some mortality risk factors in the state of Hidalgo, Mexico, due to neural tube closure defects].

OBJECTIVE: To calculate the risk of fetal death due to neural tube defects and estimate associated factors in the state of Hidalgo, Mexico. MATERIAL AND METHODS: Data were abstracted from death certificates registered during 1990-1995 in the state of Hidalgo, Mexico. The design was a proportional mortality study, which is considered as a variant of the case control design. Cases were deaths with any type of neural tube defect, and controls were fetal deaths due to other causes. RESULTS: A total of 3,673 fetal death certificates were analyzed; 8.06% had neural tube defects and the remaining died of other causes. Fetal death was associated with fetal weight less than 2500 grams (OR 5.0, 95% CI 3.6-6.8), being female (OR 1.7, 95% CI 1.3-2.3), and death during the late fetal period (OR 5.5, 95% CI 3.8-8.1). CONCLUSIONS: Results show that the risk of fetal death due to neural tube defects is greater among low birth weight babies, females, and during the late fetal period.

Adolescent↗
PubMed2002

Blood folate levels on the Texas-Mexico border.

The Texas-Mexico border population has a high prevalence of neural tube defects (NTDs). In 1998, in an effort to reduce the risk of NTD-affected pregnancies, the US Food and Drug Administration mandated folic acid fortification of enriched grain products. Since then, the median serum folate and red blood cell (RBC) folate levels of US women aged 15 through 44 years has risen. During 1995 through 2000, serum and RBC folate levels of 170 Mexican American women residing on the Texas-Mexico border who had delivered live, normal infants within the previous 3 months were tested. The median serum folate levels rose 46%, and RBC folate levels rose 44%. The increase suggests that food fortification may be affecting folate levels among populations with economic and cultural barriers to consuming fortified foods. However, more data are needed before we can assess the impact of food fortification on NTD rates on the border.

Adolescent↗