Sugar-Sweetened Beverages Consumption and Breast Cancer in Premenopausal and Postmenopausal Women.

Background: The consumption of sugar-sweetened beverages (SSB), of which Mexico is a large consumer, has been associated with the risk of breast cancer. We assessed the association between SSBs consumption and breast cancer risk in pre- and postmenopausal women.

Methods: We performed a multicenter population-based case-control study in Mexico City, Monterrey, and Veracruz.

Spatial patterns and risk of aggression of dogs and cats in a central township of Mexico City.

Dog and cat aggressions are public health concerns associated with rabies transmission to the human population. The social and environmental conditions of marginalized and urban areas stand a risk due to people's contact with dogs. This study aimed to identify spatial patterns related to dog and cat aggression in a densely populated area in the center of Mexico City, analyzing the risk of aggression at the census unit level in the 2018-2020 triennium.

Energy homeostasis genes modify the association between serum concentrations of IGF-1 and IGFBP-3 and breast cancer risk.

Breast cancer is a multifactorial disease in which the interplay among multiple risk factors remains unclear. Energy homeostasis genes play an important role in carcinogenesis and their interactions with the serum concentrations of IGF-1 and IGFBP-3 on the risk of breast cancer have not yet been investigated. The aim of this study was to assess the modifying effect of the genetic variation in some energy homeostasis genes on the association of serum concentrations of IGF-1 and IGFBP-3 with breast cancer risk.

Dietary patterns in Mexican preschool children are associated with stunting and overweight.

Objective: To evaluate the association between dietary patterns, stunting, and overweight among Mexican preschoolers.

Methods: This study was conducted with anthropometric (weight, height/length), sociodemographic (age, gender, education level of household head, socioeconomic status, country region and area, ethnicity, and beneficiary of social programs), and dietary data (Semiquantitative-food frequency questionnaire) on children aged from 1 to 4 years collected from the Mexican National Health and Nutrition Survey-2012. Dietary patterns were derived by principal components analysis.

High exposure to pathogenic leptospires by the population residing in dairy farms in Hidalgo, Mexico.

Leptospirosis is a neglected zoonotic disease of unknown magnitude that has been overlooked and underreported, influenced by complex interactions established among humans, animals, and the environment; certain occupations, such as working with livestock, have an increased risk of exposure. We conducted a cross trans-sectional study in 374 serum samples obtained from workers and residents of dairy farms in the Tizayuca Basin, Hidalgo, Mexico, to determine the prevalence of anti-Leptospira antibody and the risk factors associated to this type of environment. The determination of anti-Leptospira antibodies was obtained by microscopic agglutination test.

[Body fat percentage in adolescent among eating risk behaviors, home and sex].

Objective: To determine the association of risky eating behaviors and the home with the percentage of body fat in adolescents, modified by gender.

Materials And Methods: We analyzed the information of a cohort of 2 388 adolescents from Morelos in Mexico, from 2004 to 2007. Descriptive techniques and multiple linear regression models of mixed effects were performed.

Bedtimes and Blood Pressure: A Prospective Cohort Study of Mexican Adolescents.

Introduction: Hypertension affects up to 5% of children worldwide and predicts later cardiovascular morbidity. Associations of short sleep and hypertension have been frequently reported in adults but less consistently in children. This study aims to examine the role of late bedtimes, a marker of short sleep duration, and potentially misaligned circadian rhythms, on incident elevated blood pressure (BP) in a large cohort of Mexican children.

Synergistic action of folate intake and testosterone associated with breast cancer risk.

The amount of irreparable DNA damage is a function of the rate of cell division, and the association between sex hormones and the risk of breast cancer has been explained by an increase in cell division. Folate intake insufficiency leads to disturbances in DNA replication and DNA repair. We hypothesized that folate intake insufficiency and high serum concentrations of sex hormones act synergistically on the risk of breast cancer.

Perception of parents' physical activity as a positive model on physical activity of adolescents.

Physical activity (PA) promotes an adequate level of health in adolescents. The PA behaviors moderation is led by the adolescents' perception of their parents. We suppose that higher adolescents' perception of their parents' physical activity influences the physical activity spent in adolescents.

[Unhealthy behavior associated with the development of high blood pressure in adolescents].

This article aims to evaluate the association between unhealthy behavior pattern and prevalence and incidence of high blood pressure in adolescents. Based on data from a cohort study with a baseline population of 2,813 adolescents enrolled in a public school system, the study measured the baseline prevalence and incidence of high blood pressure as a function of smoking, alcohol and illegal drug use, and physical activity. These variables were used to build a model called "unhealthy behavior pattern", and its relationship was evaluated in relation to high blood pressure in adolescents, using multiple logistic regression models.

The Western dietary pattern is associated with increased serum concentrations of free estradiol in postmenopausal women: implications for breast cancer prevention.

Little is known about the possible influence of food consumption on the serum concentrations of endogenous sex hormones in postmenopausal women. We evaluated the relationships of the Western dietary pattern with serum concentrations of free estradiol and testosterone of postmenopausal women to test the hypothesis that a highly Western dietary pattern is associated with high serum concentrations of these hormones. We used data from a representative subsample of 305 women from the control group of a population-based case-control study conducted in Mexico from 2004 to 2007.

[Brucellosis, a zoonotic disease present in the population: A time series study in Mexico].

Objective: To determinate the relationship of human brucellosis incidence in Mexico during 2000-2011 in relation with domestic ruminant brucellosis.

Materials And Methods: An ecological time series study was analyzed using multilevel poisson multiple regression, the incidence of human brucellosis during 2000-2011 and incidence in ruminants and human development index.

Results: The high incidence of bovine brucellosis increased 19% the incidence of human brucellosis.

[Validation of reported location of solid waste using Procrustes analysis in the context of a participatory community initiative].

This study is part of a community initiative for integrated solid waste management based on "popular epidemiology" and participatory action research. The study proposes a method for validation of spatial data (X and Y data) on solid waste reported by community members. Location of sites was conducted by 76 residents of the La Nopalera community (Yautepec, Morelos, Mexico) and compared with reports by three environmental health experts.

The association between body shape silhouette and dietary pattern among Mexican women.

Objective: To investigate the relationship between dietary patterns and self-perceived body shape silhouette and BMI in a sample of Mexican women.

Design: A cross-sectional analysis of dietary habits from baseline data of a large cohort study (EsMaestra) conducted in 2006-2008.

Setting: The state of Veracruz, Mexico.

Healthy lifestyle on the risk of breast cancer.

Background: Many studies have analyzed the effect of behavioral risk factors such as common lifestyle patterns on the risk of disease. The aim of this study was to assess the effect of a healthy lifestyle index on the risk of breast cancer.

Methods: A population-based case-control study was conducted in Mexico from 2004 to 2007.

Body mass index associated with elevated blood pressure in Mexican school-aged adolescents.

Objective: To evaluate the relationship between blood pressure and body mass index among adolescents.

Methods: A 14-month period cross-sectional study was carried out among 2387 adolescents attending public schools in the state of Morelos, Mexico between 2005 and 2007. We measured blood pressure during four visits, obtaining elevated blood pressure prevalence according to the guidelines for children and adolescents of the United States National Educational Program on High Blood Pressure (at least three visits needed to assess elevated blood pressure on the basis of 95th percentile specific for gender, age and height).

Secondhand smoke exposure in Mexican discotheques.

This study describes the impact of exposure to secondhand smoke for subjects who spend time in a discotheque, by comparing within-subject baseline and postexposure urinary cotinine levels. A total of 100 nonsmoking volunteers from a central region of Mexico provided a urine sample before entering a discotheque and another sample an average of 6 hr after the end of exposure. Concentrations of cotinine and its metabolite, trans-3'-hydroxycotinine, were measured in the urine by liquid chromatography-mass spectrometry.

[Main challenges of the framework convention on tobacco control in Mexico: a surveillance report from the Global Youth Tobacco Survey].

Objective: This study presents findings from the Global Youth Tobacco Survey (GYTS) regarding current cigarette smoking and other tobacco epidemic indicators.

Material And Methods: The GYTS used a two-stage cluster sample survey to generate representative samples of students aged 12 to 15 years old enrolled in public, private and technical schools. The survey was undertaken at 492 schools in 21 cities.

[Immoderate alcohol consumption as predictor of tobacco smoking persistence among youth].

Objective: To evaluate the predictive factors of smoking persistence in young students in Morelos, Mexico.

Material And Methods: Information from a cohort study (1998-2001) of students in the public education system in the state of Morelos, Mexico was analyzed. The number of participants was 3,699.

[Poor school performance associated with tobacco persistence among Mexican students].

Objective: To evaluate the independent effect of poor school performance and tobacco persistence using a prospective population study of students who remained on school grounds during the follow-up period. Two measurements were taken over a period of three years.

Material And Methods: A cohort study conducted within school confines was developed over the period 1998 to 1999 and 2000 to 2001, with 2,568 students, including both tobacco persistent students and non-consumers.

Glycemic load, glycemic index, and the risk of breast cancer among Mexican women.

Objective: The amount and composition of dietary carbohydrates is a major determinant of postprandial blood glucose and insulin, and risk of breast cancer has been positively associated with plasma levels of insulin and insulin-like growth factor 1. We sought to evaluate dietary glycemic load (GL) and overall glycemic index (GI) in relation to breast cancer risk in Mexican women.

Methods: We examined dietary GL and overall GI and breast cancer risk among 475 women with histologically-confirmed breast cancer and a random sample of 1391 women from Mexico City households.

Consumption of higher numbers of cigarettes in Mexican youth: the importance of social permissiveness of smoking.

This study sought to assess the relationship between level of cigarette smoking and social factors indicating permissiveness of smoking among youth. This was a school-based cross-sectional questionnaire study carried out in a random sample of students (n=13,293, 11-24 years) at public schools in Morelos, Mexico. Chi2 test and multiple logistic regression analysis were used to evaluate correlates of level of smoking (> or < or = 5 cigarettes/day).

[Effect of smoking during pregnancy on anthropometric characteristics at birth].

Objective: To assess the effect of tobacco consumption during pregnancy on height and birth weight of newborns.

Material And Methods: Two cohort studies on lead exposure conducted in Mexico City between 1993 and 2000 were analyzed. Data were analyzed to assess the differences in height and birth weight between children of women who smoked during pregnancy and those who did not, adjusting for other important factors.

Carbohydrates and the risk of breast cancer among Mexican women.

Objective: High carbohydrate intake has been hypothesized to be a risk factor for breast cancer, possibly mediated by elevated levels of free insulin, estrogens, and insulin-like growth factor-1. Therefore, we conducted a population-based case-control study among a Mexican population characterized by relatively low fat and high carbohydrate intakes.

Methods: Women ages 20 to 75 years, identified through six hospitals in Mexico City (n = 475), were interviewed to obtain data relating to diet (using a food frequency questionnaire) and breast cancer risk factors.

[Smoking and its association to heart ischemic disease].

Objective: To assess the impact of cigarette smoking on coronary heart disease (CHD) and to propose a simple and efficient method to estimate its attributable fraction (AF).

Material And Methods: A matched case-control study was conducted in the Regional Hospital of Instituto Mexicano del Seguro Social (Mexican Institute of Social Security) in Morelos State, Mexico, from May to June-2000. Cases were 80 prevalent and incident patients with CHD.