Genotoxic Effects on Gas Station Attendants in South-southeastern México due to Prolonged and Chronic Exposure to Gasoline.

Background: Gasoline, a complex mixture of volatile organic compounds is classified as possibly carcinogenic to humans. Gasoline station attendants, consistently exposed to its hazardous components, may face genotoxic effects. This study aimed to assess the influence of varying work shift durations on DNA damage in gasoline station attendants.

[Impact of delivery care type on perinatal mortality in Tapachula, Chiapas, southern border of Mexico].

Purpose: To know and to explain the effects of the obstetrical assistance on the rate of perinatal mortality in a municipality of the state of Chiapas, Mexico which is distinguished by having a marginal rural zone, another one presenting an important agroindustrial and fishery development and the urban area.

Design: Transversal, epidemiological study. Some localities representing the three different geopolitic areas of the municipality were selected by probabilistic sampling.

[The effect of contraception on fertility in the border region of Chiapas, Mexico].

Objective: To estimate the effect of contraception on fertility in the border region of Chiapas, Mexico.

Materials And Methods: In 1994 an epidemiological cross-sectional study was carried out on a representative sample of 1,560 non-indigenous women between ages 15 and 49 in the border region of Chiapas. The prevalence of contraception practices and the total fertility rates (TFR) were obtained and stratified by rural, intermediate and urban communities.

Cholesterol levels and prevalence of hypercholesterolemia in a Mexican adult population.

In Mexico, the incidence and prevalence of coronary heart disease (CHD) has increased over the past three decades and has become the leading cause of death in the country. Hypercholesterolemia is a major risk factor for coronary atherosclerosis and most developed countries currently have public health strategies that attempt to reduce the level of cholesterol. In order to determine the mean total cholesterol values and the prevalence of hypercholesterolemia, an epidemiologic survey was carried out in a representative national population sample that included men and women aged 1 to 98 years.

[Factors related to drug use by adolescents in urban areas of Mexico].

This is a retrospective study on teenagers from 14 to 17 years of age based on data from the National Survey on Drug Addiction conducted in 1988. The aim of this study was to discover the factors linked to drug consumption among Mexican urban teenagers. This paper reports prevalence rates (PR), raw and adjusted by gender as well as Cornfield's intervals (CI) of 95 per cent.