Burden of injury along the development spectrum: associations between the Socio-demographic Index and disability-adjusted life year estimates from the Global Burden of Disease Study 2017.

BACKGROUND: The epidemiological transition of non-communicable diseases replacing infectious diseases as the main contributors to disease burden has been well documented in global health literature. Less focus, however, has been given to the relationship between sociodemographic changes and injury. The aim of this study was to examine the association between disability-adjusted life years (DALYs) from injury for 195 countries and territories at different levels along the development spectrum between 1990 and 2017 based on the Global Burden of Disease (GBD) 2017 estimates. METHODS: Injury mortality was estimated using the GBD mortality database, corrections for garbage coding and CODEm-the cause of death ensemble modelling tool. Morbidity estimation was based on surveys and inpatient and outpatient data sets for 30 cause-of-injury with 47 nature-of-injury categories each. The Socio-demographic Index (SDI) is a composite indicator that includes lagged income per capita, average educational attainment over age 15 years and total fertility rate. RESULTS: For many causes of injury, age-standardised DALY rates declined with increasing SDI, although road injury, interpersonal violence and self-harm did not follow this pattern. Particularly for self-harm opposing patterns were observed in regions with similar SDI levels. For road injuries, this effect was less pronounced. CONCLUSIONS: The overall global pattern is that of declining injury burden with increasing SDI. However, not all injuries follow this pattern, which suggests multiple underlying mechanisms influencing injury DALYs. There is a need for a detailed understanding of these patterns to help to inform national and global efforts to address injury-related health outcomes across the development spectrum.

Global Mortality From Firearms, 1990-2016.

Importance: Understanding global variation in firearm mortality rates could guide prevention policies and interventions. Objective: To estimate mortality due to firearm injury deaths from 1990 to 2016 in 195 countries and territories. Design, Setting, and Participants: This study used deidentified aggregated data including 13 812 location-years of vital registration data to generate estimates of levels and rates of death by age-sex-year-location. The proportion of suicides in which a firearm was the lethal means was combined with an estimate of per capita gun ownership in a revised proxy measure used to evaluate the relationship between availability or access to firearms and firearm injury deaths. Exposures: Firearm ownership and access. Main Outcomes and Measures: Cause-specific deaths by age, sex, location, and year. Results: Worldwide, it was estimated that 251 000 (95% uncertainty interval [UI], 195 000-276 000) people died from firearm injuries in 2016, with 6 countries (Brazil, United States, Mexico, Colombia, Venezuela, and Guatemala) accounting for 50.5% (95% UI, 42.2%-54.8%) of those deaths. In 1990, there were an estimated 209 000 (95% UI, 172 000 to 235 000) deaths from firearm injuries. Globally, the majority of firearm injury deaths in 2016 were homicides (64.0% [95% UI, 54.2%-68.0%]; absolute value, 161 000 deaths [95% UI, 107 000-182 000]); additionally, 27% were firearm suicide deaths (67 500 [95% UI, 55 400-84 100]) and 9% were unintentional firearm deaths (23 000 [95% UI, 18 200-24 800]). From 1990 to 2016, there was no significant decrease in the estimated global age-standardized firearm homicide rate (-0.2% [95% UI, -0.8% to 0.2%]). Firearm suicide rates decreased globally at an annualized rate of 1.6% (95% UI, 1.1-2.0), but in 124 of 195 countries and territories included in this study, these levels were either constant or significant increases were estimated. There was an annualized decrease of 0.9% (95% UI, 0.5%-1.3%) in the global rate of age-standardized firearm deaths from 1990 to 2016. Aggregate firearm injury deaths in 2016 were highest among persons aged 20 to 24 years (for men, an estimated 34 700 deaths [95% UI, 24 900-39 700] and for women, an estimated 3580 deaths [95% UI, 2810-4210]). Estimates of the number of firearms by country were associated with higher rates of firearm suicide (P < .001; R2 = 0.21) and homicide (P < .001; R2 = 0.35). Conclusions and Relevance: This study estimated between 195 000 and 276 000 firearm injury deaths globally in 2016, the majority of which were firearm homicides. Despite an overall decrease in rates of firearm injury death since 1990, there was variation among countries and across demographic subgroups.

Temporal Trends in Mortality from Ischemic and Hemorrhagic Stroke in Mexico, 1980-2012.

BACKGROUND: Over the past decades, the decline in mortality from stroke has been more pronounced in high-income countries than in low- and middle-income countries. We evaluated changes in temporal stroke mortality trends in Mexico according to sex and type of stroke. METHODS: We assessed stroke mortality from Mexico's National Health Information System for the period from 1980 to 2012. We analyzed age-adjusted mortality rates by sex, type of stroke, and age group. The annual percentage change and the average annual percentage change (AAPC) in the slopes of the age-adjusted mortality trends were determined using joinpoint regression models. RESULTS: The age-adjusted mortality rates due to stroke decreased between 1980 and 2012, from 44.55 to 33.47 per 100,000 inhabitants, and the AAPC (95% confidence interval [CI]) was -.9 (-1.0 to -.7). The AAPC for females was -1.1 (-1.5 to -.7) and that for males was -.7 (-.9 to -.6). People older than 65 years showed the highest mortality throughout the period. Between 1980 and 2012, the AAPC (95% CI) for ischemic stroke was -3.8 (-4.8 to -2.8) and was -.5 (-.8 to -.2) for hemorrhagic stroke. For the same period, the AAPC for intracerebral hemorrhage (ICH) was -.7 (-1.6 to .2) and that for subarachnoid hemorrhage (SAH) was 1.6 (.4-2.8). CONCLUSIONS: The age-adjusted mortality rates of all strokes combined, ischemic stroke, hemorrhagic stroke, and ICH, decreased between 1980 and 2012 in Mexico. However, the increase in SAH mortality makes it necessary to explore the risk factors and clinical management of this type of stroke.

[Burden of disease, injuries, risk factors and challenges for the health system in Mexico]. / La carga de enfermedad, lesiones, factores de riesgo y desafíos para el sistema de salud en México.

OBJECTIVE: To present the results of the burden of disease, injuries and risk factors in Mexico from 1990 to 2010 for the principal illnesses, injuries and risk factors by sex. MATERIALS AND METHODS: A secondary analysis of the study results published by the Global Burden of Disease 2010 for Mexico performed by IHME. RESULTS: In 2010, Mexico lost 26.2 million of Disability adjusted live years (DALYs), 56 % were in male and 44 % in women. The main causes of DALYs in men are violence, ischemic heart disease and road traffic injuries. In the case of women the leading causes are diabetes, chronic kidney disease and ischemic heart diseases. The mental disorders and musculoskeletal conditions concentrate 18% of health lost. The risk factors that most affect men in Mexico are: alcohol consumption, overweight/obesity, high blood glucose levels and blood pressure and tobacco consumption (35.6 % of DALYs lost). In women, overweight and obesity, high blood sugar and blood pressure, lack of physical activity and consumption of alcohol are responsible for 40 % of DALYs lost. In both sexes the problems with diet contribute 12% of the burden. CONCLUSIONS: The epidemiological situation in Mexico, demands an urgent adaptation and modernization of the health system.

[Comparing pedestrian injury mortality in Mexico City: ¿have changes occurred over a decade?]. / Comparación de datos sobre mortalidad por atropellamientos en la Ciudad de México: ¿se han presentado cambios en una década?

OBJECTIVE: To compare and analyze the main characteristics associated with pedestrian injuries mortality in Mexico City. MATERIAL AND METHODS: A crossectional design was done using the mortality database related with pedestrian fatality during the periods 1994-1997 and 2004-2007. Variables as sex, age, residence, education and place of evento ccurrence were analyzed. Standardized mortality ratios by delegation were used to the analysis. RESULTS: There was a reduction during 2004-2007 at least 17.5% in deaths by pedestrian injuries and mortality rate of 1.9/100.000 inhabitants on the first period.The high decrease was in men (4,6/100.000) than in women (1,2/100.000). (p<0,05). Four delegations presented the highest risk of pedestrian injuries death during both periods. CONCLUSIONS: Results show significant changes among both periods. Differences by sex pointed out the need of a differential analysis of the problem. Contribute to elaborate new research questions to be addressed in the future to work on the prevention of this public health problem.

Lactobacillus paracasei as a protective factor of obesity induced by an unhealthy diet in children.

This study examined the association between intestinal lactobacilli and obesity dependent on dietary patterns in children. A cross-sectional study was conducted including 1111 children, 6-12 years old. Obesity was determined according to the WHO cut-off points. Diet information from a Food Frequency Questionnaire identified three dietary patterns. Lactobacillus sp. were determined by a real-time polymerase chain reaction (PCR). The consumption of complex carbohydrates and a high abundance of L. paracasei were associated with a lower risk of obesity (0.35, Confidence Interval 95% 0.19-0.65). The same happened with a medium consumption of fats and a medium abundance of L. paracasei (0.43, CI95% 0.24-0.78). In contrast, an increased risk of obesity is observed with a medium and high consumption of simple carbohydrates (2.37, CI95% 1.29-4.34 and 2.52, CI95% 1.36-4.66, respectively, p-trend<0.05), and low consumption of complex carbohydrates (2.49, CI95% 1.35-4.58), in the presence of a high relative abundance of L. reuteri. A high relative abundance of L. paracasei decreased the risk of obesity, even when high-fat and simple carbohydrate diets were consumed; while a high relative abundance of L. reuteri was associated with a greater possibility of obesity with these types of diets. Our results provide evidence of diet implication in metabolism regulators like lactobacilli. This is helpful in strategies development to promote healthy diets during early stages of life.

Dengue seroprevalence in a cohort of schoolchildren and their siblings in Yucatan, Mexico (2015-2016).

BACKGROUND: The implementation of vector control interventions and potential introduction new tools requires baseline data to evaluate their direct and indirect effects. The objective of the study is to present the seroprevalence of dengue infection in a cohort of children 0 to 15 years old followed during 2015 to 2016, the risk factors and the role of enhanced surveillance strategies in three urban sites (Merida, Ticul and Progreso) in Yucatan, Mexico. METHODS: A cohort of school children and their family members was randomly selected in three urban areas with different demographic, social conditions and levels of transmission. We included results from 1,844 children aged 0 to 15 years. Serum samples were tested for IgG, NS1 and IgM. Enhanced surveillance strategies were established in schools (absenteeism) and cohort families (toll-free number). RESULTS: Seroprevalence in children 0 to 15 years old was 46.8 (CI 95% 44.1-49.6) with no difference by sex except in Ticul. Prevalence increased with age and was significantly lower in 0 to 5 years old (26.9%, 95% CI:18.4-35.4) compared with 6 to 8 years old (43.9%, 95% CI:40.1-47.7) and 9 to 15 years old (61.4%, 95% CI:58.0-64.8). Sharing the domestic space with other families increased the risk 1.7 times over the individual families that own or rented their house, while risk was significantly higher when kitchen and bathroom were outside. Complete protection with screens in doors and windows decreased risk of infection. Seroprevalence was significantly higher in the medium and high risk areas. CONCLUSIONS: The prevalence of antibodies in children 0 to 15 years in three urban settings in the state of Yucatan describe the high exposure and the heterogenous transmission of dengue virus by risk areas and between schools in the study sites. The enhanced surveillance strategy was useful to improve detection of dengue cases with the coincident transmission of chikungunya and Zika viruses.

Costs of medical care for acute myocardial infarction attributable to tobacco consumption.

BACKGROUND: Tobacco consumption is the principal modifiable risk factor causally associated with acute myocardial infarction (AMI). AMI has been an increasing and important cause of death in Mexico since 1980. METHODS: To estimate the direct health care costs of AMI, we carried out a cost of illness (COI) analysis, using data derived from an expert panel consensus and from medical chart review. We used the smoking attributable fraction (SAF) estimates to derive costs of tobacco consumption. We also estimated the benefits of a "Smoke-free Workplace" tobacco control policy in terms of avoidable deaths and health care costs savings. RESULTS: We estimated an annual average costs of 6,420 US dollars and 9,216 US dollars for non-ST segment elevation AMI (NSTEMI) and ST segment elevation AMI (STEMI), respectively. The total annual health care costs estimated for incident AMI for the IMSS state-level division of Morelos reached 2.9 million US dollars, of which 1.6 million US dollars was directly attributed to tobacco consumption. CONCLUSIONS: Our results confirm the high costs associated with smoking and show the potential benefits resulting from a tobacco control policy. Our estimates are only applicable to social security in the state-level division of Morelos and more likely represent a lower boundary of the total costs of cardiovascular diseases attributed to tobacco, because we based the costs estimation on incident cases, and we did not take into consideration the costs derived from prevalent cases, indirect costs or other intangibles.

Tendencia de la mortalidad por trastornos mentales: un panorama epidemiológico en México (1980-2011) / Tendency of mortality due to mental disorders: an epidemiologic view (Mexico, 1980-2011)

Resumen Se presentan resultados que buscan caracterizar el panorama epidemiológico sobre la tendencia de la mortalidad derivada de enfermedades mentales, específicamente psicosis alcohólica, ocurrido en los últimos 30 años, en la República Mexicana.

Abstract Here we present the results that show the tendency in mortality due to mental disorders, specifically alcohol-related psychosis, in the last 30 years in Mexico.

La carga de enfermedad, lesiones, factores de riesgo y desafíos para el sistema de salud en México / Burden of disease, injuries, risk factors and challenges for the health system in Mexico

Objetivo. Presentar los resultados de la carga de enfermedad en México de 1990 a 2010 para las principales enfermedades, lesiones y factores de riesgo, por sexo. Materiales y métodos. Se realizó un análisis secundario del estudio de la carga mundial de la enfermedad 2010. Resultados. En 2010 se perdieron 26.2 millones de años de vida saludable (AVISA), 56% en hombres y 44% en mujeres. Las principales causas de AVISA en hombres fueron violencia, cardiopatía isquémica y los accidentes de tránsito. En las mujeres fueron la diabetes, la enfermedad renal crónica y la cardiopatía isquémica. Los trastornos mentales y musculoesqueléticos concentran 18% de la carga. Los factores de riesgo que más afectan a los hombres son sobrepeso/obesidad; niveles de glucosa en sangre y de presión arterial elevados; y el consumo de alcohol y tabaco (35.6% de AVISA perdidos). En las mujeres, el sobrepeso y la obesidad; glucosa elevada; hipertensión arterial; baja actividad física; y el consumo de alcohol y tabaco fueron responsables de 40% de los AVISA perdidos; en ambos sexos, la dieta contribuye con 12% de la carga. Conclusiones. El panorama epidemiológico en México demanda una urgente adecuación y modernización del sistema de salud.

Objective. To present the results of the burden of disease, injuries and risk factors in Mexico from 1990 to 2010 for the principal illnesses, injuries and risk factors by sex. Materials and methods. A secondary analysis of the study results published by the Global Burden of Disease 2010 for Mexico performed by IHME. Results. In 2010, Mexico lost 26.2 million of Disability adjusted live years (DALYs), 56 % were in male and 44 % in women. The main causes of DALYs in men are violence, ischemic heart disease and road traffic injuries. In the case of women the leading causes are diabetes, chronic kidney disease and ischemic heart diseases. The mental disorders and musculoskeletal conditions concentrate 18% of health lost. The risk factors that most affect men in Mexico are: alcohol consumption, overweight/obesity, high blood glucose levels and blood pressure and tobacco consumption (35.6 % of DALYs lost). In women, overweight and obesity, high blood sugar and blood pressure, lack of physical activity and consumption of alcohol are responsible for 40 % of DALYs lost. In both sexes the problems with diet contribute 12% of the burden. Conclusions. The epidemiological situation in Mexico, demands an urgent adaptation and modernization of the health system.

Comparación de datos sobre mortalidad por atropellamientos en la Ciudad de México: ¿se han presentado cambios en una década? / Comparing pedestrian injury mortality in Mexico City: ¿have changes occurred over a decade?

OBJETIVO: Comparar y analizar las principales características de los peatones asociadas con muertes por atropellamiento en la Ciudad de México. MATERIAL Y MÉTODOS: Diseño transversal comparativo que emplea registros de muertes por atropellamiento en la Ciudad de México durante dos periodos iguales 1994-1997 y 2004-2007.Variables analizadas: sexo, edad, lugar de residencia y de ocurrencia,escolaridad y cohorte de nacimiento.Se elaboraron razones estandarizadas de mortalidad por delegación. RESULTADOS: La mortalidad por atropellamientos en 2004-2007 desciende 17.5 por ciento y la tasa en 1.9/100.000 habitantes respecto del primer periodo. El descenso es mayor en hombres (4,6/100.000) que en mujeres (1,2/100,000). El riesgo se concentra en cuatro delegaciones, para ambos períodos. CONCLUSIONES: La metodología permite observar cambios significativos entre los periodos analizados y genera la necesidad del análisis por sexo. Los resultados plantean nuevas preguntas a resolver con otros diseños encaminados a la prevención de este problema de salud pública.

OBJECTIVE: To compare and analyze the main characteristics associated with pedestrian injuries mortality in Mexico City. MATERIAL AND METHODS: A crossectional design was done using the mortality database related with pedestrian fatality during the periods 1994-1997 and 2004-2007. Variables as sex, age, residence, education and place of evento ccurrence were analyzed. Standardized mortality ratios by delegation were used to the analysis. RESULTS: There was a reduction during 2004-2007 at least 17.5 percent in deaths by pedestrian injuries and mortality rate of 1.9/100.000 inhabitants on the first period.The high decrease was in men (4,6/100.000) than in women (1,2/100.000). (p<0,05). Four delegations presented the highest risk of pedestrian injuries death during both periods. CONCLUSIONS: Results show significant changes among both periods. Differences by sex pointed out the need of a differential analysis of the problem. Contribute to elaborate new research questions to be addressed in the future to work on the prevention of this public health problem.

[Smoking among health professionals of the Mexican Social Security Institute, Morelos]. / Tabaquismo en profesionales de la salud del instituto Mexicano del Seguro Social, Morelos.

OBJECTIVE: To assess the prevalence of tobacco smoking by work type among healthcare workers of Instituto Mexicano del Seguro Social (Mexican Institute of Social Security, IMSS), in Morelos State, Mexico. MATERIAL AND METHODS: A cross-sectional was conducted in 3,133 healthcare workers in the 23 medical units of IMSS Morelos District, from October 1998 to March 2000. Data were collected using a self-applied questionnaire on tobacco smoking for different life-stages, some demographic characteristics, and work type. The prevalence rates of smoking and 95% confidence intervals (95% CI) were estimated by age groups, gender, and work type. RESULTS: A total of 3,133 employees participated; 53.4% (95% CI 50.8-56.8) of men and 27.4% (95% CI 25.4-29.3) of women reported having smoked tobacco some time in their lives. The prevalence of current smoking was 28.3% (95% CI 25.6-31.0) and 14.4% (95% CI 12.8-15.9) in men and women, respectively. Among men, physicians have a lower prevalence (20.9%) of current smoking than that of other workers; for example, the prevalence was 26.6% among technicians and 33% among administrative personnel. Women in general had a lower prevalence than men in all categories, and in nurses it was still lower t(12.5%) than that of female physicians (16%). CONCLUSIONS: The prevalence of tobacco smoking in healthcare workers of IMSS Morelos was lower than that of the general population. Nevertheless, it is necessary to keep working on tobacco control programs to encourage smoking cessation among healthcare workers and make them aware of the positive role they may play in promoting programs to stop tobacco smoking and nicotine addiction.

[Trends of tobacco demand in Mexico: 1992-1998]. / El comportamiento de la demanda de tabaco en México: 1992-1998.

OBJECTIVE: This paper aims at describing the behavior of tobacco's demand in Mexico across four one-year periods: 1992, 1994, 1996, and 1998, as well as to estimate a cigarette demand function. MATERIAL AND METHODS: A cross-sectional study with longitudinal analysis was conducted. Information sources were the Encuesta Nacional de Ingreso y Gasto de los Hogares (ENIGH) (National Survey of Household Income and Spending) (NHSIS) and the tobacco pack prices reported by the Procuraduría Federal del Consumidor (Profeco) (Federal Office of Consumer's Protection) (FOCP). Spending, income, and prices were deflated to 1994 prices; the population was stratified into quintiles of real income, by rural and urban areas. Indicators of daily consumption of cigarettes and packs were constructed and prices per pack calculated. Adjusted prevalence figures were estimated. Logistic and linear regression models were used for statistical inference; a cigarette demand function was estimated using multivariate logistic regression, to find socioeconomic determinants of cigarette consumption. RESULTS: The adjusted prevalence of household tobacco spending fell from 22.4 to 9.9% between 1992 and 1998. Households allocated more than 4% of their income to tobacco consumption. A trend between income level and cigarette spending was observed, with the first quintile (the poorest population) allocated a greater share of their income than higher quintiles. The average daily consumption of cigarettes increased from 7.5 to 9.8 between 1992 and 1998. It was estimated that 90% of "smoker homes" consumed up to one package per day. The proportion of non-filter cigarettes increased from 0.4 to 4.8% between 1992-1998, with a bigger increase in 1996. Finally, it was found that the most important determinants of spending were prices and income. CONCLUSIONS: Policies focusing on tobacco prices would help to reduce tobacco consumption and improve the health of the Mexican population.

Tabaquismo en profesionales de la salud del Instituto Mexicano del Seguro Social, Morelos / x

Objetivo. Determinar la prevalencia de hábito tabáquico por categoría laboral en trabajadores de la salud del Instituto Mexicano del Seguro Social (IMSS), en el estado de Morelos, México. Material y métodos. Se realizó un estudio transversal en 3 133 empleados de los servicios médicos de las 23 unidades médicas con que cuenta la delegación Morelos del IMSS, durante el periodo de octubre de 1998 a marzo de 2000. Mediante un cuestionario autoaplicable se recolectó información sobre patrones de consumo de tabaco en distintas etapas de la vida, así como algunas características demográficas y categoría laboral. Se estimaron prevalencias e intervalos de confianza al 95 por ciento por grupos de edad y sexo para distintas categorías laborales. Resultados. De los 3 133 empleados participantes, 53.4 por ciento (IC 95 por ciento 50.8-56.8) de los hombres y 27.4 por ciento (IC 95 por ciento 25.4-29.3) de las mujeres contaban con historia de tabaquismo en algún momento de la vida. La prevalencia de tabaquismo activo fue de 28.3 por ciento (IC 95 por ciento 25.6-31.0) y 14.4 por ciento (IC 95 por ciento 12.8-15.9) en hombres y mujeres, respectivamente. Entre los hombres, los médicos presentan una prevalencia de tabaquismo activo menor (20.9 por ciento) que la observada entre trabajadores de otras áreas: personal administrativo (33.0 por ciento) y personal técnico de distintas categorías (26.6 por ciento). Las mujeres muestran en general una prevalencia menor que los hombres en todas las categorías, y las enfermeras presentan una prevalencia discretamente menor (12.5 por ciento) que las médicas (16.0 por ciento). Conclusiones. El patrón del consumo de tabaco observado en profesionales de la salud del IMSS Morelos muestra una prevalencia menor a la observada en población general. Sin embargo, es necesario continuar con programas para desalentar el consumo del tabaco entre profesionales de la salud, y tratar de hacerlos concientes acerca de la influencia...

Objective. To assess the prevalence of tobacco smoking by work type among healthcare workers of Instituto Mexicano del Seguro Social (Mexican Institute of Social Security, IMSS), in Morelos State, Mexico. Material and Methods. A cross-sectional was conducted in 3 133 healthcare workers in the 23 medical units of IMSS Morelos District, from October 1998 to March 2000. Data were collected using a self-applied questionnaire on tobacco smoking for different life-stages, some demographic characteristics, and work type. The prevalence rates of smoking and 95 percent confidence intervals (95 percent CI) were estimated by age groups, gender, and work type. Results. A total of 3 133 employees participated; 53.4 percent (95 percent CI 50.8-56.8) of men and 27.4 percent (95 percent CI 25.4-29.3) of women reported having smoked tobacco some time in their lives. The prevalence of current smoking was 28.3 percent (95 percent CI 25.6-31.0) and 14.4 percent (95 percent CI 12.8-15.9) in men and women, respectively. Among men, physicians have a lower prevalence (20.9 percent) of current smoking than that of other workers; for example, the prevalence was 26,6 percent among technicians and 33 percent among administrative personnel. Women in general had a lower prevalence than men in all categories, and in nurses it was still lower t(12,5 percent) than that of female physicians (16 percent). Conclusions. The prevalence of tobacco smoking in healthcare workers of IMSS Morelos was lower than that of the general population. Nevertheless, it is necessary to keep working on tobacco control programs to encourage smoking cessation among healthcare workers and make them aware of the positive role they may play in promoting programs to stop tobacco smoking and nicotine addiction.

El comportamiento de la demanda de tabaco en México: 1992-1998 / x

Objetivo. Describir el comportamiento de la demanda de tabaco en México para cuatro momentos en el tiempo: 1992, 1994, 1996 y 1998, y adicionalmente estimar una función de demanda de cigarrillos. Material y métodos. Se realizó un estudio transversal con análisis longitudinal, tomando como fuentes de información la Encuesta Nacional de Ingreso y Gasto de los Hogares (ENIGH) y la lista de precios de los cigarrillos de la Procuraduría Federal del Consumidor (Profeco). El gasto, el ingreso y los precios se deflactaron a precios de 1994. Se estratificó a la población en quintiles de ingreso real, y solamente se tomaron en cuenta las áreas rurales y urbanas. Se construyeron indicadores para el consumo diario de cigarrillos y cajetillas y se calcularon los precios por cajetilla. Se calculó la prevalencia ajustada. Mediante análisis de regresión logísticos y lineales se estableció la inferencia estadística. Se estimó una función de demanda de cigarrillos mediante una regresión lineal multivariada, para encontrar los determinantes socioeconómicos del consumo de cigarrillos. Resultados. La prevalencia ajustada de los hogares que reportaron algún gasto en tabaco disminuyó de 22.4 a 9.9 por ciento entre 1992 y 1998. Los hogares asignaron poco más de 4 por ciento de su ingreso a la adquisición de tabaco. Se observó un gradiente entre nivel de ingreso y gasto en cigarrillos. El quintil I (el más pobre) destinó una mayor proporción de su ingreso que los quintiles superiores. El promedio de cigarrillos consumidos diariamente pasó de 7.5 a 9.8 entre 1992 y 1998. Se estimó que más de 90 por ciento de los "hogares fumadores" consumió hasta una cajetilla diaria. La demanda estimada de cigarrillos sin filtro aumentó entre 1992 a 1998, pasando de 0.4 a 4.8 por ciento, registrándose así el mayor incremento en 1996. Finalmente, se encontró que, tanto los precios como el ingreso, fueron los determinantes más importantes del gasto en tabaco. Conclusiones. Una...

Objective. This paper aims at describing the behavior of tobacco's demand in Mexico across four one-year periods: 1992, 1994, 1996, and 1998, as well as to estimate a cigarette demand function. Material and Methods. A cross-sectional study with longitudinal analysis was conducted. Information sources were the Encuesta Nacional de Ingreso y Gasto de los Hogares (ENIGH) (National Survey of Household Income and Spending) (NHSIS) and the tobacco pack prices reported by the Procuraduría Federal del Consumidor (Profeco) (Federal Office of Consumer's Protection) (FOCP). Spending, income, and prices were deflated to 1994 prices; the population was stratified into quintiles of real income, by rural and urban areas. Indicators of daily consumption of cigarettes and packs were constructed and prices per pack calculated. Adjusted prevalence figures were estimated. Logistic and linear regression models were used for statistical inference; a cigarette demand function was estimated using multivariate logistic regression, to find socioeconomic determinants of cigarette consumption. Results. The adjusted prevalence of household tobacco spending fell from 22.4 to 9.9 percent between 1992 and 1998. Households allocated more than 4 percent of their income to tobacco consumption. A trend between income level and cigarette spending was observed, with the first quintile (the poorest population) allocated a greater share of their income than higher quintiles. The average daily consumption of cigarettes increased from 7.5 to 9.8 between 1992 and 1998. It was estimated that 90 percent of "smoker homes" consumed up to one package per day. The proportion of non-filter cigarettes increased from 0.4 to 4.8 percent between 1992-1998, with a bigger increase in 1996. Finally, it was found that the most important determinants of spending were prices and income. Conclusions. Policies focusing on tobacco prices would help to reduce tobacco consumption and improve the health...