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Search Results: 1 - 10 of 35405 matches for " Hernández-Romieu "
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Análisis de una encuesta poblacional para determinar los factores asociados al control de la diabetes mellitus en México
Hernández-Romieu,Alfonso Claudio; Elnecavé-Olaiz,Alejandro; Huerta-Uribe,Nidia; Reynoso-Noverón,Nancy;
Salud Pública de México , 2011, DOI: 10.1590/S0036-36342011000100006
Abstract: objective: determine the influence of nutritional counseling, exercise, access to social healthcare and drugs, and the quality of medical care on the control of diabetics. material and methods: the information and blood samples were obtained in 2005. glycemic control was defined as good if hba1c was <7.0%, poor from 7.01% - 9.50% and very poor if hba1c >9.5%. binary logistic regression models were used to determine the association of these factors with hba1c>9.5%. results: thirty percent of the patients with a medical diagnosis of diabetes had adequate metabolic control. conclusions: nutritional guidance was associated with an increase in the degree of control. a majority of diabetics have poor or very poor glycemic control. strengthening the quality of and access to medical care for these patients is urgently needed.
Validity and reproducibility of a food frequency questionnaire to assess dietary intake of women living in Mexico City
HERNáNDEZ-AVILA MAURICIO,ROMIEU ISABELLE,PARRA SOCORRO,HERNáNDEZ-AVILA JUAN
Salud Pública de México , 1998,
Abstract: Objective. To assess the reproducibility and validity of a 116 item semi-quantitative food frequency questionnaire (FFQ), designed to assess the relation between dietary intake and chronic diseases. Material and methods. To test the reproducibility of the FFQ questionnaire, the FFQ was administered twice to 134 women residing in Mexico City at an interval of approximately one year; to assess the validity we compared results obtained by the FFQs with those obtained by four 4-day 24-hour recalls at three month intervals. Validity and reproducibility were evaluated using regression analysis and Pearson and intraclass correlation coefficients of log-e and calorie-adjusted nutrient scores. Results. Mean values for intake of most nutrients assessed by the two food frequency questionnaires were similar. However, means for the 24-hr recall were significantly lower. Intraclass correlation coefficients for nutrient intakes, assessed by questionnaires, administered one year apart, ranged from 0.38 for cholesterol to 0.54 for crude fiber. Correlation coefficients between energy-adjusted nutrient intakes, measured by diet recalls, and the first FFQ ranged from 0.12 for polyunsaturated fatty acids to 0.67 for saturated fatty acids. Regression coefficients between 24-hr recall and FFQ,s were all significant were significant for all nutrients, except for polyunsaturated fat, folic acid, vitamin E and Zinc. Conclusions. These data indicate that this semi-quantitative FFQ is reproducible and provides a useful estimate by which to categorize individuals by level of past nutrient intake. However, its application outside Mexico City or in different age and gender populations will require additional modifications and validation efforts.
Validity and reproducibility of a food frequency questionnaire to assess dietary intake of women living in Mexico City
HERNáNDEZ-AVILA,MAURICIO; ROMIEU,ISABELLE; PARRA,SOCORRO; HERNáNDEZ-AVILA,JUAN; MADRIGAL,HERLINDA; WILLETT,WALTER;
Salud Pública de México , 1998, DOI: 10.1590/S0036-36341998000200005
Abstract: objective. to assess the reproducibility and validity of a 116 item semi-quantitative food frequency questionnaire (ffq), designed to assess the relation between dietary intake and chronic diseases. material and methods. to test the reproducibility of the ffq questionnaire, the ffq was administered twice to 134 women residing in mexico city at an interval of approximately one year; to assess the validity we compared results obtained by the ffqs with those obtained by four 4-day 24-hour recalls at three month intervals. validity and reproducibility were evaluated using regression analysis and pearson and intraclass correlation coefficients of log-e and calorie-adjusted nutrient scores. results. mean values for intake of most nutrients assessed by the two food frequency questionnaires were similar. however, means for the 24-hr recall were significantly lower. intraclass correlation coefficients for nutrient intakes, assessed by questionnaires, administered one year apart, ranged from 0.38 for cholesterol to 0.54 for crude fiber. correlation coefficients between energy-adjusted nutrient intakes, measured by diet recalls, and the first ffq ranged from 0.12 for polyunsaturated fatty acids to 0.67 for saturated fatty acids. regression coefficients between 24-hr recall and ffq,s were all significant were significant for all nutrients, except for polyunsaturated fat, folic acid, vitamin e and zinc. conclusions. these data indicate that this semi-quantitative ffq is reproducible and provides a useful estimate by which to categorize individuals by level of past nutrient intake. however, its application outside mexico city or in different age and gender populations will require additional modifications and validation efforts.
Environmental exposure of commuters in Mexico City to volatile organic compounds as assessed by blood concentrations, 1998
Lemire,Sharon; Ashley,David; Olaya,Patricia; Romieu,Isabelle; Welch,Susan; Meneses-González,Fernando; Hernández-Avila,Mauricio;
Salud Pública de México , 2004, DOI: 10.1590/S0036-36342004000100005
Abstract: objective: to assess the extent of exposure for volatile organic compounds (vocs) among nonoccupationally exposed commuters in mexico city. material and methods: blood concentrations of benzene, toluene, ethylbenzene, m-/p-xylene, o-xylene and methyl tert-butyl ether were determined on samples collected from participants after the morning commute. results: median blood concentrations of benzene (0.11 mg/l), ethylbenzene (0.081 mg/l), m-/p-xylene (0.32 mg/l) and toluene (0.56 mg/l) in the mexico city participants were all approximately two times higher than in a nonsmoking subset of the third national health and nutrition examination survey population of the united states. on the other hand, median voc blood levels were similar to medians observed in other studies involving commuters in specific u.s. cities, despite the fact that only half the mexico city study participants commuted by personal vehicles compared with all u.s. commuters. conclusions: these results reflect the extent of the air pollution problem in mexico city. the surrounding topography exacerbates the problems caused by heavy vehicular traffic, poor emission-control devices on older vehicles, and poor maintenance practices. elevated levels of gasoline components in the blood of nonoccupationally exposed commuters emphasize the need for regulatory initiatives and mass-transit options to reduce hydrocarbon emissions and thus reduce the risk for nonoccupational exposure for the residents of mexico city.
Acumulación de plomo en hueso y sus efectos en la salud
Sanín,Luz Helena; González-Cossío,Teresa; Romieu,Isabelle; Hernández-Avila,Mauricio;
Salud Pública de México , 1998, DOI: 10.1590/S0036-36341998000400009
Abstract: the adverse effects of lead have been known for long since the metal affects practically all organs and systems of the human body. recently, toxic effects have been reported in the cardiovascular and nervous systems at lead levels previously considered to be secure. the main lead storage site in the body is bone. the toxicologic significance of this fact has been clarified only recently. the present study analyzes the role of lead as an endogenous source of exposure, as a chronic exposure biomarker and as a target organ. recent advances to measure bone lead through fluorescent x-rays are discussed. additionally, the importance of bone lead from a public health perspective in places with a chronic history of exposure such as mexico city, and in some occupational environments is reviewed with particular attention placed on reproductive age women, who are potential lead sources for the fetus and lactating infant.
Breast cancer in Mexican women: an epidemiological study with cervical cancer control
Tovar-Guzmán Víctor,Hernández-Girón Carlos,Lazcano-Ponce Eduardo,Romieu Isabelle
Revista de Saúde Pública , 2000,
Abstract: INTRODUCTION: In Mexico, breast cancer (BC) is one of the main causes of cancer deaths in women, with increasing incidence and mortality in recent years. Therefore, the aim of the study is identify possible risk factors related to BC. METHODS: An epidemiological study of hospital cases of BC and controls with cervical uterine cancer (CUCA) was carried out at eight third level concentration hospitals in Mexico City. The total of 353 incident cases of BC and 630 controls with CUCA were identified among women younger than 75 years who had been residents of the metropolitan area of Mexico City for at least one year. Diagnosis was confirmed histologically in both groups. Variables were analyzed according to biological and statistical plausibility criteria. Univariate, bivariate and multivariate analyses were carried out. Cases and controls were stratified according to the menopausal hormonal status (pre and post menopause). RESULTS: The factors associated with BC were: higher socioeconomic level (OR= 2.77; 95%CI = 1.77 - 4.35); early menarche (OR= 1.32; 95%CI= 0.88 - 2.00); old age at first pregnancy (>31 years: OR= 5.49; 95%CI= 2.16 - 13.98) and a family history of BC (OR= 4.76; 95% CI= 2.10 - 10.79). In contrast, an increase in the duration of the breastfeeding period was a protective factor (>25 months: OR= 0.38; 95%CI= 0.20 - 0.70). CONCLUSIONS: This study contributes to the identification of risk factors for BC described in the international literature, in the population of Mexican women. Breastfeeding appears to play an important role in protecting women from BC. Because of changes in women`s lifestyles, lactation is decreasing in Mexico, and young women tend not to breastfeed or to shorten the duration of lactation.
Acumulación de plomo en hueso y sus efectos en la salud
Sanín Luz Helena,González-Cossío Teresa,Romieu Isabelle,Hernández-Avila Mauricio
Salud Pública de México , 1998,
Abstract: Los efectos nocivos del plomo han sido conocidos desde tiempos antiguos por su amplia gama; este metal afecta prácticamente todos los órganos y sistemas del cuerpo humano. Recientemente se han documentado efectos tóxicos crónicos en los sistemas cardiovascular y nervioso, con niveles que antes se consideraban seguros. El sitio primario de almacenamiento de plomo en el organismo es el hueso, pero sólo hasta fechas recientes se ha clarificado la significancia toxicológica de este hecho. En este artículo se analiza el papel del plomo en hueso como fuente de exposición endógena, como biomarcador de exposición crónica y como tejido blanco. Se presentan además los avances recientes para la medición de plomo en hueso mediante los rayos X-fluorescentes (XRF). Finalmente se revisa la importancia, para la salud pública, de estudiar y medir el plomo en hueso en lugares con una historia de exposición crónica como la Ciudad de México y en los ambientes ocupacionales, especialmente como fuente remanente de exposición. Se analiza especialmente el caso de mujeres en edad reproductiva, quienes pueden convertirse en fuentes de exposición para el feto y para el ni o amamantado.
Breast cancer in Mexican women: an epidemiological study with cervical cancer control
Tovar-Guzmán,Víctor; Hernández-Girón,Carlos; Lazcano-Ponce,Eduardo; Romieu,Isabelle; Hernández Avila,Mauricio;
Revista de Saúde Pública , 2000, DOI: 10.1590/S0034-89102000000200003
Abstract: introduction: in mexico, breast cancer (bc) is one of the main causes of cancer deaths in women, with increasing incidence and mortality in recent years. therefore, the aim of the study is identify possible risk factors related to bc. methods: an epidemiological study of hospital cases of bc and controls with cervical uterine cancer (cuca) was carried out at eight third level concentration hospitals in mexico city. the total of 353 incident cases of bc and 630 controls with cuca were identified among women younger than 75 years who had been residents of the metropolitan area of mexico city for at least one year. diagnosis was confirmed histologically in both groups. variables were analyzed according to biological and statistical plausibility criteria. univariate, bivariate and multivariate analyses were carried out. cases and controls were stratified according to the menopausal hormonal status (pre and post menopause). results: the factors associated with bc were: higher socioeconomic level (or= 2.77; 95%ci = 1.77 - 4.35); early menarche (or= 1.32; 95%ci= 0.88 - 2.00); old age at first pregnancy (>31 years: or= 5.49; 95%ci= 2.16 - 13.98) and a family history of bc (or= 4.76; 95% ci= 2.10 - 10.79). in contrast, an increase in the duration of the breastfeeding period was a protective factor (>25 months: or= 0.38; 95%ci= 0.20 - 0.70). conclusions: this study contributes to the identification of risk factors for bc described in the international literature, in the population of mexican women. breastfeeding appears to play an important role in protecting women from bc. because of changes in women`s lifestyles, lactation is decreasing in mexico, and young women tend not to breastfeed or to shorten the duration of lactation.
Efecto de la contaminación ambiental sobre las consultas por infecciones respiratorias en ni?os de la Ciudad de México
TéLLES-ROJO,MARTHA MARíA; ROMIEU,ISABELLE; POLO-PE?A,MARCO; RUIZ-VELASCO,SILVIA; MENESES-GONZáLEZ,FERNANDO; HERNáNDEZ-AVILA,MAURICIO;
Salud Pública de México , 1997, DOI: 10.1590/S0036-36341997000600004
Abstract: objective. to model the variability of medical visits by children for respiratory reasons as a consequence of the daily changes in environmental pollution observed in the emergency and family medicine departments of a hospital of the instituto mexicano del seguro social located in the southwest of mexico city during 1993. materials and methods. the correlation between the presence of upper and lower respiratory tract infections and exposure to ozone and nitrogen dioxide was studied. to model this association, the authors used multivariate poisson regression models with linear and non-linear risk, with lag periods between the environmental measurements and the medical visits of one, two and three days, as well as the average of the measurements of three, five and seven days previous to the visit. results. the model estimates that an increment of 50 ppb in the daily average of ozone would cause an increase of 9.9% in emergency visits due to high respiratory tract infections during the winter, which could rise to 30% if the increment would last five consecutive days in average. conclusions. results suggest that exposure of children younger than 15 years of age to ozone and nitrogen dioxide significantly affect the number of medical visits for respiratory causes in this part of mexico city.
Morbilidad infantil por causas respiratorias y su relación con la contaminación atmosférica en Ciudad Juárez, Chihuahua, México
Hernández-Cadena,Leticia; Barraza-Villarreal,Albino; Ramírez-Aguilar,Matiana; Moreno-Macías,Hortencia; Miller,Paul; Carbajal-Arroyo,Luz Aurora; Romieu,Isabelle;
Salud Pública de México , 2007, DOI: 10.1590/S0036-36342007000100005
Abstract: objective: to assess the impact of atmospheric pollutants on the respiratory health of children of different age groups in juarez city, chihuahua, mexico. material and methods: data on emergency room visits between 1997 and 2001 for respiratory diseases in children less than 17 years old were obtained from hospitals in the juarez city belonging to the mexican social security institute (imss). diseases were classified into three groups according to icd 9th and 10th codes: a) upper respiratory diseases, b) lower respiratory diseases, and c) asthma attacks. this information was stratified by age group (<=5 years and >5 years). daily air pollution data (ozone and pm10) and weather conditions were obtained from the monitoring network system in juarez city. statistical analysis was carried out using a generalized additive model assuming a poisson distribution. results: ozone concentrations, but not pm10, were statistically associated with emergency room visits for respiratory diseases, mainly among children 5 years old or younger. in this group, an increase of 20 ppb 1-hr maximum for ozone was associated with an increase of 8.3% in the number of emergency room visits for upper respiratory diseases, with a 3-day exposure lag; and an increase of 12.7% in the number of emergency room visits for lower respiratory diseases when considering a 4-day exposure lag in a maximum 8-hr mobile average. the largest effect for the complete sample and for the group 6 to 16 years of age was observed for 3-day lag (5.1% for an increase of 20 ppb 1-hr maximum for ozone). for the 6 to16 year old group we did not find a significant effect. conclusion: the wide range of risk is quite important and might represent a substantial cost for the health system as well as for the society. our results emphasize the need to implement preventive and control measures for air pollution and avoid the worsening of the present situation.
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