Development of Statistical Software for the Korean Laboratory Accreditation Program Using R Language: LaboStats

BACKGROUND: In Korea, the Korean Laboratory Accreditation Program (KLAP) has set minimum standards for verification of clinical test performance. This verification process is time-consuming and labor-intensive when performed manually. We developed a free, statistical software program for KLAP, using the R language (R Foundation for Statistical Computing, Vienna, Austria). METHODS: We used CLSI guidelines for the algorithm. We built graphic user interfaces, including data input, with Embarcadero Delphi EX4 (Embarcadero Technologies, Inc., Texas, USA). The R Base Package and MCR Package for Method Comparison Regression were used to implement statistical and graphical procedures. RESULTS: Our program LaboStats has six modules: parallel test, linearity, method comparison, precision, reference interval, and cutoff. Data can be entered into the field either manually or by copying and pasting from an MS Excel worksheet. Users can print out precise reports. CONCLUSIONS: LaboStats can be useful for evaluating clinical test performance characteristics and preparing documents requested by KLAP.

Estructura y diversidad de la vegetación en un matorral espinoso prístino de Tamaulipas, México / Structure and diversity of the vegetation of pristine scrubland in Tamaulipas, Mexico

Resumen El matorral espinoso tamaulipeco es un tipo de vegetación arbustiva endémica del noreste de México y el Sur de Texas en E.U. En el estudio se evaluó la estructura del matorral espinoso tamaulipeco, estableciendo el área mínima con parcelas de 256 m2 mediante la determinación de la curva especies-área. La composición y diversidad de los estratos de las especies vegetales (arbóreas, arbustivas, subarbustivo, semiarbustivo, herbáceas y epífitas) se valoraron y se establecieron tres sitios de muestreo de 16×16 m. Se registró información dasométrica de altura, diámetro y cobertura de copa para determinar las variables estructurales de cobertura, densidad, densidad relativa, dominancia, dominancia relativa, frecuencia, frecuencia relativa e Índice de Valor de Importancia, así como la estimación del índice de riqueza de Margalef, índice de diversidad de Shannon-Wiener, de Menhinick, Simpson y el de Equidad de Pielou. La riqueza florística fue de 33 especies, distribuidas en 30 géneros y 19 familias, quedando con el valor de predominancia más altos las especies de Leguminosas (Fabaceae). Se reconocieron seis estratos para la vegetación estudiada, en el estrato arbustivo se encontraron 14 especies, la de mayor IVI fue Helietta parvifolia con 17.68 % y dentro de la comunidad vegetal del MET el IVI fue de 8.53 %. Para el estrato subarbustivo con ocho especies la de mayor IVI fue Bernardia myricifolia con 39.20 % y dentro de la comunidad vegetal 7.74 %. Para el semiarbustivo se presentaron siete especies donde Lantana canescens tiene un IVI de 60.38 % y dentro de la comunidad 13.09 %, para el estrato herbáceo con dos especies domina Wissadula sp., con 54.20 % y 2.06 % para la comunidad. En el estrato arbóreo la especie con mayor IVI fue Celtis laevigata con el 100 % e integrado a la comunidad vegetal presentó un valor de 1.98 % y para el estrato formado por las epífitas la especie Adiantum capillus-veneris tuvo un IVI del 100 % y dentro de la comunidad vegetal presentó un IVI de 1.55 %. Para la comunidad vegetal del MET se obtuvo un valor H´ de 2.42 y un DMg de 4.34.(AU)

Abstract Tamaulipan scrubland is a type of shrub vegetation endemic to Northeastern Mexico and Southern Texas in the U.S. The structure of the Tamaulipan scrubland was evaluated in the study, establishing the minimum area with plots of 256 m2 by determining the species-area curve, valuing the composition and diversity of the strata of the plant species (arboreal, shrub, low forest, semi shrubby, herbaceous and epiphytes); three sampling sites of 16×16 m were established. Dasometric information such as height, diameter and cup coverage was recorded to determine the structural variables of coverage, density, relative density, dominance, relative dominance, frequency, relative frequency and Importance Value Index, as well as estimation of the Margalef richness index, Shannon-Wiener diversity index, Menhinick, Simpson and Pielou's evenness index. The floristic richness was of 33 species distributed in 30 genera and 19 families, leaving the predominance value of the highest species of Leguminosae (Fabaceae). Six strata were recognized for the studied vegetation from which the highest IVI was Helietta parvifolia with 17.68 % for the shrubby stratum with 14 species and within the plant community of the MET the IVI was 8.53 %; for the low forest stratum with 8 species, the one with the highest IVI was Bernardia myricifolia with 39.20 %; and within the vegetal community 7.74 % for the semi shrubby there were 7 species where Lantana canescens has an IVI of 60.38 % and of 13.09 % inside the community. For the herbaceous stratum with 2 species, Wissadula sp. dominates with 54.20 % and 2.06 % for the community. In the arboreal stratum, the species with the highest IVI was Celtis laevigata with 100.00 % and when integrated to the plant community, it presented a value of 1.98 %. For the stratum formed by the epiphytes, the species Adiantum capillus-veneris had an IVI of 100 % and inside the plant community presented an IVI of 1.55 %. For the MET plant community studied, an H' value of 2.42 and a DMg value of 4.34 was obtained.(AU)

Drug use on both sides of the US-Mexico border / Uso de drogas en ambos lados de la frontera Estados Unidos-México

Abstract Objective To compare drug use for cities along the US-Mexico border. Materials and methods Data are from the US-Mexico Study on Alcohol and Related Conditions (UMSARC, 2011-2013), a survey of 4 796 randomly selected Mexican and of Mexican origin individuals on both sides of the border. Results Higher rates of any past-year drug use and symptoms of drug use disorders were found only in the border city of Laredo, when compared to the non-border city of San Antonio. Nuevo Laredo and Reynosa/Matamoros showed higher rates of drug use than the non-border city of Monterrey. Much higher rates (OR's in the range of 4-11) were found in the US cities when compared to their across-the-border Mexican counterparts. Conclusions Drug use is high on the border for the selected Mexican cities. Misuse of prescription drugs is nevertheless a concern in the south Texas border cities in our study.

Resumen Objetivo Comparar el consumo de drogas para las ciudades a lo largo de la frontera Estados Unidos-México. Material y métodos Los datos provienen del Estudio "US-Mexico study on alcohol and related conditions" (UMSARC, 2011- 2013), una encuesta de 4 796 personas mexicanas y de origen mexicano en ambos lados de la frontera. Resultados Las tasas más altas de cualquier consumo de drogas en el año pasado y los síntomas de trastornos por uso de drogas se encontraron sólo en la ciudad fronteriza de Laredo, en com paración con la ciudad no fronteriza de San Antonio. Tanto Nuevo Laredo como Reynosa/Matamoros mostraron mayo res tasas de consumo de drogas que la ciudad no fronteriza de Monterrey. Tasas mucho más altas (OR en el rango de 4-11) fueron encontradas en las ciudades de los Estados Unidos en comparación con sus contrapartes mexicanas fronterizas. Conclusiones El consumo de drogas en México es alto en la frontera. El uso de medicamentos recetados fuera de prescripción es una preocupación en las ciudades fronterizas del sur de Texas.

Exploring Demographic and Environmental Factors Related to Unintentional Pesticide Poisonings in Children and Adolescents in Texas

There is limited literature on the frequency and distribution of pesticide exposures, specifically with respect to demographic and environmental factors in the United States. The purpose of this exploratory study was to investigate geographic trends and factors associated with unintentional pesticide exposures in children and adolescents in Texas. The study used an ecological design with secondary data. A spatial scan statistic, based on a Poisson regression model, was employed to identify spatial clusters of unintentional pesticide-related poison center exposures. Next, logistic regression models were constructed to identify potential demographic and environmental factors associated with unintentional pesticide-related poison center exposures. There were 59,477 unintentional pesticide-related poison center exposures from 2000 to 2013. The spatial scan statistic found a change in the number of counties in the identified clusters (e.g. , aggregation of counties with higher than expected exposures) for two time periods (2000-2006; 2007-2013). Based on the logistic regression models, factors associated with unintentional pesticide-related poison center exposures were percent black or African American population, year structure built, and percent moved in the past 12 months. In conclusion, this study found certain demographic and environmental factors may be associated with unintentional pesticide-related poison center exposures. Through understanding trends and associated factors, public health professionals can design interventions for populations at higher risk of pesticide exposures. This study also supports the use of spatial methods being utilized to expand upon current analysis of poison center data. Future research should confirm and build upon these findings.

Exploring Demographic and Environmental Factors Related to Unintentional Pesticide Poisonings in Children and Adolescents in Texas

There is limited literature on the frequency and distribution of pesticide exposures, specifically with respect to demographic and environmental factors in the United States. The purpose of this exploratory study was to investigate geographic trends and factors associated with unintentional pesticide exposures in children and adolescents in Texas. The study used an ecological design with secondary data. A spatial scan statistic, based on a Poisson regression model, was employed to identify spatial clusters of unintentional pesticide-related poison center exposures. Next, logistic regression models were constructed to identify potential demographic and environmental factors associated with unintentional pesticide-related poison center exposures. There were 59,477 unintentional pesticide-related poison center exposures from 2000 to 2013. The spatial scan statistic found a change in the number of counties in the identified clusters (e.g. , aggregation of counties with higher than expected exposures) for two time periods (2000-2006; 2007-2013). Based on the logistic regression models, factors associated with unintentional pesticide-related poison center exposures were percent black or African American population, year structure built, and percent moved in the past 12 months. In conclusion, this study found certain demographic and environmental factors may be associated with unintentional pesticide-related poison center exposures. Through understanding trends and associated factors, public health professionals can design interventions for populations at higher risk of pesticide exposures. This study also supports the use of spatial methods being utilized to expand upon current analysis of poison center data. Future research should confirm and build upon these findings.

The Role of Social Support and the Neighborhood Environment on Physical Activity in Low-income, Mexican-American Women in South Texas / 예방의학회지

OBJECTIVES: To determine the relationships between physical activity (PA), the neighborhood environment support for PA, and social support for PA among Mexican-American women living in South Texas. The Enlace study was a randomized controlled trial that tested the effectiveness of a promotora-led PA intervention among low-income Mexican origin women (n=614) living in colonias. METHODS: The dependent measures included accelerometer-measured average moderate to vigorous physical activity (MVPA) and sedentary breaks and the Community Health Activities Model Program for Seniors PA 41-item questionnaire. The independent measures included the Physical Activity and Neighborhood Environment Scale (PANES) and the 13-item Physical Activity Social Support (PASS) scale. RESULTS: Enlace participants were on average 40.4 (standard deviation, 10.3) years old, born in Mexico (86.1%), and uninsured (83.1%). Adjusted linear regression results indicated that each 1-point increment in the PANES overall score was associated with 0.050 (p < 0.001) unit increase in sedentary break and a −0.043 (p=0.001) unit decrease in sedentary break duration. Both PANES (β=0.296; p=0.002) and PASS scores (β=0.076; p < 0.001) were associated with weekly average self-reported MVPA. Interaction effects were observed between PASS scores and accelerometer-measured frequency of sedentary breaks and sedentary time duration. CONCLUSIONS: The findings of this study indicate that the relationships between PA and built environment and social support are measure-dependent and suggest that reducing sedentary time in this population may require a closer assessment of social support for PA.

Beetle diversity in fragmented thornscrub and isolated trees / Diversidade de coleópteros em um fragmento do bioma thornscrub e árvores isoladas

Abstract Due to land use change mainly for induced agriculture, Tamaulipan thornscrubin northeast Mexico has been cleared and transformed into small patches of vegetation as small as isolated trees surrounded by agricultural fields. In this study, we explored how tree isolation or growing inside a fragment of remnant vegetation influence diversity of coleopterans in two plant species (Prosopis laevigata (Humb. &Bonpl.exWilld.) M.C. Johnst. (mesquite) and Ebenopsis ebano (Berl.) Barneby (Texas ebony). We found 72 coleopteran morphospecies; fifteen occurred mainly in remnant fragments and ten mainly in isolated trees. There were more insects under isolated mesquites than under those immersed in remnant fragments, while in Texas ebony the highest beetle density for isolated trees coincided with periods of bean and maize in surrounding agriculture.

Resumo Devido a mudança de uso da terra para induzir principalmente a agricultura, o bioma thornscrub no nordeste México tem sido transformado em fragmentos pequenos como árvores isoladas rodeadas por campos agrícolas. Neste estudo exploramos como o isolamento das árvores influi na diversidade de coleópteros em duas espécies de plantas (Prosopis laevigata (Humb. & Bonpl.ex Willd) M.C. Johnst. (mesquite) e Ebenopsis ebano (Berl.) Barneby (Texas ebony). Encontramos 72 morfospecies do coleópteros; quinze ocorreram principalmente em fragmentos remanescentes e dez em árvores isoladas. No estudo houve mais insetos nas “mesquite” isoladas do que nos fragmentos remanescentes do bioma thornscrub, enquanto que em “Texas ebony” a densidade alta de coleópteros para árvores isoladas coincidiu com períodos de produção de feijão e milho na agricultura ao redor.

FabAV antivenin use after copperhead snakebite: clinically indicated or knee-jerk reaction?

Abstract Background Crotalidae Polyvalent Immune Fab (Ovine) (FabAV) antivenin is commonly recommended after pit viper snakebites. Because copperhead envenomations are usually self-limited, some physicians are reluctant to use this costly treatment routinely, while others follow a more liberal approach. We hypothesized that, in practice, only patients with evidence of significant (moderate or severe) copperhead envenomation [those with snakebite severity score (SSS) > 3] receive FabAV and examined a large cohort to determine the relationship between clinical findings and FabAV administration. Methods All data from patients evaluated for copperhead snakebite at a rural tertiary referral center from 5/2002 to 10/2013 were compiled. Demographics, transfer status, antivenin use, and clinical findings were collected; SSS was calculated. The relationships among FabAV use, clinical findings, and SSS were analyzed using t-test, chi-square, and Pearson’s coefficient (p < 0.05 was significant). Results During the study period, 318 patients were treated for copperhead snakebite; 44 (13.8 %) received antivenin. Median dose was four vials (range: 1–10; IQR: 4,6). There were no deaths. Most patients receiving FabAV (63.6 %) were admitted. With regard to demographics and symptoms, only the degree of swelling (moderate vs. none/mild; p < 0.01) and bite location (hand/arm vs. leg: p < 0.0001) were associated with FabAV use. A SSS > 3, indicating moderate or severe envenomation, was only very weakly correlated with antivenin use (r = 0.217;p < 0.0001). The majority of patients with SSS > 3 (65.8 %) did not receive antivenin while most patients who did receive antivenin (70.5 %) had SSS ≤ 3 (indicating mild envenomation). Conclusions Considerable variation occurs in antivenin administration after copperhead snakebite. Use of FabAV appears poorly correlated with patients’ symptoms. This practice may expose patients to the risks of antivenin and increasing costs of medical care without improving outcomes. Guidelines used for treating other pit viper strikes, such as rattlesnake or cottonmouth snakebite may be too liberal for copperhead envenomations. Our data suggests that most patients with mild or moderate envenomation appear to do well independent of FabAV use. We suggest, for patients with copperhead snakebite, that consideration be given to withholding FabAV for those without clinical evidence of severe envenomation until prospective randomized data are available.

Binational utilization and barriers to care among Mexican American border residents with diabetes / Utilización binacional y barreras a la atención en las personas con diabetes que residen en la frontera mexicano-estadounidense

OBJECTIVE: To assess whether U.S.-Mexico border residents with diabetes 1) experience greater barriers to medical care in the United States of America versus Mexico and 2) are more likely to seek care and medication in Mexico compared to border residents without diabetes. METHODS: A stratified two-stage randomized cross-sectional health survey was conducted in 2009 - 2010 among 1 002 Mexican American households. RESULTS: Diabetes rates were high (15.4%). Of those that had diabetes, most (86%) reported comorbidities. Compared to participants without diabetes, participants with diabetes had slightly greater difficulty paying US$ 25 (P = 0.002) or US$ 100 (P = 0.016) for medical care, and experienced greater transportation and language barriers (P = 0.011 and 0.014 respectively) to care in the United States, but were more likely to have a person/place to go for medical care and receive screenings. About one quarter of participants sought care or medications in Mexico. Younger age and having lived in Mexico were associated with seeking care in Mexico, but having diabetes was not. Multiple financial barriers were independently associated with approximately threefold-increased odds of going to Mexico for medical care or medication. Language barriers were associated with seeking care in Mexico. Being confused about arrangements for medical care and the perception of not always being treated with respect by medical care providers in the United States were both associated with seeking care and medication in Mexico (odds ratios ranging from 1.70 - 2.76). CONCLUSIONS: Reporting modifiable barriers to medical care was common among all participants and slightly more common among 1) those with diabetes and 2) those who sought care in Mexico. However, these are statistically independent phenomena; persons with diabetes were not more likely to use services in Mexico. Each set of issues (barriers facing those with diabetes, barriers related to use of services in Mexico) may occur side by side, and both present opportunities for improving access to care and disease management.

OBJETIVO: Evaluar si las personas con diabetes que residen en la frontera mexicano-estadounidense 1) encuentran mayores barreras para obtener atención médica en los Estados Unidos de América que en México; y 2) acuden a México en busca de atención y medicación con mayor probabilidad que las personas no diabéticas que residen en la frontera. MÉTODOS: Durante el 2009 y el 2010, en una muestra de 1 002 hogares mexicano-estadounidenses, se llevó a cabo una encuesta transversal de salud en dos etapas, estratificada y aleatorizada. RESULTADOS: Las tasas de diabetes eran elevadas (15,4%). La mayor parte de las personas con diabetes (86%) notificaron comorbilidades. En comparación con los participantes no diabéticos, los afectados de diabetes experimentaban dificultades algo mayores para pagar US$ 25 (P = 0,002) o US$ 100 (P = 0,016) por recibir atención médica, y encontraban mayores barreras en materia de transporte e idioma (P = 0,011 y 0,014, respectivamente) para ser atendidos en los Estados Unidos, aunque era más probable que contaran con una persona o lugar adonde acudir en busca de atención médica y para ser sometidos a tamizaje. Una cuarta parte de los participantes acudían a México en busca de atención o medicamentos. Una edad menor y el haber vivido en México se asociaban con la búsqueda de atención en México, pero no el padecer diabetes. La presencia de múltiples barreras financieras se asociaba independientemente con una probabilidad aproximadamente tres veces mayor de acudir a México en busca de atención médica o medicación. Las barreras idiomáticas se asociaban con la búsqueda de atención en México. La confusión acerca de los trámites para recibir atención médica y la percepción de no recibir siempre un trato respetuoso por parte de los proveedores de atención médica en los Estados Unidos se asociaban con la búsqueda de atención y medicación en México (odds ratio, 1,70 - 2,76). CONCLUSIONES: La notificación de barreras modificables a la atención médica fue frecuente entre los participantes y algo más frecuente entre 1) las personas con diabetes; y 2) los que buscaban se atendidos en México. Sin embargo, estos fenómenos son estadísticamente independientes; no era más probable que las personas con diabetes utilizaran servicios en México. Ambos conjuntos de problemas (las barreras que deben afrontar las personas con diabetes, las barreras relacionadas con el uso de servicios en México) pueden coexistir, y proporcionan oportunidades para mejorar el acceso a la atención y el tratamiento de las enfermedades.

Effect of exercise dosages on adiposity indices in overweight girls / Efecto de programas de ejercicio en los índices de adiposidad en niñas con sobrepeso

Objective. The primary purpose of this study was to determine the impact of two exercise dosages on reducing adiposity in minority girls. Materials and methods. Sixty-two overweight Hispanic and African-American girls participated in one of two intense summer interventions in Houston, TX: Intervention A (exposure to about 40 hours physical activities) or Intervention B (exposure to 60 hours of physical activities). Adiposity indices (percent body fat, waist circumference, body mass index) were taken pre- and post-intervention. Results. Intervention B had a significantly greater decrease in adiposity indicators (p= 0.006) when compared to Intervention A. Waist circumference displayed the most significant decrease (p = 0.001). Both interventions significantly increased daily minutes of moderate-to-vigorous physical activity (p= 0.020). Conclusions. Intense physical activity interventions may effectively reduce abdominal fat in minority girls.

Objetivo. Determinar el impacto de dos programas de ejercicio en la reducción de los índices de adiposidad en niñas de grupos minoritarios. Material y métodos. Sesenta y dos niñas latinas y africano-americanas participaron en una de dos intervenciones intensivas durante el verano: la intervención A (exposición a aproximadamente 40 horas de actividad física) o la intervención B (exposición a 60 horas de actividad física) en Houston, TX. Los indicadores de adiposidad (índice de masa corporal, porcentaje de grasa corporal y grasa abdominal) se midieron antes y después de cada intervención. Resultados. La intervención B tuvo una disminución más significativa en el nivel de adiposidad (p=0.006) comparado con la intervención A. La circunferencia abdominal fue la que más disminuyó (p=0.001). Ambas intervenciones aumentaron significativamente la actividad física moderada a intensa (p=0.020). Conclusiones. Las intervenciones cortas e intensas pueden ser efectivas en la reducción de la grasa abdominal en niñas de grupos minoritarios.

Epilogue of Texas Life

No abstract available.

Epilogue of Texas Life

No abstract available.

The Emergence of the North Texas Korean American Nurses Society and its Contributions to Korean Immigrant Societies in the U.S / 간호행정학회지

PURPOSE: To describe the emergence of the North Texas Korean American Nurses Society (NTKANS) and to examine its sociocultural contributions to Korean immigrant societies in the U.S. for the last half century. METHODS: The study used retrospective historical analysis to explore the first North Texas Korean immigrant nurses' footsteps. Using Christy's historical research methodology, this study explored themes found in the NTKANS Minutes, the directories, and newspapers, and compared them with historical nursing contexts found in documents, immigrant nurse's pictures, and letters. Interviews with twenty first immigrant Korean nurses, the members, were also used as main data. RESULTS: Since its emergence in 1969, the NTKANS have contributed to local Korean societies through community medical services, financial supports to local Korean associations, local publications, and opening Korean school. In addition, the society has contributed to the other Korean immigrant nursing societies in the U.S. CONCLUSION: The sociocultural contributions NTKANS had made to Korean immigrant societies were not possible without its members' enormous efforts, personal struggles, and altruistic dedications. The trials and tribulations these immigrant nurses have overcome and the achievements they made for last half century would greatly inspire students and nurses in Korea who may seek international leadership and scholarship.

A Preliminary Study on the Development of Korean Medication Algorithm for Attention-Deficit Hyperactivity Disorder

OBJECTIVES: This study was conducted to develop a Korean algorithm of pharmacological and non-pharmacological treatment strategies in attention-deficit hyperactivity disorder (ADHD) and its specific comorbid disorders (e.g. tic disorder, depressive disorder, anxiety disorder, bipolar disorder, and oppositional defiant disorder/conduct disorder). METHODS: Based on a literature review and expert consensus, both paper- and web-based survey tools were developed with respect to a comprehensive range of questions. Most options were scored using a 9-point scale for rating the appropriateness of medical decisions. For the other options, the surveyed experts were asked to provide answers (e.g., duration of treatment, average dosage) or check boxes to indicate their preferred answers. The survey was performed on-line in a self-administered manner. Ultimately, 49 Korean child & adolescent psychiatrists, who had been considered experts in the treatment of ADHD, voluntarily completed the questionnaire. In analyzing the responses to items rated using the 9-point scale, consensus on each option was defined as a non-random distribution of scores as determined by a chi-square test. We assigned a categorical rank (first line/preferred choice, second line/alternate choice, third line/usually inappropriate) to each option based on the 95% confidence interval around the mean rating score. RESULTS: Specific medication strategies for key clinical situations in ADHD and its comorbid disorders were indicated and described. We organized the suggested algorithms of ADHD treatment mainly on the basis of the opinions of the Korean experts. The suggested algorithm was constructed according to the templates of the Texas Child & Adolescent medication algorithm Project (CMAP). CONCLUSION: We have proposed a Korean treatment algorithm for ADHD, both with and without comorbid disorders through expert consensus and a broad literature review. As the tools available for ADHD treatment evolve, this algorithm could be reorganized and modified as required to suit updated scientific and clinical research findings.

Ethnic and health correlates of diabetes-related amputations at the Texas-Mexico border / Correlatos étnicos y de salud de las amputaciones relacionadas con la diabetes en la frontera entre Texas y México

OBJECTIVE: To examine the association between diabetes-related lower-extremity amputation (LEA) and ethnicity, age, source of payment, geographic location, diabetes severity, and health condition in adults with diabetes mellitus type 2 living in border and non-border counties in Texas, United States of America, and to assess intra-border region geographic differences in post-LEA treatment. METHODS: This correlational study was based on secondary data from the 2003 Texas Inpatient Hospital Discharge Data. The sample consisted of individuals 45 years of age and older with type 2 diabetes who had undergone a nontraumatic LEA (n = 5 865). Descriptive statistics and logistic regression analyses were applied. RESULTS: The following characteristics were predictors of LEA: being Hispanic or African American, male, > 55 years old, and a Medicare or Medicaid user, and living in a border county. Persons with moderate diabetes and those who suffered from cardiovascular disease or stroke also had higher odds of undergoing an LEA. Post-LEA occupational therapy was significantly less prevalent among border residents (9.5 percent) than non-border residents (15.3 percent) (P < 0.001). CONCLUSION: Understanding the factors that influence diabetes-related LEA may lead to early detection and effective treatment of this disabling consequence of diabetes along the U.S.-Mexico border.

OBJETIVO: Analizar la asociación entre las amputaciones de extremidades inferiores (AEI) relacionadas con la diabetes y el grupo étnico, la edad, la procedencia del pago, la ubicación geográfica, la gravedad de la diabetes y el estado de salud de los adultos que padecen diabetes tipo 2 residentes en los condados fronterizos y no fronterizos de Texas (Estados Unidos de América), y evaluar la diferencias geográficas dentro de la zona fronteriza en cuanto al tratamiento posterior a la amputación. MÉTODOS: Este estudio correlacional se basó en datos secundarios procedentes de la información de egreso de pacientes hospitalizados en Texas durante el año 2003. La muestra estuvo integrada por personas de 45 años o mayores con diabetes tipo 2, que habían sido sometidas a la amputación no traumática de una extremidad inferior (n = 5 865). Se aplicaron estadística descriptiva y análisis de regresión logística. RESULTADOS: Las siguientes características constituyeron factores predictivos de AEI: ser hispano o afroestadounidense, hombre, de 55 años o mayor, beneficiario de Medicare o Medicaid, y residente en un condado fronterizo. Las personas con diabetes moderada que padecían enfermedades cardiovasculares o habían sufrido un accidente cerebrovascular también tenían una mayor probabilidad de ser sometidas a una AEI. La terapia ocupacional posterior a la amputación fue significativamente menos prevalente entre los residentes fronterizos (9,5 por ciento) que entre los no fronterizos (15,3 por ciento) (P < 0,001). CONCLUSIONES: La comprensión de los factores que influyen en las AEI relacionadas con la diabetes puede conducir a la detección temprana y el tratamiento eficaz de esta secuela discapacitante en la zona fronteriza entre los Estados Unidos y México.

Assessing the roles of temperature, precipitation, and enso in dengue re-emergence on the Texas-Mexico border region / Evaluación del clima y del ENSO en la reemergencia del dengue en la frontera Texas-México

OBJECTIVE: The goal of this study was to assess linkages between microclimate and longer-term ENSO-related weather forcing on the week-to-week changes in dengue prevalence in Matamoros, Tamaulipas, Mexico, over a recent decade of dengue observations. MATERIAL AND METHODS: An auto-regressive model to evaluate the role of climatic factors (sea-surface temperature) and weather (maximum temperature, minimum temperature, precipitation) on dengue incidence over the period 1995-2005, was developed by conducting time-series analysis. RESULTS: Dengue incidence increased by 2.6 percent (95 percent CI: 0.2-5.1) one week after every 1ºC increase in weekly maximum temperature and increased 1.9 percent (95 percent CI: -0.1-3.9) two weeks after every 1 cm increase in weekly precipitation. Every 1ºC increase in sea surface temperatures (El Niño region 3.4 ) was followed by a 19.4 percent (95 percent CI: -4.7-43.5) increase in dengue incidence (18 weeks later). CONCLUSIONS: Climate and weather factors play a small but significant role in dengue transmission in Matamoros, Mexico. This study may provide baseline information for identifying potential longer-term effects of global climate change on dengue expected in the coming decades. To our knowledge, this is the first study to investigate the potential associations between climate and weather events and dengue incidence in this geographical area.

OBJETIVO: Evaluar los vínculos entre el microclima, las variables relacionadas al fenómeno de El Niño Oscilación del Sur (ENSO) y los cambios en el reporte semanal de casos de dengue en el área de Matamoros, Tamaulipas, México, a lo largo de una década de observaciones. MATERIAL Y MÉTODOS: Se desarrolló un modelo autorregresivo para evaluar la influencia de factores climáticos (temperatura superficial del mar) y tiempo (temperatura máxima, temperatura mínima y precipitación) sobre la incidencia de dengue, a lo largo de 11 años (1995-2005), empleando análisis de series de tiempo. RESULTADOS: La incidencia de casos de dengue aumentó 2.6 por ciento una semana después de cada 1ºC de incremento en la temperatura máxima semanal (95 por ciento IC: 0.2, 5.1); observamos también que los casos de dengue aumentaron 1.9 por ciento dos semanas después de cada centímetro de incremento en la precipitación semanal (95 por ciento IC: -0.1, 3.9). Cada 1ºC de aumento en la temperatura superficial del mar en la región Niño 3.4 fue seguida, 18 semanas después, de un aumento de 19.4 por ciento en la incidencia de casos de dengue (95 por ciento IC: -4.7, 43.5). CONCLUSIONES: Los factores de clima y tiempo tienen una influencia menor, aunque significativa, sobre la transmisión del dengue en la ciudad fronteriza de Matamoros, México. Este estudio aporta información basal para identificar efectos potenciales de mayor alcance, relacionados con el cambio climático global sobre los casos esperados de dengue en las próximas décadas. Hasta donde sabemos, este es el primer estudio que evalúa las posibles asociaciones entre los eventos climáticos y tiempos y la incidencia de casos de dengue en la frontera de México con Texas.

Health-related quality of life in a binational population with diabetes at the Texas-Mexico border

OBJECTIVES: To examine physical and mental health domains of health-related quality of life (HRQL) in a binational adult population with type 2 diabetes at the Texas-Mexico border, and to explore individual and social correlates to physical and mental health status. METHODS: Adults 18 years and older with type 2 diabetes residing in the South Texas Lower Rio Grande Valley and in Reynosa, Tamaulipas, Mexico, were recruited using a convenience sampling technique and interviewed face-to-face with a structured survey. HRQL was measured using physical and mental health summary components of the Medical Outcomes Study Short Form. HRQL correlates included demographic characteristics, health factors, access to healthcare, and family support. Samples characteristics were compared using the Student’s t-test or Mann-Whitney U test. Associations between dependent and independent variables were examined using unadjusted and adjusted (multiple variable) logistic regression models. RESULTS: There were no significant differences between Valley and Reynosa respondents in physical or mental health status scores. Valley participants with lower socioeconomic status and those perceiving their supportive relative’s level of diabetes-related knowledge as "low" were more likely to report worse physical health than those lacking those characteristics. In the Reynosa group, lower physical health status was associated with duration of diabetes and insulin use. Both sample populations with clinical depressive symptoms were more likely to have worse physical and mental health than those without such symptoms. CONCLUSIONS: HRQL is an important outcome in monitoring health status. Understanding the levels and influences of HRQL in U.S.-Mexico border residents with diabetes may help improve diabetes management programs.

OBJETIVOS: Analizar los dominios de salud física y mental de la calidad de vida relacionada con la salud (CVRS) en una población binacional de adultos con diabetes tipo 2 en la frontera Texas-México y explorar los factores individuales y sociales relacionados con el estado de la salud física y mental. MÉTODOS: Se realizó un muestreo de conveniencia de personas de 18 años de edad o más con diabetes tipo 2 que vivían en Lower Rio Grande Valley, al sur de Texas, y en Reynosa, Tamaulipas, México, y se les realizó una entrevista estructurada presencial. La CVRS se midió mediante los componentes abreviados de salud física y mental del MOS-SF8 (Medical Outcomes Study Short Form 8). Entre los factores relacionados con la CVRS estaban las características demográficas, los factores de salud, el acceso a la atención sanitaria y el apoyo familiar. Se compararon las características de las muestras mediante la prueba de la t de Student o la prueba de la U de Mann-Whitney. Las asociaciones entre las variables independientes y la dependiente se analizaron mediante modelos de regresión logística múltiple, ajustados y sin ajustar. RESULTADOS: No se encontraron diferencias significativas entre los entrevistados de Valley y de Reynosa en cuanto a la puntuación del estado de salud física y mental. Los participantes de Valley con menor estatus socioeconómico y los que consideraban que los parientes que los apoyaban tenían un "bajo" nivel de conocimiento sobre la diabetes presentaron una mayor probabilidad de informar un peor estado de salud física que los que no tenían esas características. En el grupo de Reynosa, el peor estado de salud física se asoció con la duración de la diabetes y el uso de insulina. En ambos grupos, las personas con síntomas clínicos de depresión tuvieron una mayor probabilidad de informar una peor salud física y mental que los que no presentaban esos síntomas. CONCLUSIONES: La CVRS es un importante criterio en el análisis del estado...

Lecciones aprendidas: inundaciones del 2006 en la Región Paso del Norte / Lessons learned: the 2006 floods in the paso del norte region

Los diferentes capítulos de esta obra demuestran de una manera objetiva y sistematizada los aciertos y errores cometidos después de la inundación y las recomendaciones que las propias instituciones que señalaron para mejorar sus intervenciones, asimismo esperamos que se sigan produciendo otros escenarios de reflexión conjunta entre los diferentes organismos que tengan como fin preservar la integridad física y emocional del ser humano y su relación armónica con el medio ambiente.

Environmental aspects of wastewater reclamation.

The population is increasing rapidly and the demand for water by cities, industries and agriculture has tended to grow even faster than the population. Wastewater reclamation consists of a combination of conventional and advanced treatment processes employed to return a wastewater to nearly original quality, reclaiming the water. The environmental health aspects associated with reclamation of wastewater include quality aspects and public health aspects. An attempt has been made in the present paper to describe these aspects and to suggest appropriate solutions.

Screening mexicans for psychosocial and behavioral problems during pediatric consultation / Detección de problemas psicosociales y de comportamiento en población pediátrica originaria de México

Background. Psychosocial and behavioral problems should be detected early during the pediatric consultation to prevent more severe psychosocial impairment as children move into adolescence. The pediatric visit offers an excellent opportunity to assess possible problems using screening tools. The aim of this study is to assess whether an adaptation of a screening tool (Pediatric Symptom Checklist) using visual aids is valid and suitable for the early detection of psychosocial problems among a sample of Mexican children and adolescents. Methods. We included 411 of 468 (87.8%) Mexican mothers or female caretakers of children and adolescents aged 4-16 undergoing routine health assessments in two Preventive Child Health Clinical Services in El Paso, Texas, USA. Mothers or female caretakers completed the Pictorial Pediatric Symptom Checklist and a psychological comprehensive test known as the Child Behavior Checklist (CBCL). Sensitivity and specificity was established using the CBCL as criteria for the validity of the PPSC. Results. The PPSC screening tool performed well as demonstrated by its detection rates of psychosocial and behavioral problems among the sample of Mexican children. Sensitivity and specificity at the standard cut-off scores was 69.6% and 95.2% for children 4-5 years old and 61.8% and 91.8% for children 6-16 years old respectively. The results were slightly lower than those found using the PSC among other ethnic groups in the United States, with a sensitivity and specificity of 71.7% and 93.0%, respectively. Conclusions. The PPSC is a simple, effective tool that can detect on average more than 65% of the children and adolescents with possible psychosocial problems during pediatric consultations. This free screening tool detected psychosocial problems in pediatric populations of Mexican origin living on the border and may be also effective for Mexican children living in Mexico.

Antecedentes. Los problemas psicosociales y de comportamiento deben ser detectados durante la consulta pediátrica para prevenir problemas irreparables y severos cuando el niño pasa a la adolescencia. La visita pediátrica ofrece una excelente oportunidad para detectar posibles problemas utilizando "pruebas rápidas" de diagnóstico. El objetivo de este estudio es determinar la validez diagnóstica de una adaptación de una prueba rápida conocida como "Pediatric Symptom Checklist" utilizando apoyos visuales para la detección de problemas psicosociales en una muestra de niños y adolescentes mexicanos. Métodos. Se trabajó con una muestra de 411 (87.8%) madres mexicanas de niños y adolescentes de 4 a 16 años, asistiendo a servicios preventivos en dos clínicas en El Paso, Texas, Estados Unidos. Las madres completaron la adaptación de la prueba rápida "PPSC" y una prueba psicológica comprensiva conocida como el "Child Behavior Checklist". Se utilizó el método de sensibilidad y especificidad para establecer la validez diagnóstica del PPSC. Resultados. La prueba rápida del PPSC se comportó favorablemente como se muestra en los resultados de detección de problemas psicosociales y de comportamiento en la muestra de niños y adolescentes. Los puntos de corte convencionales para el PPSC dieron una sensibilidad de 69.6% y especificidad de 95.2% para los niños en edades 4 a 5 años y de 61.8% y 91.8% para las edades de 6 a 16 años, respectivamente. Los resultados cuando se comparan con los reportados en otros grupos étnicos en los Estados Unidos (sensibilidad 71.7% y especificidad 93.0%) son ligeramente menores. Conclusiones. La prueba rápida del PPSC es una herramienta sencilla y efectiva que detectó en promedio más de 65% de los niños y adolescentes con posibles problemas psicosociales durante la consulta pediátrica. Esta "prueba rápida" que es gratuita detectó problemas psicosociales en poblaciones pediátricas de origen mexicano viviendo en la frontera y puede ser efectiva para niños y adolescentes que viven en México.