Cutaneous malignant melanoma: A study of skin cancer in the United States from 1973--1997

Cutaneous malignant melanoma (CMM) is the cancer of the melanocytes, the cells that produce the pigment melanin, and is an aggressive skin cancer that is most prevalent in the white population. Although most cases of malignant melanoma are white, black and other non-white populations also develop this disease. However, the etiologic factors involved in the development of melanoma in these lower-risk populations are not well known. Generally, survival rates of malignant melanoma have been found to be lower in blacks than for whites with similar stage of disease at diagnosis. ^ This study presents an analysis of the differences in survival between black and white cases with malignant melanoma of the skin as the only or first primary cancer, found in the National Cancer Institute Surveillance, Epidemiology and End Results (SEER) cancer registry from 1973 to 1997. A total of 54,193 cases of CMM were diagnosed in black and white patients between 1973 and 1997. Black patients tended to be older, with a mean age of 64.46 years, compared to 53.14 years for white patients. Eighty-nine percent of patients were diagnosed with CMM as the only cancer. (Abstract shortened by UMI.)^

The Effect of Broadleaf Canopies on Survey-grade Horizontal GPS/GLONASS Measurements

A study was conducted to empirically determine the degradation of survey-grade GPS horizontal position measurements due to the effects of broadleaf forest canopies. The measurements were taken using GPS/GLONASS-capable receivers measuring C/A and P-codes, and carrier phase. Fourteen survey markers were chosen in central Connecticut to serve as reference markers for the study. These markers had varying degrees of sky obstruction due to overhanging tree canopies. Sky obstruction was measured by photographing the sky with a 35mm reflex camera fitted with a hemispherical lens. The negative was scanned and the image mapped using an equal- area projection to remove the distortion caused by the lens. The resulting digital image was thresholded to produce a black-and-white image in which a count of the black pixels is a measure of sky-area obstruction. The locations of the markers were determined independently before the study. During the study, each marker was occupied for four 20-minute sessions over the period of one week in mid-July, 1999. The location of the study markers produced relatively long baselines, as compared with similar studies. We compared the accuracy of GPS-only vs. GPS&GLONASS as a function of sky obstruction. Based on our results, GLONASS observations did not improve or degrade the accuracy of the position measurements. There is a loss of 2mm of accuracy per percent of sky obstruction for both GPS only and GPS&GLONASS.

Other Things Being Equal: A Paired Testing Study of Discrimination in Mortgage Lending

This article summarizes a recently completed study, funded by the U.S. Department of Housing and Urban Development (HUD) and conducted by the Urban Institute, of discrimination against black and Hispanic homebuyers when they visit mortgage lending institutions in two major metropolitan markets to make pre-application inquiries. It represents the first application of paired testing to rigorously measure discrimination in the mortgage lending process. The paired tests disclosed significant levels of adverse treatment on the basis of race and ethnicity, with African Americans and Hispanics receiving less information and assistance than comparable whites, even at this very early stage in the application process.

Homeless mortality in Harris County in 2008

Little research has been on homeless mortality, but what has been done indicates that homeless people have higher mortality rates than the general population. Homeless decedents in Harris County in 2008 who were referred to the Harris County Medical Examiner's Office (HCMEO) were described by age, race/ethnicity, sex, and marital status and compared to the homeless population as enumerated by the Coalition of the Homeless (COH) in 2007. Of the 47 decedents, eight (17%) were female and 39 (83%) were male, 24 (51.1%) were non-Hispanic white, 11 (23.4%) were black, and 12 (25.5%) were Hispanic, none of the decedents were listed as married, however, a large number (29, 61.5%) were listed as “unknown,” and the average age of decedents was 50 years, six years older than the average of 44 years in the general homeless population. Most common causes of death were injuries, which included motor vehicle accidents, homicides and suicides and poisonings, (acute overdose and chronic substance use). Homeless decedents were representative to the larger Harris County homeless population. ^

Pancreatic cancer deaths in Texas veterans

Background/objective. Several studies have found an increased risk of pancreatic cancer in veterans deployed to Vietnam during the Vietnam War. Diabetes, a known risk factor for pancreatic cancer, has been designated as a service-connected illness in deployed Vietnam veterans. The majority of Vietnam veterans, now between the ages of 55 to 65, have not yet reached the ages of pancreatic cancer’s greatest prevalence, ages 65 to 79. This case-control study utilized 1998 electronic Texas death certificate data for white, black and Hispanic men to explore the question of whether military service was a risk factor for deaths due to pancreatic cancer among men who died in 1998.^ Methods. The primary study included men born between 1927 and 1953, and was a matched case-control study with two control groups; 431 pancreatic cancer cases were birth-year and race-matched one case to two non-neoplastic death controls and, for the second control group, were matched 1:1 with 431 accidental death controls. The exposure was military service, recorded as “yes”, “no” or “unknown” on the death certificate. Conditional logistic regression was used for the data analysis. Logistic regression was used in two additional unmatched analyses to examine the same exposure, military service, within different birth cohorts, again using pancreatic cancer cases with non-neoplastic and accidental death controls.^ Results. For pancreatic cancer cases matched to non-neoplastic controls, the association with military service showed an elevated odds ratio (OR) of 1.40 (95% confidence interval [CI] 1.10-1.79); matched to accidental death controls, a similar association with military service was detected [OR=1.40 (95% CI 1.04-1.89)]. The association was not seen in all time periods and was greatest for those within a birth cohort specific for Vietnam Era service. For men born between 1946 and 1950, OR=1.90 (95% CI 1.03-3.50) for comparison with non-neoplastic controls and OR=1.91 (95% CI 0.9995-3.64) for accidental death controls. ^ Conclusion. In Texas, for men aged 44-71, who died in 1998, military service was associated with an approximately 40% increased risk for pancreatic cancer. For men ages 48-52, military service was associated with an approximately 90% increased risk for pancreatic cancer.^

Epidemiological trends of influenza A positive patients hospitalized at St. Luke's Episcopal Hospital, Houston, Texas September, 2009--January, 2010

This study was a descriptive analysis of 437 influenza A positive inpatients and outpatients during the five month period between September, 2009 and January, 2010. The objective of the study was to describe the epidemiological trends of the total influenza A positive population and more specifically the clinical features of patients hospitalized with influenza A at St. Luke's Episcopal Hospital in Houston, Texas from September 2009 through January 2010. Eligible cases were included if they tested positive for influenza A test using the rapid antigen test and/or rRT-PCR. Hospitalized cases were included based on the laboratory confirmation of influenza A as well as hospital admission for at least 24 hours. Data was collected from medical record abstraction and included patient demographics, clinical history and history of chronic disease. Clinical findings in the differential diagnosis that led to laboratory-confirmation of influenza A as well as course of treatment during the hospital admission were summarized. Finally, co-morbid conditions charted during the hospital visit were reviewed and evaluated for associations with influenza A complications. During the study period, forty-eight patients were included in the study of which 27 tested positive for the H1N1 subtype. Females were more likely to be hospitalized than men. The median age of all patients admitted to St. Luke's Episcopal Hospital with influenza A was 42. The distribution for admitted cases was 15 White, 15 Black, and 18 Hispanic. Patients with co-morbid disease constituted 81% of the admissions for Influenza A. The presence of an underlying medical condition remains a risk factor for both seasonal and H1N1 influenza. Although respiratory conditions such as asthma and COPD are commonly associated with complications of seasonal influenza, patients with metabolic disorders such as kidney disease and/or diabetes were admitted more frequently (58%) during the study period. The patients in the study also of a much younger age than the age that is usually associated with complications of influenza infection, i.e. no patients greater than 65 years of age were admitted with a diagnosis of influenza A. Lower infection rates among elderly populations were similarly reported in other studies of influenza during the same time period. Older patient populations may benefit from antibodies to previous H1N1 strains that have circulated during the twentieth century, whereas younger age groups lack these exposures.^

A survey of statural changes with age in the adult population of the United States

A study of the patterns of height loss with age in the Anglo, black, and Mexican-American populations of the United States has been undertaken. The study was based on data gathered by the United States Public Health Service in the Second National Health and Nutrition Examination Survey and the Hispanic Health and Nutrition Examination Survey. Estimates of height loss were obtained by subtracting present stature from a calculated maximum attained height derived from sex- and race/ethnic-specific regression equations relating stature to subischial length. Anglo women have greater height losses than Anglo, black, or Mexican-American males, and black or Mexican-American females. Between 24 and 74 years of age, Anglo women average 3.8 cm. loss in stature. The black populations lose less height than Anglos or Mexican-Americans. Mexican-Americans lose less height than Anglos from 24 to 54 years and then have a greatly increased height loss so that by age 74 their total height loss is the same as Anglos. Standing height, sitting height, body mass index, and the Poverty Index were found to be negatively correlated with height loss. Age was positively correlated to height loss. The most important determinants of the magnitude of height loss with age were sex and ethnicity. ^

(Table 2) Organic residue at DSDP Hole 76-534A

The kind, sedimentation rate, and diagenesis of organic particles delivered to the North Atlantic seafloor during the Middle Jurassic-Early Cretaceous were responsible for the presence of carbonaceous sediments in Hole 534A. Organic-rich black clays formed from the rapid supply of organic matter; this organic matter was composed of either abundant, well-preserved, and poorly sorted particles of land plants deposited in clays and silty clays within terrigenous turbiditic sequences (tracheal facies) or abundant amorphous debris (xenomorphic facies) generated through the digestive tracts of marine zooplankton and sedimented as fecal pellets. Evidence for the fecal-pellet origin of xenomorphic debris is illustrated. Black clays were also produced in sediments containing less organic matter as a result of the black color of carbonized particles composing all or most of the residues (micrinitic facies). Slowly sedimented hematitic Aptian clays contain very little carbonized, organic debris that survived diagenetic oxidation. In the red calcareous clay sequence of the Late Jurassic, larger amounts of this oxidized debris turned several clay layers black or blackish red. Carbonized debris also dominates the residues recovered in interbedded black and green Albian clays. Carbonization of organic matter in these sediments either turned them black or provided the diagenetic environment for reduced iron. Carbonized debris is also appreciable in burrow-mottled black-green Kimmeridgian clay. The study of Hole 534A organic matter indicates that during the middle Callovian there was a rapid supply of terrigenous organic matter, followed by a late Callovian episode of rapidly supplied xenomorphic debris deposited as fecal pellets. The Late Jurassic-Berriasian was a time of slower sedimentation of organic matter, primarily of a marine dinoflagellate flora in a poorly preserved xenomorphic facies variously affected by diagenetic oxidation. Several intervals of carbonized tracheal tissue in the Oxfordian and Kimmeridgian suggest episodes of oxidized terrigenous matter. The same sequence of Callovian organic events is evident in much of the Early Cretaceous

Las misiones jesuitas en la región del Guayrá en las primeras décadas del siglo XVII

Las misiones jesuitas en el espacio de la cuenca del Plata son bastante conocidas en la historiográfica nacional. Desde la relación geográfica de Azara hasta los últimos aportes de Di Stefano y Zanatta en su "Historia de la Iglesia Argentina ", la historia de los "30 pueblos" en la provincia argentina de Misiones ha dado mucho que hablar -y escribir- a lo largo de la historia nacional. Esto es perceptible tanto en las imágenes idílicas de comunión entre jesuitas y guaraníes hasta los trabajos que develan los complejos sistemas de alianzas que posibilitaban la aparente sumisión guaraní al dominio español. Pero todas estas imágenes deben considerarse como el estado final de un proceso que -con sus marchas y contramarchas- se inicia a principios del siglo XVII, cuando los jesuitas comienzan su tarea evangelizadora con los indígenas. Será nuestra intención trabajar las dos primeras décadas de la fundación y funcionamiento de las misiones jesuitas en el Guayrá (1609-1629), momento en el cual van tomando forma las estrategias y estructuras de dominación, cuando la metodología de la prueba y error es moneda corriente, y los enfrentamientos entre indígenas, jesuitas, españoles y portugueses tienen lugar en el marco de una frontera tan inestable como era en ese momento la región guayrense.

Las misiones jesuitas en la región del Guayrá en las primeras décadas del siglo XVII

Las misiones jesuitas en el espacio de la cuenca del Plata son bastante conocidas en la historiográfica nacional. Desde la relación geográfica de Azara hasta los últimos aportes de Di Stefano y Zanatta en su "Historia de la Iglesia Argentina ", la historia de los "30 pueblos" en la provincia argentina de Misiones ha dado mucho que hablar -y escribir- a lo largo de la historia nacional. Esto es perceptible tanto en las imágenes idílicas de comunión entre jesuitas y guaraníes hasta los trabajos que develan los complejos sistemas de alianzas que posibilitaban la aparente sumisión guaraní al dominio español. Pero todas estas imágenes deben considerarse como el estado final de un proceso que -con sus marchas y contramarchas- se inicia a principios del siglo XVII, cuando los jesuitas comienzan su tarea evangelizadora con los indígenas. Será nuestra intención trabajar las dos primeras décadas de la fundación y funcionamiento de las misiones jesuitas en el Guayrá (1609-1629), momento en el cual van tomando forma las estrategias y estructuras de dominación, cuando la metodología de la prueba y error es moneda corriente, y los enfrentamientos entre indígenas, jesuitas, españoles y portugueses tienen lugar en el marco de una frontera tan inestable como era en ese momento la región guayrense.

Las misiones jesuitas en la región del Guayrá en las primeras décadas del siglo XVII

Las misiones jesuitas en el espacio de la cuenca del Plata son bastante conocidas en la historiográfica nacional. Desde la relación geográfica de Azara hasta los últimos aportes de Di Stefano y Zanatta en su "Historia de la Iglesia Argentina ", la historia de los "30 pueblos" en la provincia argentina de Misiones ha dado mucho que hablar -y escribir- a lo largo de la historia nacional. Esto es perceptible tanto en las imágenes idílicas de comunión entre jesuitas y guaraníes hasta los trabajos que develan los complejos sistemas de alianzas que posibilitaban la aparente sumisión guaraní al dominio español. Pero todas estas imágenes deben considerarse como el estado final de un proceso que -con sus marchas y contramarchas- se inicia a principios del siglo XVII, cuando los jesuitas comienzan su tarea evangelizadora con los indígenas. Será nuestra intención trabajar las dos primeras décadas de la fundación y funcionamiento de las misiones jesuitas en el Guayrá (1609-1629), momento en el cual van tomando forma las estrategias y estructuras de dominación, cuando la metodología de la prueba y error es moneda corriente, y los enfrentamientos entre indígenas, jesuitas, españoles y portugueses tienen lugar en el marco de una frontera tan inestable como era en ese momento la región guayrense.