"Safe Foods" or "Fear Foods": the implications of food avoidance in college students from low- and middle-income countries.

PURPOSE: The primary objective of this study was to explore if self-reported food avoidance (fats, carbohydrates and protein) exists among college students in low- and middle-income countries (LMICs) and its relationship with body mass index (BMI), dieting, mood/anxiety symptoms, physical activities and general health knowledge. METHODS: This study is a subset (N = 6096) of a larger 26 LMICs cross-sectional survey, which consisted of 21,007 college students. We ascertained socio-demographic information, food avoidance, physical activities, dieting behaviours, depressive and PTSD symptoms, and recorded anthropometric measurements. Chi-square analyses assessed the relationship between predictor variables and food categories eliminated from participants' diet. Multiple logistic regression assessed if food avoidance predicts outcome variables such as binge drinking, high physical activity, being underweight, exhibiting significant depressive and PTSD symptoms. RESULTS: Food avoidance exists in as many as one-third of college students in low- and middle-income countries, with this being more likely in persons who are trying to lose weight whether by dieting or otherwise. Food avoidance was associated with higher BMI, depressive symptoms, and high intensity exercises, as well as the level of health knowledge influencing the types of food avoided. A significant difference was noted between lower middle-income and upper middle-income countries with respect to the foods they avoided. CONCLUSION: Despite being knowledgeable about health-related behaviours, we found that college students in our sample were not that different from those in developed countries and may be influenced by a similar advice given by non-experts about macronutrients. These results hold implications for intervention programmes and policy makers. LEVEL OF EVIDENCE: Level V, descriptive cross-sectional survey.

Disordered eating behaviours and attitudes in Jamaican adolescents: does the media play a role?

OBJECTIVE: The purpose of this study was to identify the prevalence of disordered eating behaviours and attitudes in Jamaican high school students and to determine the impact of media exposure. DESIGN AND METHODS: A cross-sectional survey of 524 Jamaican adolescents aged 11-19 years, identified using stratified random sampling, was conducted. Data was collected on sociodemographic factors, eating behaviours and attitudes (Eating Attitudes Test: EAT-26) self-esteem and media influence and anthropometric measurements were taken. Descriptive and inferential statistical analyses were performed at the 5% significance level. RESULTS: Most participants were normal weight (n=385, 76.7%) and males had lower mean body mass index (BMI) than females (females 20.7 ñ 4.2, males 19.4 ñ 3.2; p<0.01) with more females being overweight or obese (females n=46, 16.2%; males 21, 9.6%; p<0.05). Females had higher mean EAT-26 scores than males (females 15.0 ñ9.3, males 12.4 ñ 9.4; p<0.01). The mean media impact score (MIS) was higher in females (females 22.6, CI 21.7, 23.4; males 21.0, CI 20.1, 21.9; p=0.02) and in late adolescence (early adolescence 21.0, CI 20.1, 21.9, late adolescence 22.6, CI 21.7, 23.5; p=0.01). The MIS correlated positively with the EAT 26 score (p<0.001), the negative affect score (p<0.05) and BMI (p<0.05) and negatively with the self-esteem score (p<0.05). CONCLUSION: One in 5 Jamaican adolescents were deemed at risk of developing an eating disorder with an increasing prevalence of more severe disordered eating behaviours such as self-induced vomiting. There is a positive relationship between media influence and disordered eating behaviours and negative affect and a negative relationship with self-esteem.

SU-E-T-222: How to Define and Manage Quality Metrics in Radiation Oncology.

PURPOSE: Since the 2001 IOM Report Crossing the Quality Chasm: A New Health System for the 21st Century, the need to provide quality metrics in health care has increased. Quality metrics have yet to be defined for the field of radiation oncology. This study represents one institutes initial efforts defining and measuring quality metrics using our electronic medical record and verify system(EMR) as a primary data collection tool. This effort began by selecting meaningful quality metrics rooted in the IOM definition of quality (safe, timely, efficient, effective, equitable and patient-centered care) that were also measurable targets based on current data input and workflow. METHODS: Elekta MOSAIQ 2.30.04D1 was used to generate reports on the number of Special Physics Consults(SPC) charged as a surrogate for treatment complexity, daily patient time in department(DTP) as a measure of efficiency and timeliness, and time from CT-simulation to first LINAC appointment(STL). The number of IMRT QAs delivered in the department was also analyzed to assess complexity. RESULTS: Although initial MOSAIQ reports were easily generated, the data needed to be assessed and adjusted for outliers. Patients with delays outside of radiation oncology such as chemotherapy or surgery were excluded from STL data. We found an average STL of six days for all CT-simulated patients and an average DTP of 52 minutes total time, with 23 minutes in the LINAC vault. Annually, 7.3% of all patient require additional physics support indicated by SPC. CONCLUSIONS: Utilizing our EMR, an entire year's worth of useful data characterizing our clinical experience was analyzed in less than one day. Having baseline quality metrics is necessary to improve patient care. Future plans include dissecting this data into more specific categories such as IMRT DTP, workflow timing following CT-simulation, beam-on hours, chart review outcomes, and dosimetric quality indicators.

SU-E-T-540: Evaluation of Forced-Density Corrected Dose Calculation for Lung Cancer Treatment.

PURPOSE: The study was aimed to evaluate the accuracy of lung cancer treatment dose calculations using a bulk electron density for forced-density correction, in situations where CT images are acquired in other institutions and the information of CT number to electron density (CT-to-ED) conversion is unavailable for conducting pixel density correction. METHODS: Eleven 3D SBRT lung cases were studied. Treatment plans were generated initially with pixel-density correction using a known CT-to-ED conversion, in a CMS XIO treatment planning system using superposition algorithm. The plans were re-calculated with contour-based density correction, i.e., forced-density correction: a density of 0.26 g/cm3 was assigned to lung structures, which was a population average taken from a literature, and unit density was assigned to other structures. Monitor units were kept the same in both plans. RESULTS: The doses calculated using forced-density correction were compared against those calculated using pixel-density correction. The absolute percentage differences of PTV D95, PTV mean dose, and V20, among the 11 cases, were 2.49±1.69%, 1.69±1.5%, and 1.88±2.36%, respectively. CONCLUSIONS: The results showed that the dose calculation using the bulk density and forced density correction generated dose distributions close to those calculated using pixel-density correction and actual CT-to-ED conversion. None.

Vertebral augmentation treatment of painful osteoporotic compression fractures with the Kiva VCF Treatment System.

BACKGROUND: Vertebral compression fractures (VCFs) can cause significant pain and functional impairment, and their cumulative effect can lead to progressive morbidity. This single-arm, prospective feasibility trial, conducted at 4 clinical sites, was undertaken to evaluate the clinical outcomes associated with the use of an innovative vertebral augmentation device, the Kiva VCF Treatment System (Benvenue Medical, Santa Clara, California), in the management of symptomatic VCFs associated with osteoporosis. METHODS: Vertebral augmentation treatment was performed for persistent back pain symptoms in 57 patients (mean age, 71.9 ± 10.4 years), including 46 women, with radiologically confirmed VCFs; 36 of these patients (63%) had reached 12 months of follow-up at this data analysis. There were 51 one-level cases, 5 two-level cases, and 1 three-level case, representing 64 treated levels. Back pain severity and condition-specific functional impairment were evaluated with a standard 100-mm visual analog scale and the Oswestry Disability Index (ODI), respectively, before device implantation as well as at 6 weeks, 3 months, and 12 months. RESULTS: Marked clinical improvements were realized in back pain severity and functional impairment through 12 months of follow-up. The mean back pain score on the visual analog scale improved from 79.3 ± 17.2 before treatment to 21.9 ± 21.3, 21.9 ± 24.6, and 23.2 ± 23.3 at 6 weeks, 3 months, and 12 months, respectively. The mean decrease at 12 months was 49.9 ± 30.3 mm, or approximately 66% (P < .0001). Similarly, the mean ODI score improved from 68.1% ± 16.9% before treatment to 27.4% ± 17.2%, 23.8% ± 18.7%, and 23.3% ± 15.5% at 6 weeks, 3 months, and 12 months, respectively, representing a mean change of 39.2 ± 19.6 percentage points, or approximately 63%, at 12 months. Overall clinical success rates based on a 30% improvement in pain severity or greater and maintenance or improvement in the ODI were 91%, 88%, and 89% at 6 weeks, 3 months, and 12 months, respectively. The vertebral augmentation procedure required injection of a mean of 2.2 ± 0.12 mL of cement per vertebral body. There were 5 levels (8%) where cement extravasation was identified radiographically, and none were related to clinical symptoms. CONCLUSIONS: These pilot findings are encouraging, suggesting robust and durable clinical improvement after this novel vertebral augmentation procedure in patients with painful VCFs.

Clinical manifestations of adolescents with HIV/AIDS in Jamaica / Manifestaciones clínicas de los adolescentes infectados por el VIH en Jamaica

OBJECTIVE: To characterize the clinicopathological manifestations and outcomes of a cohort of HIV-infected Jamaican adolescents. METHODS: This is a retrospective cohort study to determine demographic, clinical, immunological characteristics, antiretroviral uptake and mortality in 94 adolescents aged 10-19 years followed in the Kingston Paediatric and Perinatal HIV/AIDS Programme (KPAIDS) between September 2002 and May 2007. Parametric and non-parametric tests are used to compare variables. RESULTS: The median age at initial presentation was 10.0 years (interquartile range (IQR) 7.0-12.0 years), 54.3% (51) were female (p = 0.024), transmission was primarily mother-to-child (70, 73.4%), with 87% (61) of the latter presenting as slow progressors. Sexual transmission accounted for 19.1% and there was significant female predominance (n = 15; p = 0.024). At most recent visit, perinatally infected adolescents were more likely (p < 0.0001) to reside with a non-parent (n = 42) than a biological parent (n = 19) and most had Centers for Disease Control and Prevention (CDC) category C (35/50%) disease, whereas the majority of non-perinatally infected children were classified CDC category A. Mean z scores for height-for-age was -1.47 ± 1.21 (n = 77), weight-for-age -1.06 ± 1.44 (n = 80) and BMI-for-age -0.34 ± 1.21 (n = 76) respectively; females (n = 41) were taller than males (n = 36) at their current height (p = 0.031). Lymphadenopathy (82%), dermatitis (72.0%), hepatomegaly (48%) and parotitis (48%) were the most common clinical manifestations, with significant predilection for lymphadenopathy (p # 0.0001), dermatitis (p = 0.010), splenomegaly (p = 0.008), hepatomegaly (p = 0.001) and parotitis (p = 0.007) among perinatally infected children. Median baseline CD4+ cell count was 256.0/µL (IQR 71.0 - 478.0 cells/µL); median most recent CD4+ cell count was 521/µL (IQR 271.0 - 911.0 cells/µL). Seventy-six per cent (n = 71) were initiated with highly active antiretroviral therapy (HAART) and 62 (87.3%) were currently receiving first-line therapy. Six behaviourally infected females became pregnant, resulting in five live births. There were seven deaths (7.4%). CONCLUSIONS: This study comprehensively characterizes HIV infection among perinatally infected teens with predominantly slow-progressor disease and an increasing population of sexually-infected adolescents. As the cohort transitions to adulthood, adolescent developmental, mental health and life planning issues must be emergently addressed.

OBJETIVO: Caracterizar las manifestaciones clínico-patológicas y la evolución clínica de una cohorte de adolescentes jamaicanos infectados por el VIH. MÉTODOS: El presente es un estudio de cohorte retrospectivo con el fin de determinar las características demográficas, clínicas, inmunológicas, así como el consumo de antiretrovirales y la mortalidad en 94 adolescentes de 10 a 19 años de edad, llevado a cabo como parte del Programa VIH/SIDA perinatal y pediátrico de Kingston (KPAIDS) entre septiembre de 2002 y mayo de 2007. Se usan pruebas paramétricas y no paramétricas para comparar las variables. RESULTADOS: La edad mediana en la presentación inicial fue 10.0 años (rango intercuartil (IQR) 7.0-12.0 años), 54.3% (51) eran hembras (p = 0.024), la transmisión fue fundamentalmente de madre a hijo (70, 73.4%), presentándose el 87% (61) de los últimos como progresores lentos. La transmisión sexual representó el 19.1% y hubo un predominio significativo de las hembras (n = 15; p = 0.024). En la visita más reciente, los adolescentes infectados perinatalmente presentaron una mayor probabilidad (p < 0.0001) de residir con personas distintas de sus padres (n = 42) que con un progenitor biológico (n = 19), y la mayor parte tenía la enfermedad categoría C (35/50%) de acuerdo con los Centros para el Control y la Prevención de las Enfermedades (CCPE), mientras que la mayoría de los niños infectados no perinatalmente fueron clasificados con la categoría A del CCE. Las puntuaciones z medias para altura por edad fue - 1.47 ± 1.21 (n = 77), peso por edad -1.06 ± 1.44 (n = 80), y el IMC por edad -0.34 ± 1.21 (n = 76) respectivamente; las hembras (n = 41) fueron más altas que los varones (n = 36) en altura corriente (p = 0.031). La linfadenopatía (82%), la dermatitis (72.0%), la hepato-megalia (48%) y la parotitis (48%) fueron las manifestaciones clínicas más comunes, con predilección significativa de la linfadenopatía (p # 0.0001), la dermatitis (p = 0.010), la esplenomegalia (p = 0.008), la hepatomegalia (p = 0.001) y la parotitis (p = 0.007) entre los niños perinatalmente infectados. La mediana de la línea de base del conteo celular CD4+ fue 256.0/µL (IQR 71.0 - 478.0 células/µL); la mediana del conteo celular CD4+ más reciente fue 521 /µL (IQR 271.0 - 911.0 células/µL). El setenta y seis por ciento (n = 71) fueron iniciadas con terapia antiretroviral altamente activa (TARAA) y 62 (87.3%) estuvieron corrientemente recibiendo terapia de primera línea. Seis hembras infectadas conductualmente fueron embarazadas, produciéndose como resultado cinco nacimientos. Hubo siete muertes (7.4%). CONCLUSIÓN: Este estudio presenta una caracterización integral de la infección por VIH entre adolescentes infectados perinatalmente predominantemente con la enfermedad de progresores lentos, y una población creciente de adolescentes infectados sexualmente. En la medida en que la cohorte transita a la adultez, el desarrollo del adolescente, la salud mental y los problemas de la planificación de la vida tienen que ser abordados con urgencia.

Clinical manifestations of adolescents with HIV/AIDS in Jamaica.

OBJECTIVE: To characterize the clinicopathological manifestations and outcomes of a cohort of HIV-infected Jamaican adolescents. METHODS: This is a retrospective cohort study to determine demographic, clinical, immunological characteristics, antiretroviral uptake and mortality in 94 adolescents aged 10-19 years followed in the Kingston Paediatric and Perinatal HIV/AIDS Programme (KPAIDS) between September 2002 and May 2007. Parametric and non-parametric tests are used to compare variables. RESULTS: The median age at initial presentation was 10.0 years (interquartile range (IQR) 7.0-12.0 years), 54.3% (51) were female (p = 0.024), transmission was primarily mother-to-child (70, 73.4%), with 87% (61) of the latter presenting as slow progressors. Sexual transmission accounted for 19.1% and there was significant female predominance (n=15; p = 0.024). At most recent visit, perinatally infected adolescents were more likely (p < 0.0001) to reside with a non-parent (n=42) than a biological parent (n=19) and most had Centers for Disease Control and Prevention (CDC) category C (35/50%) disease, whereas the majority of non-perinatally infected children were classified CDC category A. Mean z scores for height-for-age was -1.47 +/- 1.21 (n=77), weight-for-age -1.06 +/- 1.44 (n=80) and BMI-for-age -0.34 +/- 1.21 (n=76) respectively; females (n=41) were taller than males (n=36) at their current height (p = 0.031). Lymphadenopathy (82%), dermatitis (72.0%), hepatomegaly (48%) and parotitis (48%) were the most common clinical manifestations, with significant predilection for lymphadenopathy (p < or = 0.0001), dermatitis (p = 0.010), splenomegaly (p = 0.008), hepatomegaly (p = 0.001) and parotitis (p = 0.007) among perinatally infected children. Median baseline CD4+ cell count was 256.0/microL (IQR 71.0 - 478.0 cells/microL); median most recent CD4+ cell count was 521/microL (IQR 271.0 - 911.0 cells/microL). Seventy-six per cent (n=71) were initiated with highly active antiretroviral therapy (HAART) and 62 (87.3%) were currently receiving first-line therapy. Six behaviourally infected females became pregnant, resulting in five live births. There were seven deaths (7.4%). CONCLUSION: This study comprehensively characterizes HIV infection among perinatally infected teens with predominantly slow-progressor disease and an increasing population of sexually-infected adolescents. As the cohort transitions to adulthood, adolescent developmental, mental health and life planning issues must be urgently addressed.

Vision screening in Jamaican children

OBJECTIVE: To determine the prevalence of vision impairment in Jamaican pre-school children. METHODS: A national sample of Jamaican children at the end of the pre-school years was identified using the quarterly Jamaican Labour Force Survey. Each year, this survey identifies 500 pre-school children (1 percent of the national population) using a two-stage stratified random sampling process based on electoral divisions. Over two successive years, a 1 percent and a 0.5 percent sample of children were identified (n=750). A total of 302 children had their distance and near visual acuity assessed. Information on socio-economic status and the parental perception of children's vision was obtained by parental interview. RESULTS: 10.4 Percent of the children were identified as being in need of further ophthalmological referral using the American Academy Screening Guidelines. 4.1 percent of the children were diagnosed as having "low vision" according to the World Health Organization classification. 45.8 percent of the children were unable to identify letters and required lap-card use for evaluation of vision. No gender or socioeconomic differences were identified between those children requiring further ophthalmological assessment and those who did not (p<0.05). Parental perception of children's visual impairment was shown to be an unsatisfactory tool to assist in determining children at high risk for vision impairment. CONCLUSION: Based on the rates of children requiring further ophthalmological evaluation and the rates of low vision identified in this study, the abscence of identifiable risk factors and the inaccuracy of parental perception, all Jamaican pre-school children should be offered vision screening. The inability to identify letters demands that screening programmes must have facilities available for using lap-cards. (AU)

Should doctors inform terminally ill patients? The opinions of nationals and doctors in the United Arab Emirates.

OBJECTIVES: To study the opinions of nationals (Emiratis) and doctors practising in the United Arab Emirates (UAE) with regard to informing terminally ill patients. DESIGN: Structured questionnaires administered during January 1995. SETTING: The UAE, a federation of small, rich, developing Arabian Gulf states. PARTICIPANTS: Convenience samples of 100 Emiratis (minimum age 15 years) and of 50 doctors practising in government hospitals and clinics. RESULTS: Doctors emerged as consistently less in favour of informing than the Emiratis were, whether the patient was described as almost certain to die during the next six months or as having a 50% chance of surviving, and even when it was specified that the patient was requesting information. In the latter situation, a third of doctors maintained that the patient should not be told. Increasing survival odds reduced the number of doctors selecting to inform; but it had no significant impact on Emiratis' choices. When Emiratis were asked whether they would personally want to be informed if they had only a short time to live, less than half responded in the way they had done to the in principle question. CONCLUSIONS: The doctors' responses are of concern because of the lack of reference to ethical principles or dilemmas, the disregard of patients' wishes and dependency on survival odds. The heterogeneity of Emiratis' responses calls into question the usefulness of invoking norms to explain inter-society differences. In the current study, people's in principle choices did not provide a useful guide to how they said they would personally wish to be treated.

Lymphoreticular and myeloid pathogenesis of Venezuelan equine encephalitis in hamsters.

Ultrastructural, histopathologic, and virologic studies of adult hamsters infected with virulent Venezuelan equine encelphalomyelitis (VEE) virus (Subtype I-B) demonstrated precise chronologic and topographic progression of lesions and viral replication in extraneural sites. Thymus contained the earliest lesions and the highest initial and subsequent viral titers. No particular cytotropism was observed as highly efficient viral replication and severe cytonecrosis proceded. Early cortical necrosis of splenic periarteriolar lymphocytic sheath was followed by lymphoblastoid repopulation of the peripheral zone. Massive bone marrow necrosis was accompained by ultrastructural evidence of VEE viral particle production in reticulum cells, rubricytes, myeloid cells, lymphoblastoid cells, and megakaryocytes. Speed, efficiency, destructiveness, and relative sensitivity of virtually all lymphoreticular and hematopoetic cells were hallmarks of virulent VEE infection in the hamster.

Murine oncornavirus activation in the pancreas during infection with Venezuelan equine encephalitis virus.

Electron microscopic studies of the pancreases of 3-week-old ICR Swiss mice infected with Venezuelan equine encephalitis virus and killed 6 days post inoculation (at which time they were moribund) indicated significantly more type-C particles than were found in uninfected controls. This phenomenon was apparently possible because of the microanatomy of the pancreas, in which interstital spaces allowed accumulation of virus particles.