Leveraging Curvature on N-Doped Carbon Materials for Hydrogen Storage.

Carbon sorbent materials have shown great promise for solid-state hydrogen (H2) storage. Modification of these materials with nitrogen (N) dopants has been undertaken to develop materials that can store H2 at ambient temperatures. In this work density functional theory (DFT) calculations are used to systematically probe the influence of curvature on the stability and activity of undoped and N-doped carbon materials toward H binding. Specifically, four models of carbon materials are used: graphene, [5,5] carbon nanotube, [5,5] D5d-C120, and C60, to extract and correlate the thermodynamic properties of active sites with varying degrees of sp2 hybridization (curvature). From the calculations and analysis, it is found that graphitic N-doping is thermodynamically favored on more pyramidal sites with increased curvature. In contrast, it is found that the hydrogen binding energy is weakly affected by curvature and is dominated by electronic effects induced by N-doping. These findings highlight the importance of modulating the heteroatom doping configuration and the lattice topology when developing materials for H2 storage.

A customized table-top aging simulation exercise to augment gerodontology teaching.

While aging simulation suits have been used in healthcare education to promote empathy for older adults, little has been published on learning outcomes specific to geriatric dental patients. We designed a seminar utilising a customised ageing simulation suit to help dental students empathise with several disabilties their older adult patients may face.

Dentists' perspectives on structural and system barriers hindering oral healthcare provision in residential care facilities.

OBJECTIVES: Oral healthcare service is not well integrated with existing healthcare policy in nursing homes (NHs) globally. This qualitative study aimed to identify dentists' perspectives on structural and system barriers that hinder oral healthcare (OHC) provision to seniors in NHs in Singapore and to understand the consequences of these barriers. METHODS: Nineteen dentists (8 males and 11 females, 36.0 [IQR: 32.0-48.5] years old) were recruited through combination of purposive and snowball sampling. Four focus group discussions were conducted via teleconferencing, and each discussion had 4-5 anonymised participants. Sessions lasted 90-120 min and were audio-recorded and transcribed verbatim. Thematic analysis was conducted on data collected using NVivo software (Version12, QRS International). RESULTS: Participants agreed that the current OHC system for seniors in NHs is not well developed. The challenges dentists faced were categorised in three themes: [1] general oral healthcare system level; [2] local nursing home setting level; and [3] geriatric oral healthcare education level. These challenges are complexly intertwined and have contributed to several consequences such as a shortage of dentists in NHs and their diminished motivation to serve. It has also limited the quality of dental service they are able to provide in NHs, contributing to the current poor access of dental services for seniors in NHs. CONCLUSIONS: Dentists in Singapore face many structural and systemic barriers in providing OHC to seniors in NHs, some of which are unique to the local context. Newfound understanding of these barriers and its consequences will be helpful in developing strategic approaches to overcome these challenges.

Acceptance of silver diamine fluoride use in community dwelling older adults, nursing home residents, and caregivers.

OBJECTIVES: To compare the level of acceptance of silver diamine fluoride (SDF) treatment between different functional groups of older adults aged 65-years-old and above. METHODS: Three groups were recruited representing functionally-independent ("Community dwelling"), frail ("Nursing home"), and functionally-dependent older adults ("Caregiver": proxy respondent involved in caring for an older adult of all functional levels). Participants viewed a video on SDF and an interviewer-led questionnaire collected demographics, dental experience and perception on SDF use. RESULTS: The study recruited 201 participants (100 "Community dwelling", 51 "Nursing home", 50 "Caregiver"). Overall, 73 % of participants were accepting of SDF treatment. Those in the "Community dwelling" group were most accepting (85 %), followed by the "Nursing home" group (61 %) and "Caregiver" group (60 %) (p<0.001). Participants were more accepting of SDF use on posterior (73 %) compared to anterior teeth (46 %). They were more accepting when SDF was presented as a treatment to avoid infection and pain (87 %), and general anesthesia (78 %). In a regression analysis, "Nursing home" and "Caregiver" participants were three times less likely to accept SDF (OR 0.27 [95 % CI: 0.13 to 0.60], and OR 0.27 [95 % CI: 0.12 to 0.58] respectively) compared to "Community dwelling" participants. After adjusting for other factors, only the "Caregiver" group remained significant (Adjusted OR 0.32 [95 % CI: 0.13 to 0.78]). CONCLUSIONS: Older adults were accepting of SDF and this treatment modality has the potential to be a routine treatment option in dental caries management in this population. However, this was less certain among frail and functionally dependent older adults. CLINICAL SIGNIFICANCE: An SDF program to manage caries is likely to be well-received by functionally-independent older adults. However, the acceptance among frail and functionally-dependent older adults were lower even though SDF is mostly likely to benefit these populations. There is a need to investigate this relatively lower levels of acceptance.

Impact of income and financial subsidies on oral health care utilization among persons with disabilities in Singapore.

BACKGROUND/AIM(S): Globally, studies have shown that the dental disease burden among persons with intellectual and/or developmental disabilities (IDD) is high and can be attributed to lower utilization levels of dental services. The aim of the study was to assess the influence of income and financial subsidies on the utilization of dental care services among persons with IDD in Singapore. METHODS: Between August 2020 and August 2021, a cross-sectional study was conducted via centres offering Early Intervention Programme for Infants and Children, special education schools and adult associations in Singapore serving persons with IDD. A sample of 591 caregivers of children and adults with IDD completed the survey. Data on sociodemographic information, oral health behaviours and dental utilization were collected. Financial subsidy status was assessed by the uptake of a government-funded, opt-in Community Health Assist Scheme (CHAS) for low-income families that provided a fixed subsidy amount for dental services in the primary care setting. Statistical analysis was carried out using univariable, multiple logistic regression and modified Poisson regression. Propensity score matching was carried out in R version 4.0.2 to assess the impact of financial subsidies on oral health care utilization among persons with IDD. RESULTS: Compared to those with lower gross monthly household incomes, the adjusted prevalence ratios of having at least one dental visit in the past year, having at least one preventive dental visit in the past year, and visiting the dentist at least once a year for persons with IDD with gross monthly household incomes of above SGD$4000 were 1.28 (95% CI 1.08-1.52), 1.48 (95% CI 1.14-1.92) and 1.36 (95% CI 1.09-1.70), respectively. Among those who were eligible for CHAS Blue subsidies (247 participants), 160 (62.0%) took up the CHAS Blue scheme and 96 (35.4%) visited the dentist at least yearly. There was no statistically significant difference in the utilization of dental services among individuals enrolled in the CHAS Blue subsidy scheme among those eligible for CHAS Blue subsidies. CONCLUSION: Higher household income was associated with a higher prevalence of dental visits in the past year, preventive dental visits in the past year, and at least yearly dental visits. CHAS Blue subsidies alone had limited impact on dental utilization among persons with IDD who were eligible for subsidies.

Development of a dental diet-tracking mobile app for improved caries-related dietary behaviours: Key features and pilot evaluation of quality.

Objective: Diet significantly contributes to dental decay (caries) yet monitoring and modifying patients' diets is a challenge for many dental practitioners. While many oral health and diet-tracking mHealth apps are available, few focus on the dietary risk factors for caries. This study aims to present the development and key features of a dental-specific mobile app for diet monitoring and dietary behaviour change to prevent caries, and pilot data from initial user evaluation. Methods: A mobile app incorporating a novel photo recognition algorithm and a localised database of 208,718 images for food item identification was developed. The design and development process were iterative and incorporated several behaviour change techniques commonly used in mHealth. Pilot evaluation of app quality was assessed using the end-user version of the Mobile Application Rating Scale (uMARS). Results: User feedback from the beta-testing of the prototype app spurred the improvement of the photo recognition algorithm and addition of more user-centric features. Other key features of the final app include real-time prompts to drive actionable behaviour change, goal setting, comprehensive oral health education modules, and visual metrics for caries-related dietary factors (sugar intake, meal frequency, etc.). The final app scored an overall mean (standard deviation) of 3.6 (0.5) out of 5 on the uMARS scale. Conclusion: We developed a novel diet-tracking mobile app tailored for oral health, addressing a gap in the mHealth landscape. Pilot user evaluations indicated good app quality, suggesting its potential as a useful clinical tool for dentists and empowering patients for self-monitoring and behavioural management.

Universalidad de los servicios de salud en México / Universal Coverage of Health Services in Mexico

Las reformas llevadas a cabo en años recientes al sistema de salud en México han reducido las inequidades en la atención a la salud de la población, pero han sido insuficientes para resolver todos los problemas del Sistema Nacional de Salud (SNS). Para que el derecho a la protección de la salud consagrado en la Constitución sea una realidad para todos los ciudadanos, México se encuentra ante la necesidad de garantizar el acceso universal y efectivo a los servicios de salud. En este trabajo se delinea una reforma de largo alcance para la consolidación de un sistema de salud, afín con estándares internacionales, que establezca las condiciones estructurales para reducir las desigualdades en cobertura. Esta reforma se plantea a partir de un "pluralismo estructurado" para evitar tanto el monopolio ejercido desde el sector público como la atomización en el sector privado, y no caer en los extremos de procedimientos autoritarios o ausencia de regulación. Esto implica sustituir la actual integración vertical con segregación de grupos sociales, por una organización horizontal con separación de funciones. Implica, asimismo, reformas de tipo jurídico y fiscal, fortalecimiento del SNS, reorganización de las instituciones de salud y formulación de los instrumentos normativos, técnicos y financieros que hagan operativo el esquema propuesto para hacer plenamente efectivo el derecho humano a la salud de los mexicanos.

The reforms made in recent years to the Mexican Health System have reduced inequities in the health care of the population, but have been insufficient to solve all the problems of the MHS. In order to make the right to health protection established in the Constitution a reality for every citizen, Mexico must warrant effective universal access to health services. This paper outlines a long-term reform for the consolidation of a health system that is akin to international standards and which may establish the structural conditions to reduce coverage inequity. This reform is based on a "structured pluralism" intended to avoid both a monopoly exercised within the public sector and fragmentation in the private sector, and to prevent falling into the extremes of authoritarian procedures or an absence of regulation. This involves the replacement of the present vertical integration and segregation of social groups by a horizontal organization with separation of duties. This also entails legal and fiscal reforms, the reinforcement of the MHS, the reorganization of health institutions, and the formulation of regulatory, technical and financial instruments to operationalize the proposed scheme with the objective of rendering the human right to health fully effective for the Mexican people.

Factores pronósticos de supervivencia en pacientes pediátricos con leucemia linfoblástica aguda afiliados al Seguro Popular / Prognostic factors for survival in pediatric patients with acute lymphoblastic leukemia affiliated with the Seguro Popular insurance program

Introducción. La leucemia linfoblástica aguda es la neoplasia más común en menores de 15 años. Se han identificado factores pronósticos como la edad al diagnóstico, el sexo, la traslocación de genes y el estado nutricional, entre otros. El objetivo de este trabajo fue evaluar algunos de estos factores en pacientes pediátricos con leucemia linfoblástica aguda afiliados al Seguro Popular, destacando los factores socioeconómicos. Métodos. Se trata de un estudio retrospectivo basado en la revisión de 391 expedientes clínicos de nueve hospitales con diferentes tasas de supervivencia, acreditados por el Seguro Popular. Se realizaron análisis descriptivos de variables y de supervivencia por el método Kaplan-Meier, utilizando el programa SPSS v 18.0. Resultados. Menos de la mitad de los pacientes (41.7%) fueron atendidos en hospitales de tercer nivel. Estos presentaron una tasa de supervivencia de 82% a cuatro años de seguimiento. Para los pacientes atendidos en hospitales de segundo nivel, la tasa de supervivencia fue de 55%. Los resultados mostraron que las características del hogar y familiares fueron factores pronósticos de supervivencia. Destacaron el mayor grado de educación, las redes sociales de apoyo y el número de proveedores económicos de la familia. Conclusiones. Los factores que intervienen en el pronóstico del paciente con leucemia linfoblástica aguda son diversos. Se mostró que los factores relacionados con la madre mejoran la supervivencia, aunque se requiere profundizar en este tema.

Introduction. Acute lymphoblastic leukemia (ALL) is the most common malignancy in children <15 years of age. Prognostic factors for survival have been identified such as age at diagnosis, sex, translocation of genes and nutritional status, among others. The aim of this study was to evaluate some of these factors in pediatric patients with ALL affiliated with the Seguro Popular insurance program with an emphasis on socioeconomic factors. Methods. This is a retrospective study based on the review of 391 clinical charts from nine hospitals accredited by the Seguro Popular insurance program with different survival rates. Descriptive and survival Kaplan-Meier analyses were performed with the statistical program SPSS v.18.0. Results. Less than half (41.7%) of the patients were treated at tertiary-care level hospitals with a 4-year survival rate at follow-up of 82%, whereas for secondary-care level hospitals the survival rate was 55%. Results show that household and parental characteristics were predictive of survival, in particular those with higher educational level, support networks and the number of family providers. Conclusions. Several factors are involved in the prognosis of ALL patients. Maternal factors improve survival, but these need to be thoroughly examined.

Estructura hospitalaria y su relación con la sobrevida de pacientes pediátricos con leucemia linfoblástica aguda / Hospital structure and its relation to survival in pediatric patients with acute lymphoblastic leukemia

Introducción. Se han identificado características de las unidades médicas que pueden considerarse como estándares ideales para la atención de pacientes pediátricos con cáncer. La implementación de estos estándares ha mejorado la sobrevida de los pacientes. Como parte de la evaluación de la calidad de la atención que reciben los niños con leucemia linfoblástica aguda afiliados al Seguro Popular, se analizó la relación entre la estructura de las unidades médicas y la mortalidad hospitalaria. Métodos. Se realizó un estudio transversal analítico en nueve hospitales con distintas tasas de supervivencia. Se evaluó la estructura de estos hospitales, considerando los estándares nacionales (cédula de acreditación para la atención de niños con cáncer de la Dirección General de Calidad y Educación en Salud, DGCES) e internacionales. Resultados. Se observó una correlación positiva entre el puntaje de la cédula de acreditación de la DGCES y la supervivencia hospitalaria (r = 0.811, p = 0.001). Al considerar los estándares de referencia internacional, se detectaron deficiencias en la disponibilidad de recursos materiales y humanos. Los factores relacionados con la supervivencia fueron la presencia de residentes de oncología/hematología pediátrica (r = 0.543, p = 0.001), contar con cuartos aislados (r = 0.455, p = 0.008) y tomógrafo (r = 0.454, p = 0.008), el número de pacientes que atienden los médicos o enfermeras por jornada laboral (r = 0.443, p = 0.021), los médicos adscritos a oncología/hematología (r = 0.399, p = 0.021), infectólogo pediatra (r = 0.385, p = 0.027) y cirujano pediatra (r = 0.378, p = 0.030). Conclusiones. La estructura de las unidades médicas se relaciona con la supervivencia de los pacientes pediátricos con leucemia linfoblástica aguda. Se requiere garantizar que los hospitales cuenten con los recursos materiales y humanos necesarios para asegurar una adecuada calidad de la atención a estos pacientes.

Background. Characteristics of medical units that can be considered as ideal standards for pediatric cancer patients have been identified. Implementation of these standards has resulted in improved survival of these patients. As part of the evaluation of the quality of care of pediatric patients with acute lymphoblastic leukemia (ALL) affiliated with the Seguro Popular insurance program, we examined the relationship between hospital structure and patient survival. Methods. A cross-sectional study was carried out in nine hospitals with different survival rates. We evaluated the structure of the hospitals considering national (accreditation program of the General Administration of Quality and Health Education-DGCES) and international standards. Results. There was a positive correlation between the score obtained from the accreditation program and hospital survival (r = 0.811, p = 0.001). When considering international reference standards, deficiencies in material and human resources were identified. Factors related to survival were pediatric oncology/hematology fellowship (r = 0.543, p = 0,001), isolation rooms (r = 0.455, p = 0.008), tomography (r = 0.454, p = 0.008), number of patients per physicians and nurses per shift (r = 0.443, p = 0.021), oncology/hematology physicians (r = 0.399, p = 0.021), pediatric infectious disease specialist (r = 0.385, p = 0.027) and pediatric surgeon (r = 0.378, p = 0.030). Conclusions. The structure of medical units is related to survival of pediatric patients with ALL. It is required that hospitals have human and material resources necessary for the optimal care of these patients.

Calidad de vida de niños mexicanos con leucemia linfoblástica aguda atendidos por el Seguro Popular / Quality of life in Mexican children with acute lymphoblastic leukemia affiliated with the Seguro Popular insurance program

Introducción. La calidad de vida relacionada a la salud es un constructo multidimensional que integra la percepción ante la enfermedad, el tratamiento y el funcionamiento en las áreas física, psicológica y de salud social de cada individuo. El objetivo de este estudio fue disponer de un instrumento confiable que evaluara la calidad de vida relacionada a la salud en niños mexicanos con leucemia linfoblástica aguda. Métodos. Primero, se realizó una revisión sistemática de la literatura hasta el año 2011 y se seleccionaron algunos estudios a partir de Medline. Se identificó que el instrumento Pediatric Cancer Quality of Life Inventory (PCQL-3) es uno de los que más se ha utilizado para evaluar la calidad de vida relacionada a la salud en niños con leucemia linfoblástica aguda. Después, este instrumento se aplicó a 123 pacientes atendidos en el Hospital Infantil de México Federico Gómez, así como a sus padres. Resultados. De la revisión sistemática, se seleccionaron 17 estudios acerca del desarrollo de instrumentos para medir la calidad de vida relacionada a la salud en niños con leucemia linfoblástica aguda, y 15 que describen la calidad de vida. En los 123 pacientes evaluados, se determinó que la calidad de vida relacionada a la salud fue menor en los niños con leucemia linfoblástica aguda de alto riesgo y en las etapas iniciales del tratamiento. También se pudo comprobar que las náuseas y la ansiedad ante los procedimientos son las áreas con mayor afección. Al analizar los resultados de la calidad de vida relacionada a la salud entre los pacientes y los padres, se determinó que existe una buena concordancia (α Cronbach = 0.834). Conclusiones. La medición de la calidad de vida relacionada a la salud en niños con leucemia linfoblástica aguda es parte fundamental para la evaluación integral de su tratamiento y pronóstico. La escala PCQL-3 fue apropiada para la población de niños mexicanos con leucemia linfoblástica aguda.

Background. Health related quality of life (HRQoL) is a multidimensional construct that integrates the individual perception to the disease, treatment, and performance in physical, psychological and social health areas. The aim of this study was to provide a reliable instrument to measure HRQoL in Mexican children with acute lymphoblastic leukemia (ALL). Methods. The study was conducted in two phases. In the first phase we conducted a systematic review of the literature until 2011. Studies were selected from Medline. It was found that Pediatric Cancer Quality of Life Inventory (PCQL-3) is one of the most widely used instruments to assess HRQoL in children with ALL; therefore, it was applied to 123 patients treated at the Hospital Infantil de Mexico Federico Gomez and to their parents in the second phase of the study. Results. From the systematic review, we selected 17 studies of the development of instruments to measure HRQoL in children with ALL, and 15 which described their quality of life. In the 123 patients evaluated, we found that HRQoL was lower among children with high-risk ALL and in those children during the early stages of treatment. It was also found that the most common conditions are nausea and anxiety related to medical procedures. Good agreement (Cronbach α = 0.834) was found in the scores of HRQoL between patients and parents. Conclusions. HRQoL measurement in children with ALL is a central part of the comprehensive assessment of their treatment and prognosis. The PCQL-3 scale is appropriate for its use in Mexican children.

Perfil epidemiológico de la mortalidad por influenza humana A (H1N1) en México / Epidemiological profile of mortality due to human influenza A (H1N1) in Mexico

OBJETIVO: Efectuar el análisis epidemiológico de 122 defunciones por influenza A (H1N1) confirmadas por laboratorio y contribuir a mejorar el diagnóstico y atención oportuna de casos. MATERIAL Y MÉTODOS: Se Analizaron 122 expedientes de pacientes fallecidos por influenza A (H1N1). RESULTADOS: Una proporción de 51 por ciento correspondió a mujeres y 49 por ciento a varones. Hasta 45.1 por ciento ocurrió entre los 20 y 39 años. La letalidad general fue de 2.2 por ciento y varió entre 0.3 por ciento en el grupo de 10 a 19 años y 6.3 por ciento en el de 50 a 59. Una cifra de 43 por ciento de las defunciones se concentró en dos de las 32 entidades federativas y 5l por ciento se atendió en instituciones de seguridad social. Sólo 17 por ciento recibió atención hospitalaria en las primeras 72 horas y 42 por ciento falleció en las primeras 72 horas de hospitalización. En 58.2 por ciento de los fallecidos había algún padecimiento asociado. DISCUSIÓN: El Nuevo virus A (H1N1) produce mayor mortalidad en personas jóvenes, al contrario de lo que sucede con la influenza estacional que muestra un mayor impacto en niños pequeños y personas de edad avanzada. El retraso de la atención médica y la morbilidad asociada fueron factores relevantes del fallecimiento.

OBJECTIVE: To carry out the epidemiological analysis of 122 influenza A (H1N1) deaths confirmed by laboratory and help to improve the diagnosis and timely managing of cases. MATERIAL AND METHODS: A total of 122 clinical records were analyzed of patients with confirmed influenza A (H1N1) virus infection who died. RESULTS: Fifty-one percent of patients were female and 49 percent were male. A total of 45.l percent who died were between 20 and 39 years old. Overall fatality was 2.2 percent and ranged between 0.3 percent for the l0 to l9 year-old group to 6.3 percent for the 50 to 59 year-old group. Forty-three percent of deaths were concentrated in only two of the thirty-two states and 5l percent received medical attention in social security institutions. Only l7 percent received hospital attention within 72 hours and 42 percent died within 72 hours of hospital attention. DISCUSSION: Novel Influenza A (H1N1) virus produces higher mortality in young people whereas seasonal influenza has a greater impact on young children and older people. Delay in medical care and the associated morbidity were relevant factors for death.

Recomendaciones para mejorar la práctica odontológica / Recommendations to improve dental practice

Introducción: las alteraciones estomatológicas tienen una alta incidencia de acuerdo con la Organización Mundial de la Salud, en México se estima que el 90 por ciento de la población padece caries. Objetivo: identificar los principales conflictos por atención odontológica, manifestados en las quejas recibidas en la CONAMED, identificar sus principales características y emitir recomendaciones dirigidas a mejorar la calidad de la práctica odontológica. Metodología: se obtuvo información sobre las quejas recibidas en la CONAMED del área de odontología (enero de 2001 a octubre de 2002); una vez elaboradas las recomendaciones fueron sometidas a un grupo de validación externa integrado por expertos en le área. Resultados: se analizaron 177 quejas; 63,3 por ciento correspondientes a mujeres y 36,7 por ciento a hombres. El grupo de edad más afectado fue el de 25-44 años con 35 por ciento; 91 por ciento de quejas fueron de servicios privados. Los motivos de queja más frecuentes estaban relacionados con el tratamiento en 75.7 por ciento de los casos. Los principales procedimientos realizados fueron: 25.6 por ciento de ortodoncia, 24,4 por ciento prótesis y 13,3 por ciento endodoncia; el resto sin datos significativos. La principal modalidad de conclusión de las quejas fue la conciliación (53.1 por ciento). En un subanálisis de (n=100) se idenetificó mala práctica en 43 por ciento de casos. Asimismo, se identificaron problemas cuyo origen se encuentra en la falta de comunicación o problemas de comunicación en la relación del profesional de la salud bucal-paciente. Conclusiones: los factores identificados en las quejas, tales como la falta de comunicación ante el profesional y el paciente, falsas expectativas de los pacientes y el incumplimiento de las recomendaciones elaboradas