RESUMEN

Determining biomarkers and better characterizing the biochemical progression of nonalcoholic fatty liver disease (NAFLD) remains a clinical challenge. A targeted 1H-NMR study of serum, combined with clinical variables, detected and localized biomarkers to stages of NAFLD in morbidly obese females. Pre-surgery serum samples from 100 middle-aged, morbidly obese female subjects, grouped on gold-standard liver wedge biopsies (non-NAFLD; steatosis; and fibrosis) were collected, extracted, and analyzed in aqueous (D2O) buffer (1H, 600 MHz). Profiled concentrations were subjected to exploratory statistical analysis. Metabolites varying significantly between the non-NAFLD and steatosis groups included the ketone bodies 3-hydroxybutyrate (↓; p = 0.035) and acetone (↓; p = 0.012), and also alanine (↑; p = 0.004) and a putative pyruvate signal (↑; p = 0.003). In contrast, the steatosis and fibrosis groups were characterized by 2-hydroxyisovalerate (↑; p = 0.023), betaine (↓; p = 0.008), hypoxanthine (↓; p = 0.003), taurine (↓; p = 0.001), 2-hydroxybutyrate (↑; p = 0.045), 3-hydroxyisobutyrate (↑; p = 0.046), and increasing medium chain fatty acids. Exploratory classification models with and without clinical variables exhibited overall success rates ca. 75-85%. In the study conditions, inhibition of fatty acid oxidation and disruption of the hepatic urea cycle are supported as early features of NAFLD that continue in fibrosis. In fibrosis, markers support inflammation, hepatocyte damage, and decreased liver function. Complementarity of NMR concentrations and clinical information in classification models is shown. A broader hypothesis that standard-of-care sera can yield metabolomic information is supported.

RESUMEN

African Americans are perceived to be least likely of all racial and ethnic groups to prepare for the end of life. However, verbal plans for the end of life are of particular importance to this population and may help understand why they are less likely to possess a formal end-of-life care planning document. The purpose of this study was to determine the number of formal and/or informal end-of-life care plans that existed among a convenience sample of African American older adults with dementia. For this descriptive study, data were collected from African American family caregivers (N = 65) of older adults with dementia. Descriptive statistics were conducted. Caregivers in this sample reported high rates of formal and/or informal end-of-life plans for their care recipients. Agency forms (power of attorney, health-care surrogate, or guardianship forms) had been obtained by 74% of the care recipients, while 63% of them possessed a formal end-of-life care planning document. All combined, 88% of the caregivers possessed at least 1 document or verbal information concerning end-of-life care for their care recipient or at least there was an assigned surrogate. Although limited, these findings reflect more end-of-life planning in this population than previous studies reported and could improve the quality of end-of-life outcomes in this population by giving health-care providers increased understanding of African American end-of-life planning preferences. This may, in turn, help the providers to inform and educate these care recipients and their family caregivers.

Asunto(s)

RESUMEN

A flexible strategy for choosing samples nonuniformly from a Nyquist grid using the concept of statistical quantiles is presented for broad classes of NMR experimentation. Quantile-directed scheduling is intuitive and flexible for any weighting function, promotes reproducibility and seed independence, and is generalizable to multiple dimensions. In brief, weighting functions are divided into regions of equal probability, which define the samples to be acquired. Quantile scheduling therefore achieves close adherence to a probability distribution function, thereby minimizing gaps for any given degree of subsampling of the Nyquist grid. A characteristic of quantile scheduling is that one-dimensional, weighted NUS schedules are deterministic, however higher dimensional schedules are similar within a user-specified jittering parameter. To develop unweighted sampling, we investigated the minimum jitter needed to disrupt subharmonic tracts, and show that this criterion can be met in many cases by jittering within 25-50% of the subharmonic gap. For nD-NUS, three supplemental components to choosing samples by quantiles are proposed in this work: (i) forcing the corner samples to ensure sampling to specified maximum values in indirect evolution times, (ii) providing an option to triangular backfill sampling schedules to promote dense/uniform tracts at the beginning of signal evolution periods, and (iii) providing an option to force the edges of nD-NUS schedules to be identical to the 1D quantiles. Quantile-directed scheduling meets the diverse needs of current NUS experimentation, but can also be used for future NUS implementations such as off-grid NUS and more. A computer program implementing these principles (a.k.a. QSched) in 1D- and 2D-NUS is available under the general public license.

RESUMEN

The purpose of the current study was to examine understanding of end-of-life (EOL) decision-making terminology among family caregivers of African American older adults with dementia. This qualitative descriptive study was part of a larger mixed-methods study from which a subset of caregivers (n = 18) completed interviews. Data were analyzed using descriptive statistics and content analyses guided by methods of qualitative analysis. Caregiver interpretation of EOL decision-making terminology varied between associations before and/or after death. EOL decision making was most often a family decision, based on past experiences, and included reliance on resources such as faith or spirituality and health care providers. Patients and families attach meaning to health care terms that should be aligned with health care providers' understanding of those terms. Results provide insight to improve EOL decision making in this population via tailored interventions for patients, families, and health care providers. [Journal of Gerontological Nursing, 44(2), 33-40.].

Asunto(s)

RESUMEN

OBJECTIVE: The purpose of this study was to determine whether implementing a program based on a clinical protocol affects breastfeeding rates within a pediatric primary care setting. Increasing breastfeeding rates is an important public health initiative identified by multiple agencies. METHODS: The Academy of Breastfeeding Medicine (ABM) clinical protocol ("The Breastfeeding-Friendly Physician's Office, Part 1: Optimizing Care for Infants and Children") was used as a template for the provision of breastfeeding services within a pediatric primary care clinic. There were 757 mother-infant pairs included in the study. A retrospective before-and-after study design was used. Data collection points included the hospital stay, the newborn visit, and the 2-, 4-, and 6-month health maintenance visits. The 2 groups were compared to estimate the protocol's effectiveness as a method of increasing breastfeeding rates. RESULTS: The results of this evaluation were positive for exclusive breastfeeding, with group comparisons showing a statistically significant increase in exclusive breastfeeding rates at all 5 time points. CONCLUSIONS: Our diverse patient population within a pediatric practice had increased initiation rates and exclusive breastfeeding rates after implementation of the ABM's breastfeeding-friendly protocol. Families who receive care in a pediatric primary care setting that has implemented the ABM clinical protocol may have increased rates of exclusive breastfeeding.

Asunto(s)

Asunto(s)