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1.
Genet Med ; 23(4): 758-766, 2021 04.
Artículo en Inglés | MEDLINE | ID: mdl-33281187

RESUMEN

PURPOSE: To estimate health and economic outcomes associated with newborn screening (NBS) for infantile-onset Pompe disease in the United States. METHODS: A decision analytic microsimulation model simulated health and economic outcomes of a birth cohort of 4 million children in the United States. Universal NBS and treatment was compared with clinical identification and treatment of infantile-onset Pompe disease. Main outcomes were projected cases identified, costs, quality-adjusted life-years (QALYs), and incremental cost-effectiveness ratios (ICERs) over the life course. RESULTS: Universal NBS for Pompe disease and confirmatory testing was estimated to cost an additional $26 million annually. Additional medication costs associated with earlier treatment initiation were $181 million; however, $8 million in medical care costs for other services were averted due to delayed disease progression. Infants with screened and treated infantile-onset Pompe disease experienced an average lifetime increase of 11.66 QALYs compared with clinical detection. The ICER was $379,000/QALY from a societal perspective and $408,000/QALY from the health-care perspective. Results were sensitive to the cost of enzyme replacement therapy. CONCLUSION: Newborn screening for Pompe disease results in substantial health gains for individuals with infantile-onset Pompe disease, but with additional costs.


Asunto(s)
Enfermedad del Almacenamiento de Glucógeno Tipo II , Niño , Análisis Costo-Beneficio , Terapia de Reemplazo Enzimático , Enfermedad del Almacenamiento de Glucógeno Tipo II/diagnóstico , Enfermedad del Almacenamiento de Glucógeno Tipo II/epidemiología , Enfermedad del Almacenamiento de Glucógeno Tipo II/genética , Humanos , Lactante , Recién Nacido , Tamizaje Neonatal , Años de Vida Ajustados por Calidad de Vida , Estados Unidos/epidemiología
2.
Ecol Appl ; 28(1): 162-176, 2018 01.
Artículo en Inglés | MEDLINE | ID: mdl-29024139

RESUMEN

Chlorpyrifos is one of the most widely used agricultural insecticides in the world, but to date there is limited empirical information about its potential to interact with other common agricultural stressors. We conducted a 15-d, community-level, microcosm experiment evaluating individual and combined effects of chlorpyrifos, nutrient enrichment, and sedimentation on stream invertebrate communities (abundance, biomass, richness, size structure, composition) and ecosystem processes (primary productivity and leaf decomposition). We found that sedimentation was the most detrimental stressor, with significant negative impacts on most invertebrate community and ecosystem function variables. Even though chlorpyrifos did not cause significant invertebrate mortality in the microcosms, it still altered ecosystem function by lowering leaf decomposition rates, probably through sublethal inhibition of invertebrate shredders. Furthermore, we observed a significant reversal interaction between chlorpyrifos and sediment for small-sized invertebrates collected in gravel (abundance in sediment × insecticide microcosms was 2.4 times lower than predicted by additivity), as well as an antagonistic interaction with nutrients on invertebrate richness in the same microhabitat (richness in nutrient × insecticide microcosms was 1.6 times higher than predicted by additivity). Our results suggest that chlorpyrifos has the potential to alter freshwater ecosystem function and interact non-additively with other common agricultural stressors. These findings are in keeping with a growing body of research highlighting that multiple stressor interactions and ecosystem processes should be considered when evaluating the impacts of organic toxicants on freshwater ecosystems.


Asunto(s)
Cloropirifos/toxicidad , Ecosistema , Invertebrados , Ríos , Contaminantes Químicos del Agua/toxicidad , Animales , Colombia Británica , Calidad del Agua
3.
J Anim Ecol ; 87(5): 1383-1394, 2018 09.
Artículo en Inglés | MEDLINE | ID: mdl-29737519

RESUMEN

Increasing habitat availability (i.e. habitat suitable for occupancy) is often assumed to elevate the abundance or production of mobile consumers; however, this relationship is often nonlinear (threshold or unimodal). Identifying the mechanisms underlying these nonlinearities is essential for predicting the ecological impacts of habitat change, yet the functional forms and ultimate causation of consumer-habitat relationships are often poorly understood. Nonlinear effects of habitat on animal abundance may manifest through physical constraints on foraging that restrict consumers from accessing their resources. Subsequent spatial incongruence between consumers and resources should lead to unimodal or saturating effects of habitat availability on consumer production if increasing the area of habitat suitable for consumer occupancy comes at the expense of habitats that generate resources. However, the shape of this relationship could be sensitive to cross-ecosystem prey subsidies, which may be unrelated to recipient habitat structure and result in more linear habitat effects on consumer production. We investigated habitat-production relationships for juveniles of stream-rearing Pacific salmon and trout (Oncorhynchus spp.), which typically forage in low-velocity pool habitats, while their prey (drifting benthic invertebrates) are produced upstream in high-velocity riffles. However, juvenile salmonids also consume subsidies of terrestrial invertebrates that may be independent of pool-riffle structure. We measured salmonid biomass production in 13 experimental enclosures each containing a downstream pool and upstream riffle, spanning a gradient of relative pool area (14%-80% pool). Increasing pool relative to riffle habitat area decreased prey abundance, leading to a nonlinear saturating effect on fish production. We then used bioenergetics model simulations to examine how the relationship between pool area and salmonid biomass is affected by varying levels of terrestrial subsidy. Simulations indicated that increasing terrestrial prey inputs linearized the effect of habitat availability on salmonid biomass, while decreasing terrestrial inputs exaggerated a "hump-shaped" effect. Our results imply that nonlinear effects of habitat availability on consumer production can arise from trade-offs between habitat suitable for consumer occupancy and habitat that generates prey. However, cross-ecosystem prey subsidies can effectively decouple this trade-off and modify consumer-habitat relationships in recipient systems.


Asunto(s)
Ecosistema , Salmonidae , Animales , Bosques , Invertebrados , Trucha
4.
J Head Trauma Rehabil ; 33(2): E1-E6, 2018.
Artículo en Inglés | MEDLINE | ID: mdl-28422894

RESUMEN

OBJECTIVE: To explore the impact of problem-solving treatment (PST) for mild traumatic brain injury in active duty service members on the use of medical and psychological services. PARTICIPANTS: Service members who had a mild traumatic brain injury during their last deployment and enrolled in the CONcussion Treatment After Combat Trauma (CONTACT) study. DESIGN: Secondary analysis of a randomized clinical trial. Participants were assigned to telephone-based PST, or e-mailed or mailed education only over the course of 6 months. MAIN MEASURE: Self-reported health service utilization from months 4 through 6 and 10 through 12 after initiation of treatment, using the Cornell Service Index. RESULTS: In months 4 to 6, participants receiving PST had 6.17 times the odds of an emergency department visit or hospitalization than those receiving education only (95% confidence interval = 1.92-19.8; P value = .0023). These estimates, however, were not significant using a conservative Bonferroni correction (P value threshold < .0014). There were no other significant differences for other medical or psychological services received in months 4 to 6 or 10 to 12. CONCLUSION: Telephone-based PST was designed to complement clinical care, and this study showed that it may increase emergency department utilization. Future evaluations of PST with more accurate and complete measures of health service utilization are needed.


Asunto(s)
Conmoción Encefálica/psicología , Conmoción Encefálica/terapia , Servicios de Salud Mental , Personal Militar , Solución de Problemas , Telemedicina , Adulto , Servicio de Urgencia en Hospital , Femenino , Humanos , Masculino , Persona de Mediana Edad , Aceptación de la Atención de Salud , Autocuidado , Teléfono , Adulto Joven
5.
J Anim Ecol ; 85(5): 1136-46, 2016 Sep.
Artículo en Inglés | MEDLINE | ID: mdl-26972564

RESUMEN

Spatial resource subsidies can alter bottom-up and top-down forces of community regulation across ecosystem boundaries. Most subsidies are temporally variable, and recent theory has suggested that consumer-resource dynamics can be stabilized if the peak timing of a subsidy is desynchronized with that of prey productivity in the recipient ecosystem. However, magnitude of consumer responses per se could depend on the subsidy timing, which may be a critical component for community dynamics and ecosystem processes. The aim of this study was to test (i) whether a recipient consumer (cutthroat trout) responds differently to a resource subsidy occurring early in its growing season than to a subsidy occurring late in the season and, if this is the case, (ii) whether the timing-dependent consumer response has cascading effects on communities and ecosystem functions in streams. To test those hypotheses, we conducted a large-scale field experiment, in which we directly manipulated the timing of augmentation of the terrestrial invertebrates that enter stream (i.e. peak timing of June-August vs. August-October), keeping constant the total amounts of the invertebrates entered. We found large increases in the individual growth rate and population biomass of the cutthroat trout, in response to the early resource pulse, but not to the late pulse. This timing-dependent consumer response cascaded down to reduce benthic invertebrates and leaf breakdown rate, and increased water nutrient concentrations. Furthermore, the early resource pulse resulted in higher maturity rate of the cutthroat trout in the following spring, demonstrating the importance of the subsidy timing on long-term community dynamics via the consumer's numerical response. Our results emphasize the need to acknowledge timing-dependent consumer responses in understanding the effects of subsidies on communities and ecosystem processes. Elucidating the mechanisms by which consumers effectively exploit pulsed subsidies is an important avenue to better understand community dynamics in spatially coupled ecosystems.


Asunto(s)
Biomasa , Cadena Alimentaria , Invertebrados/fisiología , Oncorhynchus/crecimiento & desarrollo , Ríos , Animales , Organismos Acuáticos/fisiología , Colombia Británica , Ecosistema , Estaciones del Año
7.
Glob Chang Biol ; 20(11): 3386-96, 2014 Nov.
Artículo en Inglés | MEDLINE | ID: mdl-24753392

RESUMEN

Concern over accelerating rates of species invasions and losses have initiated investigations into how local and global changes to predator abundance mediate trophic cascades that influence CO2 fluxes of aquatic ecosystems. However, to date, no studies have investigated how species additions or losses at other consumer trophic levels influence the CO2 flux of aquatic ecosystems. In this study, we added a large predatory stonefly, detritivorous stonefly, or grazer tadpole to experimental stream food webs and over a 70-day period quantified their effects on community composition, leaf litter decomposition, chlorophyll-a concentrations, and stream CO2 emissions. In general, streams where the large grazer or large detritivore were added showed no change in total invertebrate biomass, leaf litter loss, chlorophyll-a concentrations, or stream CO2 emissions compared with controls; although we did observe a spike in CO2 emissions in the large grazer treatment following a substantial reduction in chlorophyll-a concentrations on day 28. However, the large grazer and large detritivore altered the community composition of streams by reducing the densities of other grazer and detritivore taxa, respectively, compared with controls. Conversely, the addition of the large predator created trophic cascades that reduced total invertebrate biomass and increased primary producer biomass. The cascading effects of the predator additions on the food web ultimately led to decreased CO2 emissions from stream channels by up to 95%. Our results suggest that stream ecosystem processes were more influenced by changes in large predator abundance than large grazer or detritivore abundance, because of a lack of functionally similar large predators. Our study demonstrates that the presence/absence of species with unique functional roles may have consequences for the exchange of CO2 between the ecosystem and the atmosphere.


Asunto(s)
Biodiversidad , Biomasa , Invertebrados/fisiología , Ríos , Animales , Anuros/fisiología , Colombia Británica , Dióxido de Carbono/metabolismo , Clorofila/metabolismo , Clorofila A , Monitoreo del Ambiente , Cadena Alimentaria , Insectos/fisiología
8.
Oecologia ; 175(1): 353-61, 2014 May.
Artículo en Inglés | MEDLINE | ID: mdl-24399484

RESUMEN

Climate change and invasive species have the potential to alter species diversity, creating novel species interactions. Interspecific competition and facilitation between predators may either enhance or dampen trophic cascades, ultimately influencing total predator effects on communities and biogeochemical cycling of ecosystems. However, previous studies have only investigated the effects of a single predator species on CO2 flux of aquatic ecosystems. In this study, we measured and compared the individual and joint effects of predatory damselfly larvae and diving beetles on total prey biomass, leaf litter processing, and dissolved CO2 concentrations of experimental bromeliad ecosystems. Damselfly larvae created strong trophic cascades that reduced CO2 concentrations by ~46% relative to no-predator treatments. Conversely, the effects of diving beetles on prey biomass, leaf litter processing, and dissolved CO2 were not statistically different to no-predator treatments. Relative to multiplicative null models, the presence of damselfly larvae and diving beetles together resulted in antagonistic relations that eliminated trophic cascades and top-down influences on CO2 concentrations. Furthermore, we showed that the antagonistic interactions between predators occurred due to a tactile response that culminated in competitive displacement of damselfly larvae. Our results demonstrate that predator identity and predator-predator interactions can influence CO2 concentrations of an aquatic ecosystem. We suggest that predator effects on CO2 fluxes may depend on the particular predator species removed or added to the ecosystem and their interactions with other predators.


Asunto(s)
Dióxido de Carbono/química , Escarabajos , Ecosistema , Cadena Alimentaria , Odonata , Conducta Predatoria , Animales , Biomasa , Bromeliaceae , Conducta Competitiva , Agua Dulce/química , Larva , Modelos Biológicos
9.
Public Health Rep ; : 333549231222479, 2024 Jan 25.
Artículo en Inglés | MEDLINE | ID: mdl-38268479

RESUMEN

OBJECTIVE: Opioid use disorder (OUD) affects approximately 5.6 million people in the United States annually, yet rates of the use of effective medication for OUD (MOUD) treatment are low. We conducted an observational cohort study from August 2017 through May 2021, the MOUD Study, to better understand treatment engagement and factors that may influence treatment experiences and outcomes. In this article, we describe the study design, data collected, and treatment outcomes. METHODS: We recruited adult patients receiving OUD treatment at US outpatient facilities for the MOUD Study. We collected patient-level data at 5 time points (baseline to 18 months) via self-administered questionnaires and health record data. We collected facility-level data via questionnaires administered to facility directors at 2 time points. Across 16 states, 62 OUD treatment facilities participated, and 1974 patients enrolled in the study. We summarized descriptive data on the characteristics of patients and OUD treatment facilities and selected treatment outcomes. RESULTS: Approximately half of the 62 facilities were private, nonprofit organizations; 62% focused primarily on substance use treatment; and 20% also offered mental health services. Most participants were receiving methadone (61%) or buprenorphine (32%) and were predominately non-Hispanic White (68%), aged 25-44 years (62%), and female (54%). Compared with patient-reported estimates at baseline, 18-month estimates suggested that rates of abstinence increased (55% to 77%), and rates of opioid-related overdoses (7% to 2%), emergency department visits (9% to 4%), and arrests (15% to 7%) decreased. CONCLUSIONS: Our results demonstrated the benefits of treatment retention not only on abstinence from opioid use but also on other quality-of-life metrics, with data collected during an extended period. The MOUD Study produced rich, multilevel data that can lay the foundation for an evidence base to inform OUD treatment and support improvement of care and patient outcomes.

10.
Ecology ; 94(9): 1920-6, 2013 Sep.
Artículo en Inglés | MEDLINE | ID: mdl-24279263

RESUMEN

Evidence varies on how subsidies affect trophic cascades within recipient food webs. This could be due to complex nonlinearities being masked by single-level manipulations (presence/absence) of subsidies in past studies. We predicted that trophic cascade strength would increase nonlinearly across a gradient of subsidies. We set out to reveal these complex, nonlinear relationships through manipulating a quantitative gradient of detrital subsidies to lake benthic food webs along with the presence/absence of trout. Contrary to our prediction, we found that trophic cascades only occurred at low subsidy levels, disappearing as subsidies increased. This threshold in trophic cascade strength may be due to an increase in intermediate predators in the absence of top predators, as well as changes in the proportion of armored vs. un-armored primary consumers. Future studies on the effect of subsidies on trophic cascade strength need to incorporate naturally occurring gradients to reveal the complex direct and indirect interactions within food webs.


Asunto(s)
Cadena Alimentaria , Invertebrados/fisiología , Lagos , Smegmamorpha , Trucha , Animales , Modelos Biológicos , Hojas de la Planta , Dinámica Poblacional , Conducta Predatoria/fisiología
11.
Front Public Health ; 11: 1215925, 2023.
Artículo en Inglés | MEDLINE | ID: mdl-38074746

RESUMEN

Despite the investment of public resources to fight staggering suicide rates among veterans, we know little about how veterans and service members in crisis communicate suicidal ideations, and what interventions they are willing to receive. We aim to identify communication and suicide intervention preferences of veterans and service members in times of crisis. Descriptive statistics were used to explore veterans communication of suicidal ideations. While 89.9% of participants indicated they were willing to speak to someone when having thoughts of suicide, less than 26% of participants indicated they were willing to bring up their thoughts with a crisis line or veterans organization. Rather, they indicate that family members (62.2%) and military friends (51.1%) would be their primary outreach. Logistic regression was used to determine whether or not preferred interventions varied by participant demographic characteristics. While the majority of participants indicated they were willing to allow intervention (88.6%), no one method was accepted by the majority of the population. The most accepted means of communication was to proactively contact a friend or family member about general life struggles (32.6%) or suicide-specific concerns (27.5%). Many participants were open to receiving resources (42.0%), suicide-specific mental health treatment (36.3%), and some sort of lethal means safety intervention (19.1%-26.4%). The age, marital status, and veterans status of participants significantly impacted what interventions they were willing to allow. We discuss the implications of these findings and the need for evidence-based, multimodal interventions in order to assist veterans in need.


Asunto(s)
Personal Militar , Suicidio , Veteranos , Humanos , Veteranos/psicología , Suicidio/psicología , Ideación Suicida , Violencia
12.
Sci Total Environ ; 828: 154425, 2022 Jul 01.
Artículo en Inglés | MEDLINE | ID: mdl-35276136

RESUMEN

Forest regeneration has increased in many tropical abandoned lands and current restoration commitments in this region aim to restore over 1,400,000 km2 of degraded land by 2030. Although regenerating forests recover biomass, biodiversity, and processes with time, the recovery trajectories may be uncertain due to past disturbances. Currently, there is a lack of knowledge to sustain the effectiveness of passive regeneration for the recovery of riparian forests and the adjacent waterbodies in the tropics, which may compromise the outcomes of ongoing and future tropical riparian restoration programs. We evaluated the drivers of riparian forest structural recovery and how this relates to stream conditions in 12 abandoned pasturelands in eastern Brazilian Amazonia. These pasturelands range across regeneration age (pasture (PA) - 0 to 4 years; young regeneration (YR) - 8 to 12 years; old regeneration (OR) - 18 to 22 years) and years of past land-use (PA - 23.25 average years of past land-use, YR - 18.25, OR - 7). We compared the conditions of these sites to 4 reference sites with conserved forests (REF, >100 years), where there was no recorded pasture use in the past. Short-term responses of forests and streams to passive regeneration indicated high ecosystem resilience after low to intermediate past land-use intensity, reflected in the improvement of stream ecosystems. Such high resilience is possibly attributable to low- to intermediate-intensity pasture-related disturbances, remaining forest matrix, and residual structures (e.g. roots, sprouts, and in-stream wood) observed in the area. Our results suggest a recovery by 12 to 20 years for riparian forests of this region. However, areas degraded by intensive land-use apparently showed delayed recovery. We conclude that seizing resilience windows (defined here as the period when ecosystems retain high potential resilience) is essential to foster passive recovery of riparian forests and streams more cost-effectively in the tropics.


Asunto(s)
Ecosistema , Agua , Biodiversidad , Bosques , Ríos , Árboles
13.
Ecology ; 92(1): 151-9, 2011 Jan.
Artículo en Inglés | MEDLINE | ID: mdl-21560685

RESUMEN

Cross-boundary flows of energy and nutrients link biodiversity and functioning in adjacent ecosystems. The composition of forest tree species can affect the structure and functioning of stream ecosystems due to physical and chemical attributes, as well as changes in terrestrial resource subsidies. We examined how variation in riparian canopy composition (coniferous, deciduous, mixed) affects adjacent trophic levels (invertebrate and microbial consumers) and decomposition of organic matter in small, coastal rainforest streams in southwestern British Columbia. Breakdown rates of higher-quality red alder (Alnus rubra) litter were faster in streams with a greater percentage of deciduous than coniferous riparian canopy, whereas breakdown rates of lower-quality western hemlock (Tsuga heterophylla) litter were independent of riparian forest composition. When invertebrates were excluded using fine mesh, breakdown rates of both litter species were an order of magnitude less and were not significantly affected by riparian forest composition. Stream invertebrate and microbial communities were similar among riparian forest composition, with most variation attributed to leaf litter species. Invertebrate taxa richness and shredder biomass were higher in A. rubra litter; however, taxa evenness was greatest for T. heterophylla litter and both litter species in coniferous streams. Microbial community diversity (determined from terminal restriction fragment length polymorphisms) was unaffected by riparian forest or litter species. Fungal allele richness was higher than bacterial allele richness, and microbial communities associated with lower-quality T. heterophylla litter had higher diversity (allele uniqueness and richness) than those associated with higher-quality A. rubra litter. Percent variation in breakdown rates was mostly attributed to riparian forest composition in the presence of invertebrates and microbes; however, stream consumer biodiversity at adjacent trophic levels did not explain these patterns. Riparian and stream ecosystems and their biotic communities are linked through exchange and decomposition of detrital resources, and we provide evidence that riparian forest composition affects stream ecosystem catabolism despite similarities in microbial and invertebrate communities.


Asunto(s)
Bacterias/metabolismo , Ecosistema , Invertebrados/fisiología , Ríos , Árboles , Animales , Biodegradación Ambiental
14.
Conserv Biol ; 25(1): 9-20, 2011 Feb.
Artículo en Inglés | MEDLINE | ID: mdl-21091767

RESUMEN

The umbrella-species concept, which suggests that conservation strategies designed for one species may benefit co-occurring species, has been promoted as a framework for conservation planning. Nevertheless, there has been considerable variation in the outcome of empirical tests of this concept that has led researchers to question its value, so we used data from 15 published studies in a meta-analysis to evaluate whether conservation of putative umbrella species also conserves co-occurring species. We tested the effectiveness of putative umbrella species categorized by taxonomic group, taxonomic similarity to co-occurring species, body size, generality of resource use, and trophic level to evaluate criteria proposed to guide the selection of umbrella species. We compared species richness and number of individuals (by species and higher taxonomic group) between sites with and without putative umbrella species to test whether more co-occurring species were present in greater abundances when the area or resource needs of umbrella species were met. Species richness and abundance of co-occurring species were consistently higher in sites where umbrella species were present than where they were not and for conservation schemes with avian than with mammalian umbrella species. There were no differences in species richness or species abundance with resource generalist or specialist umbrella species or based on taxonomic similarity of umbrella and co-occurring species. Taxonomic group abundance was higher in across-taxonomic umbrella species schemes than when umbrella species were of the same taxon as co-occurring species. Co-occurring species had similar, or higher, species richness with small-bodied umbrella species relative to larger-bodied umbrella species. The only significant difference among umbrella species categorized by trophic level was that species richness was higher with omnivorous than it was with carnivorous avian umbrella species. Our results suggest there is merit to the umbrella-species concept for conservation, but they do not support the use of the criteria we used to identify umbrella species.


Asunto(s)
Conservación de los Recursos Naturales/métodos , Política Ambiental , Animales , Biodiversidad , Aves , Mamíferos , Dinámica Poblacional
15.
Ecol Appl ; 20(1): 126-34, 2010 Jan.
Artículo en Inglés | MEDLINE | ID: mdl-20349835

RESUMEN

Historically, forested riparian buffers have been created to provide protection for aquatic organisms and aquatic ecosystem functions. Increasingly, new and existing riparian buffers are being used also to meet terrestrial conservation requirements. To test the effectiveness of riparian buffers for conserving terrestrial fauna, we conducted a meta-analysis using published data from 397 comparisons of species abundance in riparian buffers and unharvested (reference) riparian sites. The response of terrestrial species to riparian buffers was not consistent between taxonomic groups; bird and arthropod abundances were significantly greater in buffers relative to unharvested areas, whereas amphibian abundance decreased. Edge-preferring species were more abundant in buffer sites than reference sites, whereas species associated with interior habitat were not significantly different in abundance. The degree of buffer effect on animal abundance was unrelated to buffer width; wider buffers did not result in greater similarity between reference and buffer sites. However, responses to buffer treatment were more variable in buffers <50 m wide, a commonly prescribed width in many management plans. Our results indicate that current buffer prescriptions do not maintain most terrestrial organisms in buffer strips at levels comparable to undisturbed sites.


Asunto(s)
Conservación de los Recursos Naturales/métodos , Ríos , Árboles , Movimientos del Agua , Contaminación Química del Agua/prevención & control , Animales
16.
Prev Chronic Dis ; 6(4): A121, 2009 Oct.
Artículo en Inglés | MEDLINE | ID: mdl-19754997

RESUMEN

INTRODUCTION: Our study extends previous studies that have evaluated the level of bias in self-reported height and weight and corresponding body mass index (BMI). Results are evaluated by age, sex, income, race/ethnicity, and BMI classifications. METHODS: Analyses are based on the National Health and Nutrition Examination Survey (NHANES) from 2001-2006. The sample was 8,208 men and 8,606 women aged 16 years or older. RESULTS: On average, men overreport their height by 1.22 cm (0.48 in) and their weight by 0.30 kg (0.66 lbs), and women overreport their height by 0.68 cm (0.27 in) and underreport their weight by -1.39 kg (-3.06 lbs). Overreporting of height significantly increases with age after age 50 for men and after age 60 for women. Overreporting of weight in men is significant in the age groups 16 to 49 years and 70 years or older. Women significantly underreport their weight in each age group but more so in the age group 16 to 49 years, followed by 50 to 69 years, and then 70 years or older. Men are more likely than women to think their weight is about right if they are at a normal weight or are overweight or obese, but women are more likely to think their weight is about right if they are underweight. CONCLUSION: Men and women significantly overreport their height, increasingly so at older ages. Men tend to overestimate their weight, but women underreport their weight, more so in younger ages. Corresponding BMI is underestimated, more so for women than for men at each age and increasingly so with older age for both sexes.


Asunto(s)
Estatura , Índice de Masa Corporal , Peso Corporal , Encuestas Nutricionales , Adolescente , Adulto , Factores de Edad , Anciano , Femenino , Humanos , Masculino , Persona de Mediana Edad , Reproducibilidad de los Resultados , Autoimagen , Caracteres Sexuales , Estados Unidos , Adulto Joven
17.
Sci Total Environ ; 692: 1291-1303, 2019 Nov 20.
Artículo en Inglés | MEDLINE | ID: mdl-31539961

RESUMEN

Pesticides are important contributors to the global freshwater biodiversity crisis. Among pesticides, neonicotinoids are the best-selling class of agricultural insecticides and are suspected to represent significant risks to freshwater and terrestrial ecosystems worldwide. Despite growing recognition that neonicotinoid impacts may be modified by the presence of additional stressors, there is limited information about their interactions with other agricultural stressors in freshwater ecosystems. We conducted an outdoor pond-mesocosm experiment to investigate the individual and interactive effects of nutrients, fine sediment, and imidacloprid (a neonicotinoid insecticide) inputs on freshwater community structure (density, diversity, and composition of zooplankton and benthic invertebrates) and ecosystem functioning (ecosystem metabolism, primary production, and organic matter decomposition). We hypothesized antagonistic nutrient-imidacloprid, and synergistic sediment-imidacloprid interactions, affecting aquatic invertebrate communities. The three stressors had significant individual and interactive effects on pond ecosystems. The insecticide neutralized the positive effects of nutrient additions on benthic invertebrate richness and mitigated the negative effects of sediment on zooplankton communities (antagonistic interactions). Moreover, we observed compensatory responses of tolerant benthic invertebrates, which resulted in reversal interactions between sediment and imidacloprid. Furthermore, our observations suggest that imidacloprid has the potential to increase net ecosystem production at environmentally relevant concentrations. Our findings support the hypothesis that the impacts of imidacloprid may be modified by other agricultural stressors. This has important implications on a global scale, given the widespread use of these pesticides in intensive agricultural landscapes and the growing body of literature suggesting that traditional pesticide assessment frameworks, based on laboratory toxicity tests alone, may be insufficient to adequately predict effects to complex freshwater ecosystems.


Asunto(s)
Organismos Acuáticos/fisiología , Ecosistema , Insecticidas/toxicidad , Neonicotinoides/toxicidad , Contaminantes Químicos del Agua/toxicidad , Agricultura , Animales , Biodiversidad , Monitoreo del Ambiente , Agua Dulce , Insecticidas/análisis , Invertebrados/fisiología , Neonicotinoides/análisis , Nitrógeno , Fósforo , Contaminantes Químicos del Agua/análisis , Zooplancton
18.
PLoS One ; 13(9): e0200180, 2018.
Artículo en Inglés | MEDLINE | ID: mdl-30192753

RESUMEN

Allochthonous detritus of terrestrial origin is one of the main energy sources in forested headwater streams, but its poor nutritional quality makes it difficult to use by heterotrophs. It has been suggested that algae growing on this detritus can enhance its nutritional quality and promote decomposition. So far, most evidence of this "priming effect" is derived from laboratory or mesocosm experiments, and its importance under natural conditions is unclear. We measured accrual of algae, phosphorus uptake capacity, and decomposition of poplar leaves in autumn in open- and closed-canopy reaches in 3 forest and 3 agricultural streams. Chlorophyll a abundance did not change significantly with stream type or with canopy cover, although in some agricultural streams it was higher in open than in closed canopy reaches. Canopy cover did not affect either phosphate uptake capacity or microbial decomposition. On the other hand, although there was no effect of canopy cover on invertebrate fragmentation rate, a significant interaction between canopy cover and stream suggests priming occurs at least in some streams. Overall, the results point to a weak or no priming effect of algae on litter decomposition in natural streams during autumn.


Asunto(s)
Rhodophyta , Ríos , Estaciones del Año , Bioensayo
19.
Vaccine ; 36(43): 6416-6423, 2018 10 15.
Artículo en Inglés | MEDLINE | ID: mdl-30236631

RESUMEN

PURPOSE: Measure the preferences of decision makers and researchers associated with the Advisory Committee on Immunization Practices (ACIP) regarding the recommended format for presenting health economics studies to the ACIP. METHODS: We conducted key informant interviews and an online survey of current ACIP work group members, and current and previous ACIP voting members, liaison representatives, and ex-officio members to understand preferences for health economics presentations. These preferences included the presentation of results and sensitivity analyses, the role of health economics studies in decision making, and strategies to improve guidelines for presenting health economics studies. Best-worst scaling was used to measure the relative value of seven attributes of health economics presentations in vaccine decision making. RESULTS: The best-worst scaling survey had a response rate of 51% (n = 93). Results showed that summary results were the most important attribute for decision making (mean importance score: 0.69) and intermediate outcomes and disaggregated results were least important (mean importance score: -0.71). Respondents without previous health economics experience assigned sensitivity analysis lower importance and relationship of the results to other studies higher importance than the experienced group (sensitivity analysis scores: -0.15 vs. 0.15 respectively; relationship of the results: 0.13 vs. -0.12 respectively). Key informant interviews identified areas for improvement to include additional information on the quality of the analysis and increased role for liaisons familiar with health economics. CONCLUSION: Additional specificity in health economics presentations could allow for more effective presentations of evidence for vaccine decision making.


Asunto(s)
Toma de Decisiones , Política de Salud/economía , Inmunización/economía , Investigadores , Comités Consultivos , Política de Salud/legislación & jurisprudencia , Humanos , Inmunización/legislación & jurisprudencia , Inmunización/normas , Programas de Inmunización/economía , Programas de Inmunización/legislación & jurisprudencia , Programas de Inmunización/normas , Encuestas y Cuestionarios , Vacunas/economía , Vacunas/normas
20.
Psychiatr Serv ; 69(9): 1032-1035, 2018 09 01.
Artículo en Inglés | MEDLINE | ID: mdl-29852826

RESUMEN

OBJECTIVE: Single-site studies indicate irregular hospital discharges are associated with elevated suicide risk. As part of ongoing analytics in the Veterans Affairs (VA) health system, the authors evaluated associations between irregular discharge and suicide over a 15-year period. METHODS: All inpatient discharges and discharge types from 2001 through 2014 were identified using VA administrative data. Mortality and cause-of-death data were drawn from comprehensive VA searches of the Centers for Disease Control and Prevention National Death Index. Suicide risk following regular versus irregular discharge was compared by using survival analysis and adjusting for age, gender, and VA facility. RESULTS: Among 5,051,051 discharges, 2.1% (103,995) were irregular. Adjusted suicide risk was higher following irregular discharge compared with regular discharge (hazard ratio [HR]=2.02, 95% confidence interval [CI]=1.78-2.29). Stratified analyses by unit type showed that the association was nonsignificant for psychiatric discharges but significant for general medical discharges (HR=3.01, CI=2.54-3.57). CONCLUSIONS: Patients were at increased suicide risk after irregular hospital discharges.


Asunto(s)
Hospitales de Veteranos/estadística & datos numéricos , Alta del Paciente/estadística & datos numéricos , Suicidio/estadística & datos numéricos , Causas de Muerte , Humanos , Factores de Riesgo , Análisis de Supervivencia , Estados Unidos , Veteranos/psicología
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