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INTRODUCTION: Screening for smoking when people interact with healthcare services and referral of those who smoke to stop smoking services (SSSs) is a key component of efforts to tackle tobacco use. However, little is known about what happens after someone is referred or signposted to SSSs. METHODS: As part of the Cessation of Smoking Trial in the Emergency Department (NCT04854616), those randomised to intervention (n= 505) were referred to local SSSs (along with receiving brief advice and an e-cigarette starter kit) and those randomised to control (n= 502) were given contact details for the same services (signposted). SSS engagement data was collected: 1) directly from participants and 2) from SSS, additional qualitative data came from 33 participant interviews. RESULTS: Engagement with SSSs was very low. 3.2% (n=16) of those in the intervention group and 2.4% (n=12) in the control group reported attending a one-to-one support session. From SSS data, engagement was also low with 8.9% (n=43) of those referred engaging and 3.1% (n=15) going on to quit with SSS support. The majority of the 24 intervention participants interviewed did not recall being contacted by an SSS. CONCLUSION: Referral or signposting to stop smoking services within an Emergency Department based trial resulted in very low levels of engagement. Barriers to engagement identified included participants not being contacted by SSSs and the support offered not meeting their needs. IMPLICATIONS: Referral or signposting of those who smoke to Stop smoking services from the Emergency Department resulted in low rates of engagement in this large multi-centre randomised controlled trial. In order to better support those who smoke it may be more effective for smoking cessation advice to be offered 'in the moment' within clinical settings, and follow-up to be proactively offered rather than relying on people being motivated to contact the services themselves or engaging when contacted.
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It is unclear whether implicit memory (priming) is affected by aging. Some studies have reported no difference between young and older adults, while others have uncovered reliable reductions. An important factor that may explain these discrepancies is the manner of encoding. Processing requirements (perceptual/conceptual) have varied considerably between studies, yet processing abilities are not equally affected by aging. This study examined whether processing during encoding moderates age effects on priming. Young and older participants studied object-word pairs and made natural/manufactured (conceptual) and left/right rotation (perceptual) judgements in relation to the word or object. Objects served as targets on a subsequent continuous identification with recognition task to assess priming and recognition. Priming and recognition were greater in young than older adults for attended items, with a larger effect size in the conceptual than the perceptual condition. Findings suggest that age differences in priming may be a function of processing at encoding.
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Envejecimiento , Reconocimiento en Psicología , Humanos , AncianoRESUMEN
BACKGROUND: A proportion of patients with adrenal insufficiency (AI) require increases in their maintenance glucocorticoids following the Covid-19 vaccine as a result of vaccine-related symptoms or development of incipient or frank adrenal crisis. In a large cohort of AI patients, we aim to characterise symptoms, changes in glucocorticoid dosage, occurrence of adrenal crises and whether there are differences between the mRNA and adenovirus vector vaccines. PATIENTS AND METHODS: Patients with AI of any aetiology were invited to complete a short, structured questionnaire of their experience of the Covid-19 vaccination. RESULTS: 279 of the 290 patients enrolled to this study fully completed the questionnaires. 176, 100 and 3 received the Astra Zeneca (AZ), Pfizer-BioNTech (PB) and Moderna (MD) as initial vaccine respectively; and for the second vaccine, 170, 99 and 10 received AZ, PB and MD respectively. Moderate to severe symptoms occurred in 44.8 and 39.7% after the first and second vaccines respectively, were of early onset (6.0 h, IQR 2-12 &. 6.0 h, IQR 2-24 h) and short duration (24 h, IQR 12-72 h & 26 h, IQR 12-72 h). 34.4 and 29.7% increased their maintenance glucocorticoid dose. DISCUSSION: The Covid-19 vaccines appear well-tolerated in patients with AI, with similar frequency of symptoms to that reported in the background population. The AZ vaccine leads to slightly greater post-vaccination symptom burden and need to increase glucocorticoid dosage, but this does not translate to greater adverse outcomes.
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Insuficiencia Suprarrenal , COVID-19 , Humanos , Vacunas contra la COVID-19/efectos adversos , Glucocorticoides/uso terapéutico , COVID-19/prevención & control , EsteroidesRESUMEN
BACKGROUND: Supporting people to quit smoking is one of the most powerful interventions to improve health. The Emergency Department (ED) represents a potentially valuable opportunity to deliver a smoking cessation intervention if it is sufficiently resourced. The objective of this trial was to determine whether an opportunistic ED-based smoking cessation intervention can help people to quit smoking. METHODS: In this multicentre, parallel-group, randomised controlled superiority trial conducted between January and August 2022, adults who smoked daily and attended one of six UK EDs were randomised to intervention (brief advice, e-cigarette starter kit and referral to stop smoking services) or control (written information on stop smoking services). The primary outcome was biochemically validated abstinence at 6 months. RESULTS: An intention-to-treat analysis included 972 of 1443 people screened for inclusion (484 in the intervention group, 488 in the control group). Of 975 participants randomised, 3 were subsequently excluded, 17 withdrew and 287 were lost to follow-up. The 6-month biochemically-verified abstinence rate was 7.2% in the intervention group and 4.1% in the control group (relative risk 1.76; 95% CI 1.03 to 3.01; p=0.038). Self-reported 7-day abstinence at 6 months was 23.3% in the intervention group and 12.9% in the control group (relative risk 1.80; 95% CI 1.36 to 2.38; p<0.001). No serious adverse events related to taking part in the trial were reported. CONCLUSIONS: An opportunistic smoking cessation intervention comprising brief advice, an e-cigarette starter kit and referral to stop smoking services is effective for sustained smoking abstinence with few reported adverse events. TRIAL REGISTRATION NUMBER: NCT04854616.
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INTRODUCTION: E-Cigarette voucher schemes have been piloted across the UK to support populations to quit smoking. This short report evaluates a scheme that targets vulnerable and disadvantaged smokers who had failed to quit smoking by other means. METHODS: Descriptive summary evaluation of service data on smoking outcomes and qualitative data from selected participants, as "key-informants" (n = 4) and key stakeholders (stop smoking staff, vape shop staff, and general practitioners [GPs]). RESULTS: In total, 668 participants were referred to the scheme, and 340 participants redeemed a voucher. By intention to treat analysis (ITT) 143/668 (21%) were recorded as quit smoking at 4 weeks. At 12 weeks, 7.5% of participants had quit, by ITT. Overall, the pilot project was well received by clients as it offered an affordable route into vaping for smoking cessation. GPs supported the scheme and appreciated being able to offer an alternative to entrenched smokers. CONCLUSIONS: The scheme shows promise in supporting entrenched smokers to quit smoking. The offer of similar voucher schemes across the UK suggests the potential to reduce overall smoking prevalence and associated morbidity and mortality. IMPLICATIONS: Working with GPs in a deprived area, it was possible to set-up a vape shop voucher scheme for smoking cessation. Patients with comorbidities who had tried and failed to quit smoking previously were referred to receive a vape shop voucher to be redeemed for an initial starter kit, alongside support from the stop smoking service. This innovative scheme enabled 42% of entrenched smokers who redeemed a voucher to successfully quit smoking within 4 weeks.
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Sistemas Electrónicos de Liberación de Nicotina , Cese del Hábito de Fumar , Vapeo , Humanos , Proyectos Piloto , Fumar , Reino Unido/epidemiología , Vapeo/epidemiologíaRESUMEN
Recent evidence suggests that temporal expectation is beneficial to memory formation. Rhythmic presentation of stimuli during encoding enhances subsequent recognition and is associated with distinct neural activity compared with when stimuli are presented in an arrhythmic manner. However, no prior study has examined how temporal expectation interacts with another important form of facilitation-spatial attention-to affect memory. This study systematically manipulated temporal expectation and spatial attention during encoding to examine their combined effect on behavioral recognition and associated ERPs. Participants performed eight experimental blocks consisting of an encoding phase and recognition test, with EEG recorded throughout. During encoding, pairs of objects and checkerboards were presented and participants were cued to attend to the left or right stream and detect targets as quickly as possible. In four blocks, stimulus presentation followed a rhythmic (constant, predictable) temporal structure, and in the other four blocks, stimulus onset was arrhythmic (random, unpredictable). An interaction between temporal expectation and spatial attention emerged, with greater recognition in the rhythmic than the arrhythmic condition for spatially attended items. Analysis of memory-specific ERP components uncovered effects of spatial attention. There were late positive component and FN400 old/new effects in the attended condition for both rhythmic and arrhythmic items, whereas in the unattended condition, there was an FN400 old/new effect and no late positive component effect. The study provides new evidence that memory improvement as a function of temporal expectation is dependent upon spatial attention.
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Motivación , Reconocimiento en Psicología , Atención , Señales (Psicología) , Electroencefalografía , Potenciales Evocados , HumanosRESUMEN
Predictive Processing accounts of autism claim that autistic individuals assign higher precision to their prediction errors than non-autistic individuals, that is, autistic individuals update their predictions more readily when faced with unexpected sensory input. Since setting the level of precision is a fundamental part of perception and learning, we propose that such differences should be detectable in various domains at a very early age, before clinical symptoms have fully emerged. We therefore tested 3-year-old younger siblings of autistic children, with a high likelihood of later receiving an autism diagnosis themselves, and low-likelihood children with an older sibling without autism. We used a novel implicit learning paradigm to examine the effect of sensory noise on the predictions participants built. In order to learn a sequence, our participants had to select which visual information to attend to and disregard low-level prediction errors caused by the sensory noise, which the theory claims is more difficult for autistic individuals. Contrary to the proposed higher precision-weighting of prediction errors in autism, the high-likelihood children did not show signs of updating their predictions more readily when we added sensory noise compared to the low-likelihood children, either in their reaction times or in the recurrence and determinism of their response locations. These results raise challenges for Predictive Processing theories of autism, specifically for the notion that prediction errors are inflexibly highly weighted by individuals with autism.
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Trastorno del Espectro Autista , Trastorno Autístico , Niño , Preescolar , Humanos , Aprendizaje , Tiempo de Reacción , HermanosRESUMEN
Children diagnosed with autism spectrum disorder (ASD) often have smaller vocabularies in infancy compared to typically-developing children. To understand whether their smaller vocabularies stem from problems in learning, our study compared a prospective risk sample of 18 elevated risk and 11 lower risk 24-month-olds on current vocabulary size and word learning ability using a paradigm in which parents teach their child words. Results revealed that both groups learned novel words, even though parents indicated that infants at elevated risk of ASD knew fewer words. This suggests that these early compromised vocabularies cannot be solely linked to difficulties in word formations.
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Trastorno del Espectro Autista , Niño , Humanos , Lactante , Desarrollo del Lenguaje , Padres , Estudios Prospectivos , VocabularioRESUMEN
Smart homes are becoming increasingly popular in providing people with the services they desire. Activity recognition is a fundamental task to provide personalised home facilities. Many promising approaches are being used for activity recognition; one of them is data-driven. It has some fascinating features and advantages. However, there are drawbacks such as the lack of ability to providing home automation from the day one due to the limited data available. In this paper, we propose an approach, called READY (useR-guided nEw smart home ADaptation sYstem) for developing a personalised automation system that provides the user with smart home services the moment they move into their new house. The system development process was strongly user-centred, involving users in every step of the system's design. Later, the user-guided transfer learning approach was introduced that uses an old smart home data set to enhance the existing smart home service with user contributions. Finally, the proposed approach and designed system were tested and validated in the smart lab that showed promising results.
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BACKGROUND: The COVID-19 pandemic in England led to major changes in the delivery of support via stop smoking services (SSS) and to the widespread temporary closure of bricks and mortar e-cigarette retailers (vape shops herein). The impact of disruptions across the smoking cessation support landscape has not been fully documented. The purpose of this study was to capture how SSS and vape shops in England were affected and adapted their 'business as usual' during the early months of the COVID-19 pandemic. METHOD: An online cross-sectional survey was conducted between March and July 2020. Surveys were disseminated through online networks, professional forums and contacts. Open-ended qualitative responses were coded using thematic analysis. RESULTS: Responses from 46 SSS and 59 vape shops were included. SSS were able to adapt during this period, e.g. offering a remote service. A high percentage (74.6%) of vape shops had to close and were unable to make changes; 71.2% reported business declining. For both vape shops and SSS qualitative data revealed practical challenges to adapting, but also new pathways to support and co-working. CONCLUSION: The closure of vape shops appears to have most impacted smaller bricks and mortar shops affecting businesses by decline in customers and impacting staff (furlough). For those services that could stay open there may be lessons learned in how to support vulnerable and disadvantaged people who smoke by considering new pathways to support.
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COVID-19 , Comercio/estadística & datos numéricos , Sistemas Electrónicos de Liberación de Nicotina , Fumadores/psicología , Cese del Hábito de Fumar/estadística & datos numéricos , Vapeo , Estudios Transversales , Humanos , Pandemias , SARS-CoV-2 , Fumadores/estadística & datos numéricos , Fumar , Encuestas y CuestionariosRESUMEN
Explicit memory declines with age, but age effects on implicit memory are debated. This issue is important because if implicit memory is age invariant, it may support effective interventions in individuals experiencing memory decline. In this study, we overcame several methodological issues in past research to clarify age effects on implicit memory (priming) and their relationship to explicit memory (recognition, source memory). We (a) recruited a large life-span sample of participants (N = 1,072) during a residency at the Science Museum in London, (b) employed an implicit task that was unaffected by explicit contamination, and (c) systematically manipulated attention and depth of processing to assess their contribution to age effects. Participants witnessed a succession of overlapping colored objects, attending to one color stream and ignoring the other, and identified masked objects at test before judging whether they were previously attended, unattended, or new. Age significantly predicted decline in both explicit and implicit memory for attended items.
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Envejecimiento , Memoria , Reconocimiento en Psicología , Adolescente , Anciano , Atención , Femenino , Humanos , Londres , Masculino , Recuerdo Mental , Adulto JovenRESUMEN
BACKGROUND: E-cigarettes are the most popular aid to smoking cessation attempts in England and the USA. This research examined associations between e-cigarette device characteristics and patterns of use, tobacco-smoking relapse, and smoking abstinence. METHODS: A convenience sample of 371 participants with experience of vaping, and tobacco-smoking abstinence and/or relapse completed an online cross-sectional survey about e-cigarettes. Factors associated with smoking relapse were examined using multiple linear and logistic regression models. RESULTS: Most participants were self-reported long-term abstinent smokers (86.3%) intending to continue vaping. Most initiated e-cigarette use with a vape pen (45.8%) or cig-a-like (38.7%) before moving onto a tank device (89%). Due to missing data, managed through pairwise deletion, only around 70 participants were included in some of the main analyses. Those using a tank or vape pen appeared less likely to relapse than those using a cig-a-like (tank vs. cig-a-like OR = 0.06, 95% CI 0.01-0.64, p = 0.019). There was an inverse association between starting self-reported e-cigarette liquid nicotine concentration and relapse, interacting with device type (OR = 0.79, 95% CI 0.63-0.99, p = 0.047), suggesting that risk of relapse may have been greater if starting with a low e-cigarette liquid nicotine concentration and/or cig-a-like device. Participants reported moving from tobacco-flavored cig-a-likes to fruit/sweet/food flavors with tank devices. CONCLUSIONS: Knowledge of how people have successfully maintained tobacco-smoking abstinence using vaping could help other tobacco smokers wishing to quit tobacco smoking through vaping.
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Sistemas Electrónicos de Liberación de Nicotina , Fumadores/psicología , Fumar/psicología , Fumar Tabaco/prevención & control , Vapeo/psicología , Adulto , Anciano , Estudios Transversales , Femenino , Humanos , Masculino , Persona de Mediana Edad , Nicotina/administración & dosificación , Cese del Hábito de Fumar/psicología , Vapeo/epidemiologíaRESUMEN
The Theory of Nursing for the Whole Person (TNWP) is a wholistic theory that focuses on the integration of body, mind, spirit, individual, family, and community. A qualitative descriptive research study explored Oral Roberts University graduates' perceptions of their use of the TNWP in practice. Analysis revealed six major themes. Respondents felt that the TNWP was a necessary tool to truly care for patients.
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Cristianismo , Programas de Graduación en Enfermería , Liderazgo , Teoría de Enfermería , Humanos , Personal de Enfermería en Hospital , Relaciones Médico-Enfermero , Investigación CualitativaRESUMEN
Presenting events in a rhythm has been shown to enhance perception and facilitate responses for stimuli that appear in synchrony with the rhythm, but little is known about how rhythm during encoding influences later recognition. In this study, participants were presented with images of everyday objects in an encoding phase before a recognition task in which they judged whether or not objects were previously presented. Blockwise, object presentation during encoding followed either a rhythmic (constant, predictable) or arrhythmic (random, unpredictable) temporal structure, of which participants were unaware. Recognition was greater for items presented in a rhythmic relative to an arrhythmic manner. During encoding, there was a differential neural activity based on memory effect with larger positivity for rhythmic over arrhythmic stimuli. At recognition, memory-specific ERP components were differentially affected by temporal structure: The FN400 old/new effect was unaffected by rhythmic structure, whereas the late positive component old/new effect was observed only for rhythmically encoded items. Taken together, this study provides new evidence that memory-specific processing at recognition is affected by temporal structure at encoding.
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Corteza Cerebral/fisiología , Potenciales Evocados/fisiología , Reconocimiento Visual de Modelos/fisiología , Reconocimiento en Psicología/fisiología , Percepción del Tiempo/fisiología , Adulto , Electroencefalografía , Femenino , Humanos , Masculino , Adulto JovenRESUMEN
Older adults often show greater implicit/unconscious memory than young adults for incidental information that was task-irrelevant during its acquisition. Shallow/perceptual encoding by older adults may boost performance on implicit tasks that reinstate this type of processing, whereas deeper/conceptual encoding by young adults may support greater explicit/conscious memory. To test this, young and older participants were exposed to incidental words in a text color identification task before the trial-by-trial capture of priming and recognition. In Experiments 1-3 priming and recognition were significantly greater in young than older adults, providing evidence against age differences in encoding style. In Experiments 2-3 older adults were more liberal than young adults in making positive recognition judgments to incidental relative to intentional items, even though source memory was poor in both groups. Findings pinpoint age differences in the utilization of previously incidental versus intentional information on different types of task.
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Envejecimiento/fisiología , Recuerdo Mental/fisiología , Reconocimiento en Psicología/fisiología , Adulto , Factores de Edad , Anciano , Femenino , Humanos , Masculino , Memoria Implícita/fisiología , Adulto JovenRESUMEN
This study explored the development of understanding of death in a sample of 4- to 11-year-old British children and adults (N=136). It also investigated four sets of possible influences on this development: parents' religion and spiritual beliefs, cognitive ability, socioeconomic status, and experience of illness and death. Participants were interviewed using the "death concept" interview that explores understanding of the subcomponents of inevitability, universality, irreversibility, cessation, and causality of death. Children understood key aspects of death from as early as 4 or 5years, and with age their explanations of inevitability, universality, and causality became increasingly biological. Understanding of irreversibility and the cessation of mental and physical processes also emerged during early childhood, but by 10years many children's explanations reflected not an improved biological understanding but rather the coexistence of apparently contradictory biological and supernatural ideas-religious, spiritual, or metaphysical. Evidence for these coexistent beliefs was more prevalent in older children than in younger children and was associated with their parents' religious and spiritual beliefs. Socioeconomic status was partly related to children's biological ideas, whereas cognitive ability and experience of illness and death played less important roles. There was no evidence for coexistent thinking among adults, only a clear distinction between biological explanations about death and supernatural explanations about the afterlife.
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Desarrollo Infantil/fisiología , Comprensión/fisiología , Formación de Concepto/fisiología , Muerte , Padres/psicología , Religión y Psicología , Adolescente , Adulto , Anciano , Niño , Preescolar , Femenino , Humanos , Masculino , Persona de Mediana Edad , Adulto JovenRESUMEN
BACKGROUND: We have little understanding of how vapers use e-cigarettes beyond cessation. E-cigarettes may have a role to play in reducing the health-related harms of tobacco smoking, through not only assisting smoking cessation attempts but also supporting long-term abstinence from smoking. However, there are fears that vaping may lead to the 'renormalisation' of smoking type behaviours. This study aimed to explore patterns of use and reported experiences of vapers quitting smoking using an e-cigarette in relation to long-term smoking status (abstinence or relapse). METHODS: A purposive sample of 40 UK vapers was matched to a sampling frame of demographic characteristics from a representative sample of UK quitters. Following full informed consent, semi-structured qualitative interviews were conducted. Data were thematically analysed by two members of the research team. Final thematic analysis was verified and agreed by consensus. RESULTS: The sample self-reported long histories of tobacco use and multiple previous quit attempts which had eventually resulted in relapse back to smoking, although a small but important group had never before attempted to quit. Initiating e-cigarette use was experienced as a revelation for some, who were quickly able to fully switch to using e-cigarettes as an alternative to tobacco smoking. For others, periods of dual use or smoking relapse combined with attempts at vaping that were not initially satisfactory. Many of these chose a cheaper 'cig-a-like' device which they found to be inadequate. Experimentation with different devices and different setups, over time, resulted in some 'sliding' rather than switching to vaping. This involved periods of 'dual use'. Some settled on patterns of vaping as a direct substitute of previous tobacco smoking, whereas others reported 'grazing' patterns of vaping throughout the day that were perceived to support tobacco smoking abstinence. CONCLUSIONS: Our data demonstrates that e-cigarettes may be a unique harm reduction innovation for smoking relapse prevention. E-cigarettes meet the needs of some ex-smokers by substituting physical, psychological, social, cultural and identity-related aspects of tobacco addiction. Some vapers reported that they found vaping pleasurable and enjoyable-being more than a substitute but actually preferred, over time, to tobacco smoking. This clearly suggests that vaping is a viable long-term substitute for smoking, with substantial implications for tobacco harm reduction.
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Sistemas Electrónicos de Liberación de Nicotina , Reducción del Daño , Adolescente , Adulto , Distribución por Edad , Anciano , Femenino , Humanos , Masculino , Persona de Mediana Edad , Motivación , Narración , Satisfacción Personal , Prevención Secundaria/métodos , Cese del Hábito de Fumar/métodos , Vapeo/psicología , Adulto JovenRESUMEN
To systematically review the characteristics, validity and outcome measures of tasks that have been described in the literature as assessing pattern separation and pattern completion in humans. Electronic databases were searched for articles. Parameters for task validity were obtained from two reviews that described optimal task design factors to evaluate pattern separation and pattern completion processes. These were that pattern separation should be tested during an encoding task using abstract, never-before-seen visual stimuli, and pattern completion during a retrieval task using partial cues; parametric alteration of the degree of interference of stimuli or degradation of cues should be used to generate a corresponding gradient in behavioral output; studies should explicitly identify the specific memory domain under investigation (sensory/perceptual, temporal, spatial, affect, response, or language) and account for the contribution of other potential attributes involved in performance of the task. A systematic, qualitative assessment of validity in relation to these parameters was performed, along with a review of general validity and task outcome measures. Sixty-two studies were included. The majority of studies investigated pattern separation and most tasks were performed on young, healthy adults. Pattern separation and pattern completion were most frequently tested during a retrieval task using familiar or recognizable visual stimuli and cues. Not all studies parametrically altered the degree of stimulus interference or cue degradation, or controlled for potential confounding factors. This review found evidence that some of the parameters for task validity have been followed in some human studies of pattern separation and pattern completion, but no study was judged to have adequately met all the parameters for task validity. The contribution of these parameters and other task design factors towards an optimal behavioral paradigm is discussed and recommendations for future research are made. © 2015 Wiley Periodicals, Inc.
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Discriminación en Psicología , Reconocimiento en Psicología , Discriminación en Psicología/fisiología , Hipocampo/fisiología , Humanos , Reconocimiento en Psicología/fisiologíaRESUMEN
BACKGROUND: Frailty is widely recognised as a distinct multifactorial clinical syndrome that implies vulnerability. The links between frailty and adverse outcomes such as death and institutionalisation have been widely evidenced. There is currently no gold standard frailty assessment tool; optimizing the assessment of frailty in older people therefore remains a research priority. The objective of this systematic review is to identify existing multi-component frailty assessment tools that were specifically developed to assess frailty in adults aged ≥60 years old and to systematically and critically evaluate the reliability and validity of these tools. METHODS: A systematic literature review was conducted using the standardised COnsensus-based Standards for the selection of health Measurement INstruments (COSMIN) checklist to assess the methodological quality of included studies. RESULTS: Five thousand sixty-three studies were identified in total: 73 of which were included for review. 38 multi-component frailty assessment tools were identified: Reliability and validity data were available for 21 % (8/38) of tools. Only 5 % (2/38) of the frailty assessment tools had evidence of reliability and validity that was within statistically significant parameters and of fair-excellent methodological quality (the Frailty Index-Comprehensive Geriatric Assessment [FI-CGA] and the Tilburg Frailty Indicator [TFI]). CONCLUSIONS: The TFI has the most robust evidence of reliability and validity and has been the most extensively examined in terms of psychometric properties. However, there is insufficient evidence at present to determine the best tool for use in research and clinical practice. Further in-depth evaluation of the psychometric properties of these tools is required before they can fulfil the criteria for a gold standard assessment tool.
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Anciano Frágil/psicología , Evaluación Geriátrica/métodos , Psicometría/métodos , Anciano de 80 o más Años , Humanos , Reproducibilidad de los ResultadosRESUMEN
Onchocerciasis (river blindness), caused by the filarial nematode Onchocerca volvulus, is a major cause of visual impairment and dermatitis in sub-Saharan Africa. As O. volvulus contains an obligatory bacterial symbiont (Wolbachia), it is susceptible to antibiotic chemotherapy, although current regimens are considered too prolonged for community-level control programs. The aim of this study was to compare the efficacies of oxytetracycline and rifampin, administered separately or in combination, against a close relative of O. volvulus (Onchocerca ochengi) in cattle. Six animals per group were treated with continuous or intermittent oxytetracycline regimens, and effects on adult worm viability, dermal microfilarial loads, and Wolbachia density in worm tissues were assessed. Subsequently, the efficacies of 3-week regimens of oxytetracycline and rifampin alone and a combination regimen were compared, and rifampin levels in plasma and skin were quantified. A 6-month regimen of oxytetracycline with monthly dosing was strongly adulticidal, while 3-week and 6-week regimens exhibited weaker adulticidal effects. However, all three regimens achieved >2-log reductions in microfilarial load. In contrast, rifampin monotherapy and oxytetracycline-rifampin duotherapy failed to induce substantive reductions in either adult worm burden or microfilarial load, although a borderline effect on Wolbachia density was observed following duotherapy. Dermal rifampin levels were maintained above the MIC for >24 h after a single intravenous dose. We conclude that oxytetracycline-rifampin duotherapy is less efficacious against O. ochengi than oxytetracycline alone. Further studies will be required to determine whether rifampin reduces oxytetracycline bioavailability in this system, as suggested by human studies using other tetracycline-rifampin combinations.