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1.
Am J Addict ; 30(1): 11-20, 2021 01.
Artigo em Inglês | MEDLINE | ID: mdl-32424883

RESUMO

BACKGROUND AND OBJECTIVES: Treatment guidelines emphasize patients' readiness for transitioning from opiate substitution treatment (OST) to opiate withdrawal and abstinence. Psychological preparedness indicators for this transition were examined. METHODS: Patients (all male) were recruited from three treatment settings: prison, an inpatient detoxification unit, and an outpatient clinic. Time 1 (T1) was admission to methadone-assisted withdrawal in all settings. Time 2 (T2) was a 6-month follow-up. With n = 24 at T1 for each group (N = 72), a battery of instruments relevant to psychological preparedness was administered. RESULTS: At T1, inpatients had higher self-efficacy beliefs for successful treatment completion than prison patients. For patients contactable at T2, T1 self-efficacy positively predicted T2 opiate abstinence. No other variable improved prediction. T1 SOCRATES (Stages of Change Readiness and Treatment Eagerness Scale) ambivalence scores, age, and lifetime heroin use duration predicted maintenance of contact or not with treatment services and contactability by the researcher. Measures of mood did not differ between groups at T1 or predict T2 outcomes. DISCUSSION AND CONCLUSIONS: Self-efficacy beliefs are a potentially useful indicator of readiness for transitioning from OST to a medically assisted opiate withdrawal and subsequent abstinence. Ambivalence regarding change, age, and lifetime heroin use duration are potentially useful predictors of patients maintaining contact with services, and of being retained in research. SCIENTIFIC SIGNIFICANCE: These findings advance existing literature and knowledge by highlighting the importance of self-efficacy in psychological preparedness for opiate abstinence, and the predictive utility to clinicians of this and other variables measurable at admission, in the clinical management of opiate users. (© 2020 The Authors. The American Journal on Addictions published by Wiley Periodicals LLC on behalf of The American Academy of Addiction Psychiatry). (Am J Addict 2021;30:11-20).


Assuntos
Analgésicos Opioides/uso terapêutico , Desprescrições , Dependência de Heroína/tratamento farmacológico , Metadona/uso terapêutico , Autoeficácia , Síndrome de Abstinência a Substâncias/psicologia , Adulto , Analgésicos Opioides/efeitos adversos , Heroína , Humanos , Pacientes Internados , Masculino , Metadona/efeitos adversos , Pessoa de Meia-Idade , Tratamento de Substituição de Opiáceos , Pacientes Ambulatoriais , Prisioneiros , Síndrome de Abstinência a Substâncias/etiologia
2.
Med Teach ; 36(11): 997-1004, 2014 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-24804910

RESUMO

INTRODUCTION: This study compared Specialist Trainees' (STs) hand-selected multi-source feedback (MSF) scores with those made by their clinical supervisors and explored perceptions of both those being assessed and those assessing. METHODS: Participating STs were asked to hand a mini-PAT questionnaire to a clinical colleague of their choice and also to their Clinical Supervisor. Statistical analysis was carried out on submitted paired assessments to determine any differences in responses between clinical supervisors and hand-chosen assessors. Semi-structured interviews were held with seven nurses, seven Consultants and six postgraduate doctors. RESULTS: Forty pairs of mini-PAT questionnaires were analysed. Hand-chosen assessors' ratings were significantly higher than those for clinical supervisors with respect to: "good clinical care" (p < 0.01), "good medical practice" (p < 0.05), "teaching and training" (p < 0.01), "relationship with patients" (p < 0.05) as well as for overall impression of the trainee (p < 0.05). Five themes were identified from interviews: validity of selecting assessors; anonymity of assessors; usefulness of feedback; the value of multi-professional assessors; and grading. DISCUSSIONS: There is a systematic difference in the assessment scores for trainees in MSF between clinical supervisors and hand-chosen assessors, the former scoring trainees more harshly. Grading was open to interpretation. This raised questions, especially from nurse interviewees regarding appropriate benchmarking.


Assuntos
Educação de Pós-Graduação em Medicina/métodos , Avaliação Educacional/métodos , Retroalimentação , Competência Clínica , Humanos , Reprodutibilidade dos Testes
3.
Res Sports Med ; 22(1): 36-48, 2014.
Artigo em Inglês | MEDLINE | ID: mdl-24392770

RESUMO

The purpose of this investigation was to assess the number of test-retest trials required to familiarize participants in order to provide acceptable reliability for the measurement of an eye-hand coordination task using the Sport Vision Trainer (SVT). Two schedules were conducted (S1 and S2). For S1, 64 participants (male n = 51, age 20.8 ± 4.9 years; female n = 13, age 20.1 ± 2.1 years) attended four sessions each 1 week apart, and undertook four trials using the SVT. For S2, 60 participants (male n = 46, age 20.8 ± 4.9 years; female n = 14, age 20.1 ± 2.1 years) attended one 20-minute schedule consisting of four consecutive trials using the SVT. Limits of agreement (LoA) analyses showed that absolute reliability was increased in both studies. The LoA for S2 indicate that error decreased between trial 1-2, 2-3, and 3-4; ± 0.95 (CI, -1.16, +2.56sec), ± 0.97 (CI, -1.66, +2.14sec), ± 0.69 (CI, -1.08, +1.62sec). It was concluded that reliable measurements of eye-hand coordination can be obtained using the SVT in one session.


Assuntos
Mãos/fisiologia , Fenômenos Fisiológicos Oculares , Desempenho Psicomotor/fisiologia , Esportes/educação , Esportes/fisiologia , Feminino , Humanos , Masculino , Reprodutibilidade dos Testes , Análise e Desempenho de Tarefas , Adulto Jovem
4.
Eur J Orthop Surg Traumatol ; 24(7): 1193-6, 2014 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-23989803

RESUMO

Hip fractures are a significant cause of mortality and morbidity in the elderly. It is important to identify factors that predict an increased mortality following hip fracture. The aim of this study was to identify significant predictors of mortality at 6 and 12 months following hip fractures. Three hundred patients above the age of 65 were identified who were admitted in to the hospital with fracture neck of femur. Two hundred and seventy-four patients were operated and were included into the study. Variables collected were age, gender, significant comorbidities, admission albumin level and admission total lymphocyte count (TLC). Admission time and subsequent time to surgery were also analysed. Our study showed that albumin and TLC were found to be the only clearly significant mortality predictors at 12 months and a delay of up to 4 days to surgery does not significantly increase the mortality at 12 months.


Assuntos
Fraturas do Colo Femoral/sangue , Fraturas do Colo Femoral/mortalidade , Contagem de Linfócitos , Albumina Sérica/análise , Tempo para o Tratamento , Idoso , Idoso de 80 Anos ou mais , Feminino , Fraturas do Colo Femoral/cirurgia , Mortalidade Hospitalar , Humanos , Masculino , Fatores de Risco , Fatores Sexuais , Fatores de Tempo
5.
Nutrients ; 16(4)2024 Feb 06.
Artigo em Inglês | MEDLINE | ID: mdl-38398799

RESUMO

Negative health consequences of obesity include impaired neuronal functioning and cell death, thus bringing the risk of impaired cognitive functioning. Antioxidant properties of polyphenols offer a possible intervention for overweight people, but evidence for their effectiveness in supporting cognitive functioning is mixed. This review examined evidence from randomized controlled trials concerning the effect of polyphenols on tasks requiring either immediate or delayed retrieval of learned information, respectively, thus controlling for differences in cognitive processes and related neural substrates supporting respective task demands. Searches of the PubMed/Medline, PsycInfo, and Scopus databases identified 24 relevant primary studies with N = 2336 participants having a BMI ≥ 25.0 kg/m2. The participants' mean age for the 24 studies exceeded 60 years. Respective meta-analyses produced a significant summary effect for immediate retrieval but not for delayed retrieval. The present findings support a potential positive effect of chronic supplementation with polyphenols, most notably flavonoids, on immediate retrieval in participants aged over 60 years with obesity being a risk factor for cognitive impairment. We recommend further investigation of this potential positive effect in participants with such risk factors. Future research on all populations should report the phenolic content of the supplementation administered and be specific regarding the cognitive processes tested.


Assuntos
Suplementos Nutricionais , Obesidade , Sobrepeso , Polifenóis , Humanos , Polifenóis/farmacologia , Polifenóis/administração & dosagem , Memória/efeitos dos fármacos , Pessoa de Meia-Idade , Cognição/efeitos dos fármacos , Feminino , Masculino , Idoso , Ensaios Clínicos Controlados Aleatórios como Assunto , Adulto , Antioxidantes/administração & dosagem
6.
PLoS One ; 18(5): e0286143, 2023.
Artigo em Inglês | MEDLINE | ID: mdl-37228106

RESUMO

BACKGROUND AND OBJECTIVES: Increasing evidence indicates a link between obesity and cognitive impairment. Furthermore, there is limited literature regarding the effect of polyphenols, a plant derived compounds, on executive functioning in an overweight/obese population at-risk of cognitive impairment. The aim of the present systematic review and meta-analysis of randomized controlled trials is to examine the effect of polyphenol supplementation on executive functions in overweight and/or obese populations at risk of cognitive impairment. METHODS: A comprehensive literature search was conducted from inception to March 2023 using four electronic databases: PubMed/Medline, PsycInfo, Scopus and Cochrane trials library. Published primary research studies in English that compared the effect of polyphenols with placebo on executive function in overweight/obese adults were considered eligible for the meta-analysis. Jadad scale was used for the methodological quality rating of the included studies. Hedges g with 95% confidence intervals (CI) for endpoints were calculated using random effect model where applicable. Rosenthal's Fail-safe N, funnel plots, the Begg and Mazumdar's rank correlation test (Kendall's S statistic P-Q), Egger's linear regression test, and Duval and Tweedie's trim-and-fill test were identified for potential use as appropriate, to examine publication bias. Sensitivity analysis was conducted to examine the robustness of the results. RESULTS AND CONCLUSION: A total of 23 RCT studies involving N = 1,976 participants were included in the review. The results of the meta-analysis revealed a non-significant effect for polyphenol supplementation on executive function (g = 0.076, CI = -0.018 to 0.170). Observations from primary studies within the meta-analysis showed a potential positive effect of polyphenol supplementation in a younger population at-risk of cognitive impairment and it is recommended to investigate this further in future studies. Moreover, the variability of the tasks used to examine executive functions as well as the adequate reporting of supplement's phenolic composition is a limitation that future work should also consider.


Assuntos
Disfunção Cognitiva , Sobrepeso , Adulto , Humanos , Sobrepeso/complicações , Sobrepeso/psicologia , Função Executiva , Polifenóis/farmacologia , Polifenóis/uso terapêutico , Obesidade/complicações , Disfunção Cognitiva/tratamento farmacológico , Suplementos Nutricionais
7.
Hum Psychopharmacol ; 27(2): 113-38, 2012 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-22389076

RESUMO

To review, with meta-analyses where appropriate, performance differences between ecstasy (3,4-methylenedioxymethamphetamine) users and non-users on a wider range of visuospatial tasks than previously reviewed. Such tasks have been shown to draw upon working memory executive resources. Abstract databases were searched using the United Kingdom National Health Service Evidence Health Information Resource. Inclusion criteria were publication in English language peer-reviewed journals and the reporting of new findings regarding human ecstasy-users' performance on visuospatial tasks. Data extracted included specific task requirements to provide a basis for meta-analyses for categories of tasks with similar requirements. Fifty-two studies were identified for review, although not all were suitable for meta-analysis. Significant weighted mean effect sizes indicating poorer performance by ecstasy users compared with matched controls were found for tasks requiring recall of spatial stimulus elements, recognition of figures and production/reproduction of figures. There was no evidence of a linear relationship between estimated ecstasy consumption and effect sizes. Given the networked nature of processing for spatial and non-spatial visual information, future scanning and imaging studies should focus on brain activation differences between ecstasy users and non-users in the context of specific tasks to facilitate identification of loci of potentially compromised activity in users.


Assuntos
Alucinógenos/efeitos adversos , Memória de Curto Prazo/efeitos dos fármacos , N-Metil-3,4-Metilenodioxianfetamina/efeitos adversos , Animais , Função Executiva/efeitos dos fármacos , Alucinógenos/administração & dosagem , Humanos , Transtornos da Memória/induzido quimicamente , Rememoração Mental/efeitos dos fármacos , N-Metil-3,4-Metilenodioxianfetamina/administração & dosagem , Transtornos Relacionados ao Uso de Substâncias/fisiopatologia
8.
Hum Psychopharmacol ; 27(2): 187-99, 2012 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-22389083

RESUMO

BACKGROUND: Previous investigations of executive function in alcohol dependent and in social drinkers have not always produced consistent results and have not utilised key indicators of recent theoretical models of Executive Function (EF). The present paper reports the results of two studies that seek to address these limitations. METHOD: Study 1 took the form of a systematic review and meta-analysis of studies examining EF in social drinkers. In Study 2, 41 participants completed an alcohol use inventory and were assigned to either light or heavy alcohol use via median split of average weekly dose. Participants completed measures of the fractionated executive processes of updating, shifting, inhibition and access to semantic memory. RESULTS: Study 1 only identified seven studies of EF in social drinkers, and the mean effect size was non-significant. In study 2, the heavy alcohol use group performed worse on all measures of executive functioning except memory updating. CONCLUSIONS: To our knowledge, this is the first systematic investigation of executive functioning in social drinkers. Given that the participants were non-treatment seeking social drinking students, the EF deficit in the heavy user group is particularly worrying and could increase the likelihood of developing an alcohol use disorder.


Assuntos
Consumo de Bebidas Alcoólicas/efeitos adversos , Etanol/efeitos adversos , Função Executiva/efeitos dos fármacos , Consumo de Bebidas Alcoólicas/epidemiologia , Transtornos Relacionados ao Uso de Álcool/epidemiologia , Etanol/administração & dosagem , Humanos , Memória/efeitos dos fármacos , Comportamento Social
9.
Palliat Med ; 26(2): 123-31, 2012 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-21383059

RESUMO

Many patients with the terminal condition motor neurone disease/amyotrophic lateral sclerosis (MND/ALS) do not access social service homecare, which may have implications for the location of end-of-life care. We aimed to identify factors related to uptake of such care in MND/ALS. A case note review of patients at a UK MND/ALS clinic (N = 97) provided data concerning disease onset and severity, demographic variables and care received. Narrative interviews with people with MND/ALS (N = 24) and family carers (N = 18) explored their perspectives on social services homecare. Quantitative analyses highlighted the role of increasing disease severity and age for social services homecare uptake. However, qualitative findings revealed a number of barriers delaying the uptake of such care. 'Internal' issues focused on retaining control and normality within the home. 'External' issues arose from limited understanding of the disease amongst service providers and lack of awareness of service entitlement amongst patients and carers. Multiple factors are implicated in the uptake of social services homecare. Uncertainties surrounding service entitlement must be addressed, including the simplification of bureaucratic procedures and clarification of the roles of health and social care professionals. Service providers need a greater awareness of the nature of the disease and their role in its management.


Assuntos
Esclerose Lateral Amiotrófica/psicologia , Esclerose Lateral Amiotrófica/terapia , Serviços de Assistência Domiciliar/estatística & dados numéricos , Cuidados Paliativos/psicologia , Fatores Etários , Progressão da Doença , Estudos de Avaliação como Assunto , Acessibilidade aos Serviços de Saúde , Serviços de Assistência Domiciliar/normas , Humanos , Doença dos Neurônios Motores , Cuidados Paliativos/estatística & dados numéricos , Qualidade da Assistência à Saúde , Serviço Social/educação , Serviço Social/normas
10.
Health Policy ; 126(7): 688-692, 2022 07.
Artigo em Inglês | MEDLINE | ID: mdl-35644721

RESUMO

BACKGROUND: COVID-19 shocked global healthcare systems, particularly the surgical services, resulting in a significant backlog of patients with waiting times not expected to return to pre-pandemic levels until 2025. The Royal College of Surgeons has recommended a wider use of virtual clinics to meet the increased demand. The efficacy of virtual follow up is well documented in the literature; however, there is very little evidence of the role of virtual clinics in the assessment of new elective patients. METHODS: Observational study comparing clinical outcomes of new patients electively referred to orthopaedic virtual clinics between January and February 2021 with face-to-face clinics in January and February 2020. RESULTS: Over the equivalent time frame, more patients were reviewed in virtual clinics compared to traditional face-to-face (821 vs 499). However, virtual clinics lead to significantly more patients being brought back for follow up (78.3% vs 37.3%) and fewer patients received outcomes that progressed their journey towards a definitive intervention or discharge. CONCLUSION: The overall benefit of virtual clinic appointments in the context of reviewing new patients remains to be proven. Despite increasing use of virtual clinics in the National Health Service, we have shown a potential delay to patients' clinical progression, ultimately delaying healthcare delivery. Potential methods to improve the benefit of virtual clinics are proposed.


Assuntos
COVID-19 , Ortopedia , Instituições de Assistência Ambulatorial , Humanos , Pandemias , Medicina Estatal
11.
Hum Psychopharmacol ; 26(7): 460-9, 2011 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-21898599

RESUMO

This study aimed to examine the relationship between the consumption of ecstasy (3,4-methylenedioxymethamphetamine (MDMA)) and cannabis, and performance on the random letter generation task which generates dependent variables drawing upon executive inhibition and access to semantic long-term memory (LTM). The participant group was a between-participant independent variable with users of both ecstasy and cannabis (E/C group, n = 15), users of cannabis but not ecstasy (CA group, n = 13) and controls with no exposure to these drugs (CO group, n = 12). Dependent variables measured violations of randomness: number of repeat sequences, number of alphabetical sequences (both drawing upon inhibition) and redundancy (drawing upon access to semantic LTM). E/C participants showed significantly higher redundancy than CO participants but did not differ from CA participants. There were no significant effects for the other dependent variables. A regression model comprising intelligence measures and estimates of ecstasy and cannabis consumption predicted redundancy scores, but only cannabis consumption contributed significantly to this prediction. Impaired access to semantic LTM may be related to cannabis consumption, although the involvement of ecstasy and other stimulant drugs cannot be excluded here. Executive inhibitory functioning, as measured by the random letter generation task, is unrelated to ecstasy and cannabis consumption.


Assuntos
Função Executiva/efeitos dos fármacos , Abuso de Maconha/complicações , Memória/efeitos dos fármacos , N-Metil-3,4-Metilenodioxianfetamina/efeitos adversos , Adolescente , Adulto , Estudos Transversais , Feminino , Alucinógenos/efeitos adversos , Humanos , Masculino , Análise de Regressão , Adulto Jovem
12.
Neuropsychobiology ; 60(3-4): 159-75, 2009.
Artigo em Inglês | MEDLINE | ID: mdl-19893333

RESUMO

AIMS: This review examined studies of executive functioning in abstinent ecstasy (3,4-methylenedioxymethamphetamine, MDMA) users on tasks which had been empirically mapped onto updating, shifting, inhibition and accessing long-term memory executive processes. Studies of some aspects of visuospatial memory performance were also included because of the investment of executive resources in such tasks. METHODS: Thirty-three studies were identified for the review following searches of the Psychinfo and Medline databases. Inclusion criteria were the reporting of new empirical findings from participants drug free at the time of testing, in peer-reviewed journals in the English language. RESULTS: Evidence for ecstasy-related performance deficits was strongest for the updating of verbal material, and for visuospatial memory tasks requiring additional processing beyond storage and retrieval. Such processing suggested that the overall level of executive demand was an important consideration. Executive shifting showed little evidence of ecstasy-related impairment, whilst examination of inhibition and long-term memory access presented an unclear picture. CONCLUSIONS: All but one of the studies had a cross-sectional design. Although this is a potential weakness with regard to confounds, the necessity of such designs was acknowledged. Studies were generally aware of the need to control for potential confounds, especially the effects of other drugs, through a mixture of group designs and statistical techniques. It was recommended that future studies of executive functioning in ecstasy users should detail the relationship of the tasks and dependent variables reported to specific executive processes and consider the level of executive demand imposed by such tasks.


Assuntos
Função Executiva/efeitos dos fármacos , Alucinógenos/toxicidade , Transtornos da Memória/induzido quimicamente , Memória de Curto Prazo/efeitos dos fármacos , N-Metil-3,4-Metilenodioxianfetamina/toxicidade , Humanos
13.
J Subst Abuse Treat ; 92: 91-98, 2018 09.
Artigo em Inglês | MEDLINE | ID: mdl-30032950

RESUMO

BACKGROUND AND AIMS: High drug related mortality amongst former prisoners in the 4 weeks following release is an internationally recognised problem. Naltrexone injections at release could diminish this by blockading opioid receptors, but naltrexone is not licensed for injection for treating opiate misuse in the United Kingdom and some other countries. This study examined the likelihood of accepting a naltrexone injection at release, and the relationship of this likelihood to other relevant variables. METHOD: Sixty-one male prisoners with a history of heroin use, who were approaching release from two prisons in the north-west of England, provided likelihood ratings for accepting a naltrexone injection if it were to have been available. Additional data was gathered regarding demographic and drug use histories, and also from psychometric instruments relevant to drug misuse and treatment preparedness. RESULTS: Maximum likelihood ratings for accepting a naltrexone injection were recorded by 55.7% of the sample with only 9.8% indicating no likelihood of accepting an injection. Likelihood ratings were positively related to serving a current sentence for an acquisitive offence compared to drug related or violence offences, and negatively related to peak methadone dosages during the current sentence. CONCLUSIONS: Although naltrexone injections were not available to participants in this study, the findings suggest that the potential uptake for this intervention is sufficient to warrant a clinical trial with this population of British prisoners, with a view to potential changes to its current licencing status. However, the importance of individual patient readiness for such an abstinence orientated intervention is emphasised by the negative correlation between the likelihood ratings and recent methadone doses.


Assuntos
Dependência de Heroína/reabilitação , Naltrexona/administração & dosagem , Antagonistas de Entorpecentes/administração & dosagem , Prisioneiros/estatística & dados numéricos , Adulto , Relação Dose-Resposta a Droga , Inglaterra , Dependência de Heroína/mortalidade , Humanos , Injeções , Funções Verossimilhança , Masculino , Metadona/administração & dosagem , Pessoa de Meia-Idade , Aceitação pelo Paciente de Cuidados de Saúde , Adulto Jovem
14.
J Psychopharmacol ; 20(3): 447-55, 2006 May.
Artigo em Inglês | MEDLINE | ID: mdl-16574719

RESUMO

This self-report questionnaire study examined ecstasy users' perceptions of the risks associated with their use of ecstasy, their precautions against such risks, and its perceived effects on their lives. Gender differences in these areas were also explored. The sample comprised 328 ecstasy users (139 female, 187 male, one transsexual) with a mean age of 22.5 years (SD = 4.9 years). Questionnaires were completed either in hard copy or through a website concerned with ecstasy use. The results showed that friends were the most common source of information about ecstasy for the sample overall, although females were more likely to utilize this source than males. None of the five categories of perceived risk (e.g. psychiatric, physical) showed a significant gender difference. Males were more likely to take rest breaks whilst females were more likely to limit consumption as a precaution against harm. Three factors emerged from a principal components analysis concerning perceived personal change since initiation of ecstasy use. Factor 1 (23.8% of the variance) concerned negative experiences (e.g. depression). Factor 2 (22.0% of the variance) concerned positive personal qualities (e.g. caring). Factor 3 (10.5% of the variance) concerned selective aspects of functioning (e.g. alertness). The pattern of Factor 1 and Factor 2 scores over time suggested that 6 years since initiation of ecstasy use might be a time when some long-term users may be open to reassess their use of the drug. Broader implications of the findings for health education initiatives aimed at ecstasy users are discussed.


Assuntos
Transtornos Relacionados ao Uso de Anfetaminas/complicações , Atitude Frente a Saúde , Drogas Ilícitas/efeitos adversos , N-Metil-3,4-Metilenodioxianfetamina/efeitos adversos , Inquéritos e Questionários , Adolescente , Adulto , Transtornos Relacionados ao Uso de Anfetaminas/psicologia , Relação Dose-Resposta a Droga , Feminino , Redução do Dano , Humanos , Masculino , Medição de Risco
15.
Psychopharmacology (Berl) ; 181(3): 550-9, 2005 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-16025320

RESUMO

RATIONALE/OBJECTIVES: Previous research has shown that ecstasy users are impaired in thinking and reasoning. The present study sought to explore the possibility that syllogistic reasoning errors in ecstasy users were due to an inability to construct a model of the premises due to working memory limitations. METHODS: Twenty-nine ecstasy users and 25 nonecstasy user controls completed abstract syllogistic reasoning problems varying in difficulty. Pairs of premises were provided, and participants were required to generate conclusions that followed necessarily from them. RESULTS: On the easier problems, both groups performed at well above chance although nonusers achieved significantly more correct responses. Consistent with existing research, on the more difficult problems, errors by nonusers were characterised by incorrect conclusions suggesting that while nonusers have the working memory capacity to construct a single model of the premises, this is not an exhaustive representation and usually results in an erroneous conclusion. On the other hand, for all problem types, ecstasy users, rather than produce incorrect responses, were more likely to fail to generate a conclusion. CONCLUSIONS: The present results are consistent with the possibility that ecstasy users with their reduced working memory capacity may experience difficulty in constructing even a single model of the premises. While this might be attributable to the effects of 3,4-methlylenedioxymethamphetamine neurotoxicity, many of the ecstasy users in the present study were polydrug users. Thus, the possibility that other drugs including cannabis and cocaine might contribute to the present results cannot be excluded.


Assuntos
Drogas Ilícitas , Memória de Curto Prazo/efeitos dos fármacos , N-Metil-3,4-Metilenodioxianfetamina , Resolução de Problemas/efeitos dos fármacos , Transtornos Relacionados ao Uso de Substâncias/psicologia , Adulto , Transtornos Relacionados ao Uso de Anfetaminas/psicologia , Atenção/efeitos dos fármacos , Transtornos Relacionados ao Uso de Cocaína/psicologia , Feminino , Humanos , Masculino , Abuso de Maconha/psicologia , Estatística como Assunto
16.
Exp Clin Psychopharmacol ; 13(2): 137-45, 2005 May.
Artigo em Inglês | MEDLINE | ID: mdl-15943546

RESUMO

Previous research has demonstrated working memory and executive deficits in recreational users of MDMA (3,4-methylenedioxymethamphetamine; Ecstasy). In turn, both of these constructs have been implicated in syllogistic reasoning performance. Twenty-two MDMA users (mean age = 21.36) and 26 MDMA nonuser controls (mean age = 21.31) were tested on syllogisms of varying difficulty and on measures of working memory and executive functioning. MDMA users were significantly impaired in aspects of syllogistic reasoning, and the effect remained significant after the authors controlled for the use of other drugs. However, the MDMA-related variance was reduced to below statistical significance following control for group differences in working memory span. The results are consistent with the possibility that MDMA-related deficits in aspects of executive functioning result in impaired reasoning performance among MDMA users.


Assuntos
Alucinógenos/farmacologia , Processos Mentais/efeitos dos fármacos , N-Metil-3,4-Metilenodioxianfetamina/farmacologia , Adolescente , Adulto , Feminino , Humanos , Testes de Inteligência , Lógica , Masculino , Memória de Curto Prazo/efeitos dos fármacos , Desempenho Psicomotor/efeitos dos fármacos , Sono/efeitos dos fármacos
17.
Foot (Edinb) ; 25(4): 235-7, 2015 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-26362235

RESUMO

INTRODUCTION: Intractable plantar fasciitis can be a difficult condition to treat. Early results of platelet rich plasma (PRP) injection have been promising. We compared PRP to traditional cortisone injection in the treatment of chronic cases of plantar fasciitis resistant to traditional nonoperative management. The aim of the study was to compare the efficacy of PRP to that of Steroid at 3, 6 and 12 months after injection. METHODS: 60 heels with intractable plantar fasciitis who had failed conservative treatment were randomised to receive either PRP or Steroid injection. All patients were assessed with the Roles-Maudsley (RM) Score, Visual Analogue Score (VAS) for pain and the American Orthopaedic Foot and Ankle Society (AOFAS) score. Data was collected prospectively on the cohort, pre-treatment, at 3, 6 and 12 months post injection and the results were compared. RESULTS: Pre-injection, the two groups were well matched with no statistically significant difference. At 3 months, all three outcome scores had significantly improved from their pretreatment level in both groups. The scores in the Steroid arm were marginally better than in the PRP arm, but this difference was not statistically significant. At 6 months, there was no statistically significant difference between the two groups, though there was a trend for the PRP scores to become better than the Steroid scores. At 12 months, the RM, VAS and AOFAS scores in the PRP arm (1.9, 3.3 and 88.5) were significantly better than the Steroid arm (2.6, 5.3 and 75) with P values of .013, .028 and .033, respectively. CONCLUSIONS: PRP is as effective as Steroid injection at achieving symptom relief at 3 and 6 months after injection, for the treatment of plantar fasciitis, but unlike Steroid, its effect does not wear off with time. At 12 months, PRP is significantly more effective than Steroid, making it better and more durable than cortisone injection.


Assuntos
Gerenciamento Clínico , Fasciíte Plantar/terapia , Glucocorticoides/administração & dosagem , Medição da Dor/métodos , Dor/etiologia , Plasma Rico em Plaquetas , Adulto , Idoso , Doença Crônica , Relação Dose-Resposta a Droga , Fasciíte Plantar/complicações , Feminino , Seguimentos , Humanos , Injeções , Masculino , Pessoa de Meia-Idade , Dor/diagnóstico , Estudos Prospectivos , Resultado do Tratamento
18.
Psychopharmacology (Berl) ; 173(3-4): 391-7, 2004 May.
Artigo em Inglês | MEDLINE | ID: mdl-14735294

RESUMO

RATIONALE: Previous studies have presented conflicting findings regarding visuospatial span deficits in MDMA ('ecstasy') users, possibly attributable to a lack of distinction between simple visuospatial span and visuospatial working memory span. Both draw upon central executive processing, while the latter also involves concurrent goal-orientated visuospatial processing. OBJECTIVES: This study compared visuospatial working memory span for MDMA users and controls. An additional concurrent task also loading on the central executive tested for inter-group differences related to central executive workload. METHOD: MDMA user group (25 current users, 10 previous users and 18 non-users) was between-participants, and dual task condition (concurrent alphabetic generation, random letter generation, and no dual task) was within-participants. The visuospatial working memory task required participants to serially recall a spatial sequence while simultaneously completing a visual judgement task, and was completed on its own and under dual task conditions. RESULTS: Overall, non-users performed significantly better than both MDMA user groups. However, contrary to expectation, the performance decrement among users was no worse with concurrent random generation than under control conditions. Analyses controlling for background variables and the use of other drugs in the previous 3 months showed that the main effect of MDMA remained significant following control for intelligence, alcohol, amphetamines and cocaine, among other potential confounds. Unclear results were found following control for cannabis use. CONCLUSIONS: The MDMA users experienced deficits in visuospatial working memory span. The lack of interaction between dual task condition and user group may be due to inter-group differences in central executive utilisation under different task conditions.


Assuntos
Memória/efeitos dos fármacos , N-Metil-3,4-Metilenodioxianfetamina/efeitos adversos , Percepção Espacial/efeitos dos fármacos , Adulto , Feminino , Humanos , Masculino
19.
Psychol Addict Behav ; 17(2): 167-70, 2003 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-12814282

RESUMO

Admission scores from a model comprising 3 motivation factors concerning the cessation of heroin use and a confidence scale concerning postdischarge abstinence were tested for their ability to predict postdischarge outcomes in patients beginning inpatient opiate detoxification. Statistically significant prediction of abstinence from heroin 30 days after discharge and the number of heroin-free days in the 3 months following admission was based on the confidence scale and a factor concerned with externally imposed constraints on continued heroin use. The single-scale confidence measure made the largest contribution to each prediction, indicating that such scales may be potentially useful outcome predictors for postdischarge abstinence. External constraints on heroin use may not provide a basis for success in this treatment modality.


Assuntos
Dependência de Heroína/epidemiologia , Dependência de Heroína/reabilitação , Motivação , Cooperação do Paciente/estatística & dados numéricos , Alta do Paciente , Autoeficácia , Adulto , Feminino , Humanos , Masculino , Estudos Prospectivos , Análise de Regressão , Inquéritos e Questionários
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