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https://www.readbyqxmd.com/read/28521961/placebo-effect-and-therapeutic-context-a-challenge-in-clinical-research
#1
REVIEW
Antoni Morral, Gerard Urrutia, Xavier Bonfill
When we apply a physical or pharmacological treatment, there are many things that may explain the clinical improvement experienced by a patient. The drugs or physical agents applied are important, but we must also add other elements in the context of the patient-therapist relationship. Scientific evidence has proven that the placebo effect exists. This is a true biopsychosocial phenomenon produced by the context in which an intervention is carried out. Biases aside, placebo and nocebo responses are changes in patients' symptoms, due to their participation at the therapeutic meeting, with its rituals, symbols and interactions...
May 15, 2017: Medicina Clínica
https://www.readbyqxmd.com/read/28497895/in-the-face-of-pain-the-choice-of-visual-cues-in-pain-conditioning-matters
#2
N Egorova, J Park, J Kong
BACKGROUND: Visual cue conditioning is a valuable experimental paradigm to investigate placebo and nocebo effects in pain. However, little attention has been paid to the cues themselves and potential variability of effects (their quantity and quality) stemming from the choice of stimuli. Yet, this seemingly methodological question has important implications for the interpretation of experimental findings in terms of their significance for clinical practice. METHODS: We investigated the effect of heat pain conditioning using different types of visual cues (abstract images, faces and pseudo-words) in a group of 22 healthy volunteers...
May 12, 2017: European Journal of Pain: EJP
https://www.readbyqxmd.com/read/28490647/placebo-and-nocebo-responses-in-restless-legs-syndrome-a-systematic-review-and-meta-analysis
#3
Maria A Silva, Gonçalo S Duarte, Raquel Camara, Filipe B Rodrigues, Ricardo M Fernandes, Daisy Abreu, Tiago Mestre, João Costa, Claudia Trenkwalder, Joaquim J Ferreira
OBJECTIVE: To estimate the placebo and nocebo responses in restless legs syndrome (RLS) and explore their determinants. METHODS: Databases were searched up to October 2015. Randomized, double-blind, placebo-controlled trials of patients with RLS were included if quantitative data were extractable in the placebo arm. Placebo response was defined as the within-group change from baseline, using any scale measuring RLS severity or disability. Nocebo response was defined as the proportion of patients experiencing adverse events in the placebo arm...
May 10, 2017: Neurology
https://www.readbyqxmd.com/read/28476289/statin-associated-muscle-symptoms-beware-of-the-nocebo-effect
#4
Juan Pedro-Botet, Juan Rubiés-Prat
No abstract text is available yet for this article.
May 2, 2017: Lancet
https://www.readbyqxmd.com/read/28476288/adverse-events-associated-with-unblinded-but-not-with-blinded-statin-therapy-in-the-anglo-scandinavian-cardiac-outcomes-trial-lipid-lowering-arm-ascot-lla-a-randomised-double-blind-placebo-controlled-trial-and-its-non-randomised-non-blind-extension-phase
#5
Ajay Gupta, David Thompson, Andrew Whitehouse, Tim Collier, Bjorn Dahlof, Neil Poulter, Rory Collins, Peter Sever
BACKGROUND: In blinded randomised controlled trials, statin therapy has been associated with few adverse events (AEs). By contrast, in observational studies, larger increases in many different AEs have been reported than in blinded trials. METHODS: In the Lipid-Lowering Arm of the Anglo-Scandinavian Cardiac Outcomes Trial, patients aged 40-79 years with hypertension, at least three other cardiovascular risk factors, and fasting total cholesterol concentrations of 6·5 mmol/L or lower, and who were not taking a statin or fibrate, had no history of myocardial infarction, and were not being treated for angina were randomly assigned to atorvastatin 10 mg daily or matching placebo in a randomised double-blind placebo-controlled phase...
May 2, 2017: Lancet
https://www.readbyqxmd.com/read/28471874/effects-of-acute-psychological-stress-on-placebo-and-nocebo-responses-in-a-clinically-relevant-model-of-visceroception
#6
Till Roderigo, Sven Benson, Margarita Schöls, Madeleine Hetkamp, Manfred Schedlowski, Paul Enck, Sigrid Elsenbruch
There is evidence to suggest a role of emotions in placebo and nocebo effects, but whether acute psychological stress changes the magnitude of placebo or nocebo responses has not been tested. In a clinically relevant model of visceroception, we assessed effects of acute psychological stress on changes in urgency and pain in response to positive or negative verbal suggestions. In 120 healthy volunteers, perceived urge-to-defecate and pain in response to individually calibrated rectal distensions were measured with visual analogue scales (VAS) during a BASELINE...
April 27, 2017: Pain
https://www.readbyqxmd.com/read/28419027/athletes-intending-to-use-sports-supplements-are-more-likely-to-respond-to-a-placebo
#7
Philip Hurst, Abby Foad, Damian Coleman, Chris Beedie
PURPOSE: We investigated associations between athletes' use of sport supplements and their responsiveness to placebo and nocebo interventions. METHODS: Participants (n=627) reported their intention to use, and actual use of, sport supplements. They then completed a 5x20m repeat sprint protocol in the baseline condition, prior to being randomized to one of three treatments. Participants in the positive-belief treatment were administered an inert capsule described as a potent supplement which would improve sprint performance...
April 18, 2017: Medicine and Science in Sports and Exercise
https://www.readbyqxmd.com/read/28371755/are-media-reports-able-to-cause-somatic-symptoms-attributed-to-wifi-radiation-an-experimental-test-of-the-negative-expectation-hypothesis
#8
Anne-Kathrin Bräscher, Koen Raymaekers, Omer Van den Bergh, Michael Witthöft
People suffering from idiopathic environmental intolerance attributed to electromagnetic fields (IEI-EMF) experience numerous non-specific symptoms that they attribute to EMF. The cause of this condition remains vague and evidence shows that psychological rather than bioelectromagnetic mechanisms are at work. We hypothesized a role of media reports in the etiology of IEI-EMF and investigated how somatosensory perception is affected. 65 healthy participants were instructed that EMF exposure can lead to enhanced somatosensory perception...
March 31, 2017: Environmental Research
https://www.readbyqxmd.com/read/28363152/placebo-and-nocebo-reactions-in-randomized-trials-of-pharmacological-treatments-for-persistent-depressive-disorder-a-meta-regression-analysis
#9
REVIEW
Ramona Meister, Alessa Jansen, Martin Härter, Yvonne Nestoriuc, Levente Kriston
BACKGROUND: We aimed to investigate placebo and nocebo reactions in randomized controlled trials (RCT) of pharmacological treatments for persistent depressive disorder (PDD). METHODS: We conducted a systematic electronic search and included RCTs investigating antidepressants for the treatment of PDD. Outcomes were the number of patients experiencing response and remission in placebo arms (=placebo reaction). Additional outcomes were the incidence of patients experiencing adverse events and related discontinuations in placebo arms (=nocebo reaction)...
March 9, 2017: Journal of Affective Disorders
https://www.readbyqxmd.com/read/28341522/cognitive-schemas-in-placebo-and-nocebo-responding-role-of-autobiographical-memories-and-expectations
#10
Danielle J P Bartels, Antoinette I M van Laarhoven, Naomi Heijmans, Dirk Hermans, Elise Debeer, Peter C M van de Kerkhof, Andrea W M Evers
PURPOSE: Placebo effects are presumed to be based on one's expectations and previous experience with regard to a specific treatment. The purpose of this study was to investigate the role of the specificity and valence of memories and expectations with regard to itch in experimentally induced placebo and nocebo itch responses. It was expected that cognitive schemas with more general and more negative memories and expectations with regard to itch contribute to less placebo itch responding...
March 21, 2017: Clinical Therapeutics
https://www.readbyqxmd.com/read/28321201/placebo-and-nocebo-effects-the-advantage-of-measuring-expectations-and-psychological-factors
#11
Nicole Corsi, Luana Colloca
Several studies have explored the predictability of placebo and nocebo individual responses by investigating personality factors and expectations of pain decreases and increases. Psychological factors such as optimism, suggestibility, empathy and neuroticism have been linked to placebo effects, while pessimism, anxiety and catastrophizing have been associated to nocebo effects. We aimed to investigate the interplay between psychological factors, expectations of low and high pain and placebo hypoalgesia and nocebo hyperalgesia...
2017: Frontiers in Psychology
https://www.readbyqxmd.com/read/28289539/contextually-aided-recovery-care-a-scientific-theory-for-innate-healing
#12
Dave Newell, Lise R Lothe, Timothy J L Raven
BACKGROUND: The chiropractic profession emerged when scientific explanations for causes of health and disease were still in infancy and the co-existence of notions such as innate healing and vitalism were perhaps admissible within such a historical context. Notwithstanding, within the scientific culture of the 21(st) Century all healthcare paradigms require evidential support which in regard these early concepts are in large part, absent. Nevertheless, a large body of emerging scientific evidence supports the existence of innate healing phenomena that may explain a plethora of clinical outcomes observed during chiropractic care...
2017: Chiropractic & Manual Therapies
https://www.readbyqxmd.com/read/28277699/harnessing-the-placebo-effect-exploring-the-influence-of-physician-characteristics-on-placebo-response
#13
Lauren C Howe, J Parker Goyer, Alia J Crum
OBJECTIVE: Research on placebo/nocebo effects suggests that expectations can influence treatment outcomes, but placebo/nocebo effects are not always evident. This research demonstrates that a provider's social behavior moderates the effect of expectations on physiological outcomes. METHODS: After inducing an allergic reaction in participants through a histamine skin prick test, a health care provider administered a cream with no active ingredients and set either positive expectations (cream will reduce reaction) or negative expectations (cream will increase reaction)...
March 9, 2017: Health Psychology: Official Journal of the Division of Health Psychology, American Psychological Association
https://www.readbyqxmd.com/read/28258765/current-insights-in-the-placebo-and-nocebo-phenomena
#14
EDITORIAL
Seetal Dodd
No abstract text is available yet for this article.
February 28, 2017: Clinical Therapeutics
https://www.readbyqxmd.com/read/28246492/the-effects-of-distraction-on-symptoms-during-drug-provocation-test
#15
Songul Cildag, Taskin Senturk, Gokhan Sargin
BACKGROUND: Some patients may have psychosomatic complaints due to their previous experiences during the drug hypersensitivity reaction. Worry about being hurt due to an administered drug is termed nocebo effect, which is the opposite of the placebo effect. In our study, we investigated the effect of distraction on symptoms during drug provocation test. METHODS: Our study included 112 patients who underwent DPTs for alternative purposes in our clinic. Previous hypersensitivity reactions of all the patients had objective signs...
2017: Clujul Medical (1957)
https://www.readbyqxmd.com/read/28244667/non-coeliac-gluten-sensitivity
#16
REVIEW
Peter R Gibson, Gry I Skodje, Knut E A Lundin
Irritable bowel syndrome-like symptoms in response to wheat ingestion is common and well described, but whether the reaction is due to gluten (i.e., non-coeliac gluten sensitivity), other wheat proteins, or FODMAPs (mostly fructans) alone or in combinations has not been clearly defined. Exclusion of coeliac disease in the presence of negative serology, and normal villous architecture but increased density of intraepithelial lymphocytes on duodenal biopsies, is difficult. Furthermore, the confidence by which a positive diagnosis is made or non-coeliac gluten sensitivity is excluded by blinded placebo-controlled rechallenge with wheat protein is reduced by strong nocebo responses generally found in patients with self-reported non-coeliac gluten sensitivity...
March 2017: Journal of Gastroenterology and Hepatology
https://www.readbyqxmd.com/read/28237673/the-placebo-and-nocebo-phenomena-their-clinical-management-and-impact-on-treatment-outcomes
#17
REVIEW
Victor Chavarria, João Vian, Círia Pereira, João Data-Franco, Brisa S Fernandes, Michael Berk, Seetal Dodd
PURPOSE: This overview focuses on placebo and nocebo effects in clinical trials and routine care. Our goal was to propose strategies to improve outcomes in clinical practice, maximizing placebo effects and reducing nocebo effects, as well as managing these phenomena in clinical trials. METHODS: A narrative literature search of PubMed was conducted (January 1980-September 2016). Systematic reviews, randomized controlled trials, observational studies, and case series that had an emphasis on placebo or nocebo effects in clinical practice were included in the qualitative synthesis...
February 22, 2017: Clinical Therapeutics
https://www.readbyqxmd.com/read/28210930/emotion-specific-nocebo-effects-an-fmri-study
#18
Anne Schienle, Carina Höfler, Sonja Übel, Albert Wabnegger
The neurobiological mechanisms of nocebos are still poorly understood. Thirty-eight women participated in a 'smell study' using functional magnetic resonance imaging. They were presented with an odorless stimulus (distilled water) together with the verbal suggestion that this fluid has an aversive odor which enhances disgust feelings. The nocebo was presented while the participants viewed disgusting, fear-inducing, and neutral images. Participants' affective and neuronal responses during nocebo administration were compared with those in a control condition without nocebo...
February 16, 2017: Brain Imaging and Behavior
https://www.readbyqxmd.com/read/28197000/impact-of-an-educational-module-in-antidepressant-naive-patients-prescribed-antidepressants-for-depression-pilot-proof-of-concept-randomized-controlled-trial
#19
Annie P John, Nagendra Madan Singh, Nagarajaiah, Chittaranjan Andrade
BACKGROUND: Patients are educated about their illness and its treatment at the time of diagnosis. However, little is known about how much of this education is retained and how it influences knowledge about, attitudes toward, and experiences with medication in antidepressant-naive patients with depression. METHODS: Antidepressant-naive outpatients with International Classification of Diseases-10 dysthymia or mild to moderate depression, who were advised antidepressant monotherapy, were randomized to control (n = 22) or intervention (n = 17) groups...
October 2016: Indian Journal of Psychiatry
https://www.readbyqxmd.com/read/28177183/learning-by-experience-visceral-pain-related-neural-and-behavioral-responses-in-a-classical-conditioning-paradigm
#20
A Icenhour, F Labrenz, C Ritter, N Theysohn, M Forsting, U Bingel, S Elsenbruch
BACKGROUND: Studies investigating mechanisms underlying nocebo responses in pain have mainly focused on negative expectations induced by verbal suggestions. Herein, we addressed neural and behavioral correlates of nocebo responses induced by classical conditioning in a visceral pain model. METHODS: In two independent studies, a total of 40 healthy volunteers underwent classical conditioning, consisting of repeated pairings of one visual cue (CS(High) ) with rectal distensions of high intensity, while a second cue (CS(Low) ) was always followed by low-intensity distensions...
June 2017: Neurogastroenterology and Motility: the Official Journal of the European Gastrointestinal Motility Society
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