Abstract
Current evidence supports the efficacy of placebo analgesia and illustrates that patients
may be open to placebo use despite uncertainty regarding its mechanisms. Debate persists,
however, concerning the ethics of placebo treatments. The purpose of the present web-based
study was to expand upon the empirical literature on placebo analgesia ethics and
acceptability. Participants (n = 100) provided their definition of a placebo and responded
to 24 questions addressing placebo analgesia perceived knowledge, acceptability, effectiveness,
and likelihood of placebo use among different health care providers. Results support
previous research on the effects of placebo on negative mood and health care provider
attributions, with findings illustrating that negative consequences of administration
were largely mitigated by a beneficial treatment outcome. Results showed that participants
conceptualized placebo as predominately inert and were mixed regarding interpretations
of placebo effectiveness. Though acceptability ratings were dependent on the context
of placebo administration, participants endorsing even moderate placebo acceptability
were more open to placebo interventions and reported overall more positive treatment
outcomes. Participants believed that placebos were used differentially among health
care providers. Additional studies are needed to determine if placebo education can
beneficially impact perceptions of placebo analgesia knowledge, acceptability, and
treatment effectiveness.
Perspective
This study presents an examination of analgesic placebo treatment perceived acceptability,
efficacy, and knowledge among lay individuals. Our findings highlight the importance
of assessing placebo conceptualizations and treatment perceptions in evaluating placebo
ethics—a highly relevant finding that informs the clinical use of placebo components
in managing pain.
Key words
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References
- Neuropharmacological dissection of placebo analgesia: Expectation-activated opioid systems versus conditioning-activated specific subsystems.J Neurosci. 1999; 19: 484-494
- Response variability to analgesics: A role for non-specific activation of endogenous opioids.Pain. 2001; 90: 205-215
- The opposite effects of the opiate antagonist naloxone and the cholecystokinin antagonist proglumide on placebo analgesia.Pain. 1996; 64: 535-543
- Opioid-mediated placebo responses boost pain endurance and physical performance: Is it doping in sport competitions?.J Neurosci. 2007; 27: 11934-11939
- Relationship between attitudes and evaluative space: A critical review, with emphasis on the separability of positive and negative substrates.Psychol Bull. 1994; 115: 401-423
- Patients' attitudes to the use of placebos: Results from a New Zealand survey.N Z Med J. 2009; 122: 11
- Revelation of a personal placebo response: Its effects on mood, attitudes and future placebo responding.Pain. 2007; 132: 281-288
- Overt versus covert treatment for pain, anxiety, and Parkinson's disease.Lancet Neurol. 2004; 3: 679-684
- The investigator's duty not to deceive.IRB. 1985; 7: 1-6
- Placebo interventions in practice: A questionnaire survey on the attitudes of patients and physicians.Br J Gen Pract. 2011; 61: 101-107
- Use of placebo interventions among Swiss primary care providers.BMC Health Servi Res. 2009; 9: 144
- Frequency and circumstances of placebo use in clinical practice - a systematic review of empirical studies.BMC Med. 2010; 8: 15
- Biological, clinical, and ethical advances of placebo effects.Lancet. 2010; 375: 686-695
- Knowledge and use of placebos by house officers and nurses.Ann Intern Med. 1979; 91: 106-110
- A survey of placebo use in a general hospital.Gen Hosp Psychiatry. 1981; 3: 199-203
- National Ambulatory Medical Care Survey: 2004 summary.Adv Data. 2006; 23: 1-33
- Evidence for sex differences in the relationships of pain, mood, and disability.J Pain. 2006; 7: 592-601
- Is the placebo powerless? Update of a systematic review with 52 new randomized trials comparing placebo with no treatment.J Intern Med. 2004; 256: 91-100
- Placebo interventions for all clinical conditions. Cochrane Database of Systematic Reviews.John Wiley & Sons, Ltd, Chichester, UK2010
- The use of placebo interventions in medical practice–a national questionnaire survey of Danish clinicians.Eval Health Prof. 2003; 26: 153-165
- Reframing placebo in research and practice.Philos Trans R Soc B Biol Sci. 2011; 366: 1896-1904
- Powerful placebo: The dark side of the randomised controlled trial.Lancet. 1998; 351: 1722-1725
- Placebos without deception: A randomized controlled trial in irritable bowel syndrome.PLoS ONE. 2010; 5: e15591
- Factors affecting placebo acceptability: Deception, outcome, and disease severity.J Pain. 2011; 12: 920-928
- The measurement of observer agreement for categorical data.Biometrics. 1977; 33: 159-174
- Analgesic responses to morphine and placebo in individuals with postoperative pain.Pain. 1981; 10: 379-389
- The attitudes of patients and physicians towards placebo treatment–a comparative study.Soc Sci Med. 1993; 36: 767-774
- Widespread use of pure and impure placebo interventions by GPs in Germany.Fam Pract. 2011; 29: 79-85
- The legitimacy of placebo treatments in clinical practice: Evidence and ethics.Am J Bioeth. 2009; 9: 39-47
- Deception in research on the placebo effect.PLoS Medicine. 2005; 2: 853-858
- The top-down influence of ergogenic placebos on muscle work and fatigue.Eur J Neurosci. 2008; 28: 379-388
- Placebo analgesia is accompanied by large reductions in pain-related brain activity in irritable bowel syndrome patients.Pain. 2007; 127: 63-72
- A comprehensive review of the placebo effect: Recent advances and current thoughts.Annu Rev Psychol. 2008; 59: 2.1-2.26
- The role of emotion in pain.Guilford Press, New York, NY1999 (pp 74–88)
- The effects of range restriction on estimates of criterion interrater reliability: Implications for validation research.Personnel Psychol. 2002; 55: 807-825
- APS position statement on the use of placebos in pain management.J Pain. 2005; 6: 215-217
- Prescribing placebo treatments: Results of national survey of US internists and rheumatologists.BMJ. 2008; : 337
- Factors contributing to large analgesic effects in placebo mechanism studies conducted between 2002 and 2007.Pain. 2009; 145: 36-44
- A comparison of placebo effects in clinical analgesic trials versus studies of placebo analgesia.Pain. 2002; 99: 443-452
- The contributions of suggestion, desire, and expectation to placebo effects in irritable bowel syndrome patients: An empirical investigation.Pain. 2003; 105: 17-25
- Increased placebo analgesia over time in irritable bowel syndrome (IBS) patients is associated with desire and expectation but not endogenous opioid mechanisms.Pain. 2005; 115: 338-347
- Measurement and mismeasurement of mood: Recurrent and emergent issues.J Pers Assess. 1997; 68: 267-296
- Toward a consensual structure of mood.Psychol Bull. 1985; 98: 219-235
Article info
Publication history
Published online: August 02, 2012
Accepted:
June 13,
2012
Received in revised form:
June 7,
2012
Received:
April 12,
2012
Footnotes
This manuscript was supported by Grant 5R01AT001424-06 to (M.R.) from the National Center for Complementary and Alternative Medicine (NCCAM) of the NIH.
The authors have no conflict of interests to declare.
Identification
Copyright
© 2012 American Pain Society. Published by Elsevier Inc. All rights reserved.