Nonspecific effects in longitudinal studies: impact on quality of life measures.
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Summary
The results demonstrate the importance of placebo and Hawthorne effects and suggest that they may be responsible for misleading results or reductions in the power of controlled trials.
- Type
- article
- Published
- 1996-01-01
- Cited by
- 101
- References
- 26
- OpenAlex
- https://openalex.org/W1976653996
- Semantic Scholar
- https://api.semanticscholar.org/CorpusID:8565803
Keywords
Quality (philosophy), Quality of life (healthcare), Medicine, Gerontology, Physics
References
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- The Design And Analysis Of Longitudinal Studies
- BMDP statistical software
- Clinical Epidemiology: The Essentials
- Measuring quality of life in clinical trials: a taxonomy and review.
- The importance of placebo effects in pain treatment and research.
- The qualification period.
- What Happened at Hawthorne?
- Quality of life measures in health care. I: Applications and issues in assessment.
- Methods for assessing whether change depends on initial value.
- The MOS 36‐Item Short‐Form Health Survey (SF‐36): II. Psychometric and Clinical Tests of Validity in Measuring Physical and Mental Health Constructs
- Implications of placebo theory for clinical research and practice in pain management
- Effects of Physical Therapy on Functional Status of Nursing Home Residents
- The MOS 36-ltem Short-Form Health Survey (SF-36): III. Tests of Data Quality, Scaling Assumptions, and Reliability Across Diverse Patient Groups
- Factors of importance when evaluating quality of life in clinical trials.
- Randomization by group in studying the effect of drug information in primary care.
- The MOS short-form general health survey. Reliability and validity in a patient population.
- The effect of regression to the mean in epidemiologic and clinical studies.
- Randomized, controlled trials using the Metro Firm System.
- FACTORS CONTRIBUTING TO THE PLACEBO EFFECT. THEIR IMPLICATIONS FOR PSYCHOTHERAPY.
Cited by
- Hawthorne Effect with Transient Behavioral and Biochemical Changes in a Randomized Controlled Sleep Extension Trial of Chronically Short-Sleeping Obese Adults: Implications for the Design and Interpretation of Clinical Studies
- Impact of the Hawthorne effect in a longitudinal clinical study: the case of anesthesia.
- Re: Yelland MJ, Glasziou PP, Bogduk N, et al. Prolotherapy injections, saline injections, and exercises for chronic low-back pain: a randomized study. Spine. 2003;29:9-16.
- Workstyle Intervention for the Prevention of Work-Related Upper Extremity Problems: A Randomized Controlled Trial
- The development of quality indicators for Taiwanese institutional dementia care
- Living with deteriorating and hereditary disease : experiences over ten years of persons with muscular dystrophy and their next of kin
- Selection of quality-of-life measures for a prevention trial: a psychometric analysis.
- Studies of preoperative evaluation and surgical procedures for gastroesophageal reflux disease
- CAN COMPLEMENTARY AND ALTERNATIVE MEDICINE BE EVALUATED WITHIN THE FRAMEWORK OF EVIDENCE-BASED MEDICINE?
- Development of a customized electronic reminder to facilitate powered seating function usage and compliance with clinical recommendations: Design process and clinical efficacy
- Exercise for people with inflammatory peripheral neuropathy
- Placebo treatment versus no treatment.
- Psychosocial and stress-related aspects on Ischemic Heart Disease
- The effectiveness of an oral homoeopathic preparation of selenium sulphide 12X in the management of dandruff (seborrheic dermatitis of the scalp)
- Quality of Life of Visually Impaired Working Age Adults
- [Commentary] Research assessments: instruments of bias and brief interventions of the future?
- Placebo interventions for all clinical conditions.
- Quality of Life After Treatment with Autologous Bone Marrow Derived Cells in No Option Severe Limb Ischemia.
- Outcomes of patients who participate in randomized controlled trials compared to similar patients receiving similar interventions who do not participate.
- Do young novice drivers overestimate their driving skills more than experienced drivers? Different methods lead to different conclusions.
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