Navigation Links
Avoiding bias in medical research

Most people are rather vague when reporting on food and drink consumption, smoking and exercise habits. General practitioners, however, are skilled at interpreting phrases such as "I only have a few drinks rarely...each week" and "I get to the gym regularly" and can estimate based on symptoms and a person's physical appearance just how precise those claims are. However, it is crucial for healthcare research and epidemiology that relies on patient self-reporting that we find a more objective, rather than intuitive, way to identify bias in self-reporting.

A new statistical approach to address the problem of bias in self-reporting has been developed by a team at Washington State University in Pullman. The technique, reported in a forthcoming issue of the International Journal of Behavioural and Healthcare Research, is based on stochastic frontier estimation (SFE). SFE is more commonly used in economics and market research to spot statistical errors and unanticipated deviations from the norms in data. The approach helps highlight when the subjects of medical research may either deliberately or inadvertently bias the information they provide to researchers.

"There are many reasons individuals might offer biased estimates of self-assessed behavior, ranging from a misunderstanding of what a proper measurement is to social-desirability bias, where the respondent wants to 'look good' in the survey, even if the survey is anonymous," explains Robert Rosenman, , who coauthored the study with Laura Hill and Vidhura Tennekoon. "Response bias itself can be problematic in program evaluation and research, but is especially troublesome when it causes a recalibration of bias after an intervention," he adds.

SFE can identify bias at specific times in self-reported data and in particular identify bias after a healthcare intervention so that researchers can determine whether or not self-reporting patients have biased their responses because they presume the intervention should have caused changes. This characteristic of the technique could ensure that double-blind placebo-controlled trials are more robust in terms of the validity of data. It could help improve results obtained before and after an experimental treatment is given to one group and the placebo to another when neither party, patient or researcher, is aware in advance of which group a patient is in.

Using data involving family dynamics and interventions to help strengthen family bonds, the team has demonstrated the statistical aspects of the SFE approach. "SFE allows the researcher to identify bias and causal factors at the individual level, it expands our ability to identify, understand, explain, and potentially correct for, response shift bias," Rosenman explains.


Contact: Robert Rosenman
Inderscience Publishers

Related medicine news :

1. Avoiding Dairy Due to Lactose Intolerance is Unnecessary in Most Cases and May Pose Diet and Health Risks, Concludes National Institutes of Health Consensus Development Conference Panel
2. Avoiding Child Obesity: Children Eat Vegetables with Author of New Picture Book, A Hungry Lion in My Tummy
3. iCycleBeads: New iPhone application for planning and avoiding pregnancy
4. Some Tips for Avoiding Injury on Super Bowl Sunday
5. Gift-Giving, for Many Men, Means Avoiding Rejection
6. Avoiding or controlling diabetes may reduce cancer risk and mortality
7. Launches Online Store “The Relief Shop” - What Does this Medical Supply Store Carry and How Can They Help You?
8. Medical Transcription Services and EHR Provider MxSecure Launches New Enhanced Website with Goal of Improved Physician Productivity
9. Medical Training School, Pima Medical Institute Offering First Bachelor's Degree Program
10. FDA Seeks Reduction in Radiation From Medical Scans
11. UH Case Medical Center researchers publish promising findings for advanced cervical cancer
Post Your Comments:
(Date:11/27/2015)... ... 2015 , ... MPWH, the No.1 Herpes-only dating community in the world, revealed that over 50% ... More than 3.7 billion people under the age of 50 – or 67% of the ... first global estimates of HSV-1 infection . , "The data shocks us highly!" said ...
(Date:11/27/2015)... DE (PRWEB) , ... November 27, 2015 , ... ... member of the well-respected Microsoft Dynamics SL User Group (MSDSLUG). Recognized as Microsoft’s ... an independent group of Microsoft Dynamics SL software users, partners, industry experts and ...
(Date:11/27/2015)... ... November 27, 2015 , ... The moment you stop ... not only fulfilling the needs of advisers and clients but going above and ... providing top-tier customer service. However, there's always room for improvement, which is why ...
(Date:11/27/2015)... ... ... CBD College is proud to announce that on November 20th, ... its Diagnostic Medical Sonography program. CBD College is honored to join this very short ... universities in the state of California make the cut. CBD College is officially the ...
(Date:11/27/2015)... , ... November 27, 2015 , ... Dr. Thomas ... Associates, Inc. and Dr. Tucker Bierbaum with Emergency Medicine at St., Joseph ... that both STEMI and Sepsis conditions present in similar ways and require time-critical intervention ...
Breaking Medicine News(10 mins):
(Date:11/26/2015)... 2015 Research and Markets ( ... "2016 Future Horizons and Growth Strategies in the ... Country Segment Forecasts, Competitive Intelligence, Emerging Opportunities" ... --> --> This new 247-page ... therapeutic drug monitoring market, including emerging tests, technologies, ...
(Date:11/26/2015)... 2015 --> ... potential att använda SyMRI för att hitta ... patienter med multipel skleros (MS) eller hjärntumörmetastaser ... AB för att kunna använda SyMRI Research ... SyMRI kan man generera flera konstrastbilder från ...
(Date:11/26/2015)... , November 26, 2015 ... the "Self Administration of High Viscosity Drugs" ... ) has announced the addition of the ... report to their offering. --> Research ... addition of the "Self Administration of High ...
Breaking Medicine Technology: