Navigation Links
Avoiding bias in medical research
Date:10/17/2011

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
yamaka@wsu.edu
Inderscience Publishers
Source:Eurekalert

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. TheReliefPlace.com 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:
*Name:
*Comment:
*Email:
(Date:2/11/2016)... Little Rock, AR (PRWEB) , ... February 11, 2016 , ... ... Change in their community by announcing a new fundraiser in support of a local ... agency also hopes the campaign will bring awareness to, and rally support for, all ...
(Date:2/11/2016)... Alexandria, VA (PRWEB) , ... February 11, 2016 , ... ... of its new office in the heart of Old Town at 108 South Columbus ... individuals and businesses the highest level of medical care in the convenience of their ...
(Date:2/11/2016)... ... , ... Husted Kicking has completed its Third Annual Husted Kicking ... 7th, 2016 according to kicking coach Michael Husted. , “This event serves as an ... in Indianapolis,” says Husted. “The NFL uses a third party organization to select players ...
(Date:2/11/2016)... ... February 11, 2016 , ... Research led ... rates of several common cancer screenings, especially among women. Cancer screenings are often ... rates. , The study,“What Does Medicaid Expansion Mean for Cancer Screening and ...
(Date:2/10/2016)... ... February 10, 2016 , ... The 9th ... Molecular Imaging Congress (WMIC), will be held in New York City, NY on ... Biology…Improving Therapy.” The congress will highlight and emphasize how imaging reveals a greater ...
Breaking Medicine News(10 mins):
(Date:2/11/2016)... , Feb. 11, 2016  Proliant Biologicals is proud ... Serum Albumin (BSA) manufacturing facility.  The facility is located ... , in Feilding. Boone ... to functionally duplicate the systems in the U.S. facility, ... used for U.S. installations.  --> ...
(Date:2/11/2016)... Breast Cancer Therapeutics in Asia-Pacific Markets to 2021 ... breast cancer market will experience considerable expansion from $1.9 billion ... Annual Growth Rate (CAGR) of 8.5%. --> Breast ... that the Asia-Pacific (APAC) breast cancer ... to $3.4 billion by 2021, at a Compound Annual Growth ...
(Date:2/11/2016)... , Feb. 11, 2016  AbbVie, a ... AbbVie Rheumatology Scholarship, designed to provide financial support ... as they pursue higher education goals. Fifteen scholars ... the 2016-2017 school year. The AbbVie Rheumatology Scholarship ... Haas , vice president, corporate social responsibility, brand ...
Breaking Medicine Technology: