Bias (Epidemiology) - Research News and Information

Thursday, January 08, 2009

The accuracy of symptoms, signs and diagnostic tests in the diagnosis of left ventricular dysfunction in primary care: a diagnostic accuracy systematic review.

6 Oct 2008 BACKGROUND: To assess the accuracy of findings from the clinical history, symptoms, signs and diagnostic tests (ECG, CXR and natriuretic peptides) in relation to the diagnosis of left ventricular systolic dysfunction (LVSD) in a primary care ... Read more...

Removal of AU bias from microarray mRNA expression data enhances computational identification of active microRNAs.

Oct 2008 Elucidation of regulatory roles played by microRNAs (miRs) in various biological networks is one of the greatest challenges of present molecular and computational biology. The integrated analysis of gene expression data and 3'-UTR sequences holds ... Read more...

"Distorted into clarity": a methodological case study illustrating the paradox of systematic review.

29 Sep 2008 Systematic review is typically viewed in the health sciences as the most objective--that is, rigorous, transparent, and reproducible--method for summarizing the results of research. Yet, recent scholarship has shown systematic review to involve ... Read more...

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Latest indexed articles for 'Bias (Epidemiology)'

These are the very latest articles for this heading:

• Issues behind disclosure of conflicts of interest. 10 Nov 2008
• Spectrum bias: why generalists and specialists don't connect. 30 Oct 2008
• The accuracy of symptoms, signs and diagnostic tests in the diagnosis of left ventricular dysfunction in primary care: a diagnostic accuracy systematic review. 6 Oct 2008
• Does analysis using "last observation carried forward" introduce bias in dementia research? 5 Oct 2008
• Genetics and genomics: gene expression microarrays. 5 Oct 2008
• Did prescription bias affect outcomes in a study of the relative effectiveness of osteoporosis drugs? 5 Oct 2008
• Removal of AU bias from microarray mRNA expression data enhances computational identification of active microRNAs. Oct 2008
• "Distorted into clarity": a methodological case study illustrating the paradox of systematic review. 29 Sep 2008
• Manufactured populations: what do contemporary reference skeletal collections represent? A comparative study using the Maxwell Museum documented collection. 29 Sep 2008
• Progression-related bias in the monitoring of kidney function in patients with diabetes and chronic kidney disease. 29 Sep 2008
• Improving accuracy in detecting acoustic onsets. 29 Sep 2008
• The perplexities of conducting randomized, double-blind, placebo-controlled treatment trials in anorexia nervosa patients. 29 Sep 2008
• Effectiveness of adjunctive STEPPS group treatment in borderline personality disorder patients. 29 Sep 2008
• Commentary: Flawed study designs are not salvaged by large samples. 29 Sep 2008
• Spectrum bias: why generalists and specialists do not connect. 29 Sep 2008
• Disclosure. 29 Sep 2008
• Vive la difference! On potential sex differences in response to thrombolysis. 28 Sep 2008
• Higher criticism thresholding: Optimal feature selection when useful features are rare and weak. 22 Sep 2008
• Publication of clinical trials supporting successful new drug applications: a literature analysis. 21 Sep 2008
• Missing patient-reported outcome data in an adjuvant lung cancer study. 20 Sep 2008

See a longer list of these articles.

Technical information about 'Bias (Epidemiology)'

Definition: Any deviation of results or inferences from the truth, or processes leading to such deviation. Bias can result from several sources: one-sided or systematic variations in measurement from the true value (systematic error); flaws in study design; deviation of inferences, interpretations, or analyses based on flawed data or data collection; etc. There is no sense of prejudice or subjectivity implied in the assessment of bias under these conditions.

Descriptor UI: D015982

Alternative terms: Bias (Epidemiology); Biases, Epidemiologic; Epidemiologic Biases; Bias, Epidemiologic; Biases; Bias; Truncation Biases; Biases, Truncation; Truncation Bias; Bias, Truncation; Ecological Bias; Ecological Biases; Bias, Ecological; Fallacy, Ecological; Ecological Fallacies; Ecological Fallacy; Fallacies, Ecological; Biases, Ecological; Outcome Measurement Errors; Error, Outcome Measurement; Errors, Outcome Measurement; Outcome Measurement Error; Systematic Bias; Bias, Systematic; Bias, Aggregation; Aggregation Bias; Biases, Statistical; Statistical Biases; Bias, Statistical; Statistical Bias;

Tree Number: N05.715.350.150; N06.850.490.500;

Online Note: use RESEARCH to search BIAS (EPIDEMIOLOGY) 1987-89

History Note: 90; was BIAS see RESEARCH 1987-89

Technical Notes: do not use for "bias" as prejudice or subjectivity ( = PREJUDICE); IM GEN only; coord NIM with disease /epidemiol (IM), not /etiol; specify geog if pertinent; DF: BIAS