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01 October 2007

A new scheme for grading the quality of scientific reports that evaluate imaging modalities for cerebrovascular diseases

Adnan I Qureshi

Med Sci Monit 2007; 13(10): RA181-187 :: ID: 502439

Abstract

Imaging of head and neck vasculature continues to improve with the application of new technology. To judge the value of new technologies reported in the literature, it is imperative to develop objective standards optimized against bias and favoring statistical power and clinical relevance.
A review of the existing literature identified the following items as lending scientific value to a report on imaging technology: prospective design, comparison with an accepted modality, unbiased patient selection, standardized image acquisition, blinded interpretation, and measurement of reliability. These were incorporated into a new grading scheme. Two physicians tested the new scheme and an established scheme to grade reports published in the medical literature. Inter-observer reliability for both methods was calculated using the kappa coefficient.
A total of 22 reports evaluating imaging modalities for cervical internal carotid artery stenosis were identified from a literature search and graded by both schemes. Agreement between the two physicians in grading the level of scientific evidence using the new scheme was excellent (kappa coefficient: 0.93, p

Keywords: Cerebrovascular Disorders - diagnosis, Diagnostic Imaging - standards, Observer Variation, Peer Review, Research - standards, Sample Size

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Medical Science Monitor eISSN: 1643-3750
Medical Science Monitor eISSN: 1643-3750