Interobserver agreement in the assessment of cerebral atrophy on CT using bicaudate and sylvian-fissure ratios |
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| Authors: | M. van Zagten F. Kessels J. Boiten J. Lodder |
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| Affiliation: | (1) University Hospital Maastricht, Department of Neurology, PO Box 5800, 6202 AZ Maastricht, The Netherlands Tel.: + 43-3 87 50 62 Fax: + 43-3 87 70 55, NL;(2) Department of Epidemiology, University of Maastricht, The Netherlands, NL |
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| Abstract: | To assess the interobserver variability of cerebral-atrophy measures on CT, three investigators measured the bicaudate ratio (BCR) and the sylvian-fissure ratio (SFR) on 20 CT studies of patients with ischaemic stroke. The intraclass correlation coefficient of BCR measurements was 0.82 [95 % confidence interval (CI) 0.75–0.94], and that of SFR measurements 0.69 (95 % CI 0.57–0.89). The range of pairwise-calculated Pearson correlation coefficients was smaller for measurement of the BCR (0.89–0.92) than for the SFR measurements (0.66–0.84). Received: 2 June 1998 Accepted: 4 October 1998 |
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| Keywords: | Cerebral atrophy Computed tomography Interobserver agreement |
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