Switch to
Predicate | Object |
---|---|
rdf:type | |
lifeskim:mentions | |
pubmed:issue |
8
|
pubmed:dateCreated |
1990-9-14
|
pubmed:abstractText |
The Radiographic Vertebral Index (RVI) was assessed as a possible outcome measure for bone disease in myeloma by evaluating within and between reader reproducibility. Four readers (2 radiologists and 2 clinical hematologists) independently scored, on two separate occasions, the RVI on 40 radiographs from patients with myeloma. Each vertebra from third thoracic (T3) to fifth lumbar (L5) received a score of "1" if normal, "2" if biconcave and "4" if crushed or fractured. RVI global scores, therefore, could vary from a minimum of 15, for no damage, to a potential maximum of 60 in which all vertebrae are collapsed. Agreement was determined for each vertebra using crude percentage agreement and the kappa statistic (which corrects for chance-expected agreement) for categorical data, and for global score using analysis of variance and calculating intra-class correlation. With increasing mean abnormality score on individual vertebrae there was a corresponding increase in kappa and reduction in crude percentage agreement. Within readers, the mean percentage agreement across all vertebrae varied from 85.6 to 90.3% and the observed differences just reach statistical significance (p = 0.048). Mean kappa values ranged from 0.48 to 0.63 and were similar across readers. Differences in intra-reader agreement were not related to subspecialty. When between reader percentage agreement and kappa scores were assessed for radiologists and non-radiologist clinicians, no difference could be detected. Agreement with respect to intra-reader mean global RVI scores was excellent as illustrated by the intra-class correlation coefficient which varied from 0.89 to 0.94. The mean intra-class correlation for radiologists was 0.92, compared with 0.91 for non-radiologists.(ABSTRACT TRUNCATED AT 250 WORDS)
|
pubmed:language |
eng
|
pubmed:journal | |
pubmed:citationSubset |
IM
|
pubmed:status |
MEDLINE
|
pubmed:issn |
0895-4356
|
pubmed:author | |
pubmed:issnType |
Print
|
pubmed:volume |
43
|
pubmed:owner |
NLM
|
pubmed:authorsComplete |
Y
|
pubmed:pagination |
833-40
|
pubmed:dateRevised |
2004-11-17
|
pubmed:meshHeading |
pubmed-meshheading:2384769-Analysis of Variance,
pubmed-meshheading:2384769-Cervical Vertebrae,
pubmed-meshheading:2384769-Humans,
pubmed-meshheading:2384769-Lumbar Vertebrae,
pubmed-meshheading:2384769-Multiple Myeloma,
pubmed-meshheading:2384769-Observer Variation,
pubmed-meshheading:2384769-Reproducibility of Results,
pubmed-meshheading:2384769-Spine,
pubmed-meshheading:2384769-Thoracic Vertebrae
|
pubmed:year |
1990
|
pubmed:articleTitle |
Assessment of observer variation in measuring the Radiographic Vertebral Index in patients with multiple myeloma.
|
pubmed:affiliation |
Ontario Cancer Foundation, Hamilton Regional Centre, Hamilton Civic Hospital, Ontario, Canada.
|
pubmed:publicationType |
Journal Article
|