Study design: Study design randomized intra- and inter-reader reproducibility study.
Objective: To evaluate reproducibility of quantitative morphometry (QM) and agreement of dichotomous fracture/no-fracture status on lateral spinal radiographs acquired during routine clinical practice using a clinical workflow tool.
Summary of background data: Several recent guidelines have underlined the importance of Genant semi-quantitative scoring and selective QM to confirm and grade suspected vertebral fractures in clinical practice.
Methods: Thoracic and lumbar spine radiographs were acquired from 98 consecutive subjects (mean age, 60.1 ± 11.7 yr) attending the clinic for osteoporosis evaluation. For each subject, QM and Genant semi-quantitative scoring were performed on all evaluable vertebrae from L4 to T4 using a software workflow tool. A radiologist and an experienced radiographical technician performed 2 repeat reading sessions of the radiographs 12 months apart, blinded to each other's results; for the second read, the cases were anonymized and the order was randomized.
Results: Inter-reader reproducibility results were 3.1% and 3.2% coefficient of variation (%) for heights, 0.030 and 0.031 root mean square standard deviation for height ratios. For intrareader reproducibility, these values were 2.2% and 3.5% coefficient of variation %; 0.023 and 0.034 root mean square standard deviation. Kappa score results for agreement of dichotomous fracture/no-fracture status were 0.67 and 0.72 (inter-rater) and 0.50 and 0.67 (intrarater).
Conclusion: The software assessed in this study is a reliable clinical tool that facilitates QM and Genant semi-quantitative scoring of the spine in routine clinical practice.
Level of evidence: 3.