Evaluation of intra- and interobserver reliability in the assessment of the ‘critical trochanter angle’
Abstract Background The recently described ‘critical trochanter angle’ (CTA) is a novel parameter in the preoperative risk assessment of stem malalignment in total hip arthroplasty. As its reproducibility needs to be evaluated, the given study aims to investigate intra- and interobserver reliability...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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BMC
2020-12-01
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| Series: | European Journal of Medical Research |
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| Online Access: | https://doi.org/10.1186/s40001-020-00469-4 |
| _version_ | 1818329650335580160 |
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| author | Sebastian Serong Moritz Schutzbach Ivica Zovko Marcus Jäger Stefan Landgraeber Marcel Haversath |
| author_facet | Sebastian Serong Moritz Schutzbach Ivica Zovko Marcus Jäger Stefan Landgraeber Marcel Haversath |
| author_sort | Sebastian Serong |
| collection | DOAJ |
| description | Abstract Background The recently described ‘critical trochanter angle’ (CTA) is a novel parameter in the preoperative risk assessment of stem malalignment in total hip arthroplasty. As its reproducibility needs to be evaluated, the given study aims to investigate intra- and interobserver reliability. It is hypothesized that both analyses justify the clinical use of the CTA. Methods A total of 100 pelvic radiographs obtained prior to total hip arthroplasty were retrospectively reviewed by four observers with different levels of clinical experience. The CTA was measured twice by each observer at different occasions in the previously described technique. Intra- and interobserver reliability was evaluated using intraclass correlation coefficients (ICC) with confidence intervals (CI) and the Bland–Altman approach. Results The mean CTA in both measuring sequences was 20.58° and 20.78°. The observers’ means ranged from 17.76° to 25.23°. Intraobserver reliability showed a mean difference of less than 0.5° for all four observers (95% limit of agreement: − 7.70–6.70). Intraobserver ICCs ranged from 0.92 to 0.99 (CI 0.88–0.99). For interobserver variation analysis, ICCs of 0.83 (CI 0.67–0.90) and 0.85 (CI 0.68–0.92) were calculated. Conclusion Analyses concerning intra- and interobserver reliability in the assessment of the CTA showed ‘very good’ and ‘good’ results, respectively. In view of these findings, the use of the CTA as an additional preoperative parameter to assess the risk of intraoperative stem malalignment seems to be justified. |
| first_indexed | 2024-12-13T12:51:26Z |
| format | Article |
| id | doaj.art-71e5510151a74e04a14c9f4c773ebd41 |
| institution | Directory Open Access Journal |
| issn | 2047-783X |
| language | English |
| last_indexed | 2024-12-13T12:51:26Z |
| publishDate | 2020-12-01 |
| publisher | BMC |
| record_format | Article |
| series | European Journal of Medical Research |
| spelling | doaj.art-71e5510151a74e04a14c9f4c773ebd412022-12-21T23:45:19ZengBMCEuropean Journal of Medical Research2047-783X2020-12-012511610.1186/s40001-020-00469-4Evaluation of intra- and interobserver reliability in the assessment of the ‘critical trochanter angle’Sebastian Serong0Moritz Schutzbach1Ivica Zovko2Marcus Jäger3Stefan Landgraeber4Marcel Haversath5Department of Orthopaedics & Orthopaedic Surgery, Saarland UniversityDepartment of Orthopaedics & Traumatology, University of Duisburg-EssenDepartment of Orthopaedics & Traumatology, University of Duisburg-EssenDepartment of Orthopaedics, Trauma and Reconstructive Surgery, St. Marien Hospital Mülheim/Chair of Orthopaedics and Trauma Surgery, University of Duisburg-EssenDepartment of Orthopaedics & Orthopaedic Surgery, Saarland UniversityDepartment of Orthopaedics & Traumatology, University of Duisburg-EssenAbstract Background The recently described ‘critical trochanter angle’ (CTA) is a novel parameter in the preoperative risk assessment of stem malalignment in total hip arthroplasty. As its reproducibility needs to be evaluated, the given study aims to investigate intra- and interobserver reliability. It is hypothesized that both analyses justify the clinical use of the CTA. Methods A total of 100 pelvic radiographs obtained prior to total hip arthroplasty were retrospectively reviewed by four observers with different levels of clinical experience. The CTA was measured twice by each observer at different occasions in the previously described technique. Intra- and interobserver reliability was evaluated using intraclass correlation coefficients (ICC) with confidence intervals (CI) and the Bland–Altman approach. Results The mean CTA in both measuring sequences was 20.58° and 20.78°. The observers’ means ranged from 17.76° to 25.23°. Intraobserver reliability showed a mean difference of less than 0.5° for all four observers (95% limit of agreement: − 7.70–6.70). Intraobserver ICCs ranged from 0.92 to 0.99 (CI 0.88–0.99). For interobserver variation analysis, ICCs of 0.83 (CI 0.67–0.90) and 0.85 (CI 0.68–0.92) were calculated. Conclusion Analyses concerning intra- and interobserver reliability in the assessment of the CTA showed ‘very good’ and ‘good’ results, respectively. In view of these findings, the use of the CTA as an additional preoperative parameter to assess the risk of intraoperative stem malalignment seems to be justified.https://doi.org/10.1186/s40001-020-00469-4Critical trochanter angleTotal hip arthroplastyStem alignmentIntraobserverInterobserverReliability |
| spellingShingle | Sebastian Serong Moritz Schutzbach Ivica Zovko Marcus Jäger Stefan Landgraeber Marcel Haversath Evaluation of intra- and interobserver reliability in the assessment of the ‘critical trochanter angle’ European Journal of Medical Research Critical trochanter angle Total hip arthroplasty Stem alignment Intraobserver Interobserver Reliability |
| title | Evaluation of intra- and interobserver reliability in the assessment of the ‘critical trochanter angle’ |
| title_full | Evaluation of intra- and interobserver reliability in the assessment of the ‘critical trochanter angle’ |
| title_fullStr | Evaluation of intra- and interobserver reliability in the assessment of the ‘critical trochanter angle’ |
| title_full_unstemmed | Evaluation of intra- and interobserver reliability in the assessment of the ‘critical trochanter angle’ |
| title_short | Evaluation of intra- and interobserver reliability in the assessment of the ‘critical trochanter angle’ |
| title_sort | evaluation of intra and interobserver reliability in the assessment of the critical trochanter angle |
| topic | Critical trochanter angle Total hip arthroplasty Stem alignment Intraobserver Interobserver Reliability |
| url | https://doi.org/10.1186/s40001-020-00469-4 |
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