The Validity and Absolute Reliability of Lower Extremity Angle Values on Full-Leg Standing Radiographs Using the TraumaMeter Software
Source abstract
Abstract
To establish classifications and to obtain pre- and post-operative information on patient-specific alignments, it is necessary to measure different angular values accurately and precisely, mainly on weight-bearing, full-length anteroposterior X-rays of the lower limbs (LLRs). This study evaluated angular measurements’ validity and absolute reliability on LLRs with a self-developed, computer-aided measurement system (TraumaMeter v.873). Eight independent observers measured the preoperative mechanical hip-knee-ankle (mHKA) angle of 52 lower extremities (26 cases) in a blinded fashion on three occasions separated by two weeks. We obtained an intra-observer mean bias error (MBE) of 0.40°, a standard deviation (SD) of 0.11°, and a 95% confidence interval (CI) of 0.37°–0.43°. We also obtained an inter-observer MBE of 0.49°, an SD of 0.15°, and a 95% C of 0.45°–0.53°. The intra-observer MBE for the measurement pair between the second and the first measurement round (T2T1) was 0.43°, the SD was 0.13°, and the 95% CI was 0.39°–0.47°; the MBE between the third and the second round (T3T2) was 0.37°, with an SD of 0.10° and a 95% CI of 0.34°–0.40°; and the MBE between the third and the first round (T3T1) was 0.40°, with an SD of 0.10° and a 95% CI of 0.37°–0.43°. The interobserver MBE for the first round of measurements was 0.52°, with an SD of 0.16° and a 95% CI of 0.48°–0.56°; the MBE for the second round was 0.50°, with an SD of 0.15° and a 95% CI of 0.46°–0.54°; and the MBE for the third round was 0.46°, with an SD of 0.14° and a 95% CI of 0.42°–0.50°. There were no statistically significant differences in the inter-observer errors for the three tests. In the case of the intra-observer analysis, there were differences between T2T1 and between T3T2, but these differences were minimal, with no overlaps in the lower or upper values, respectively, of the confidence intervals. These results led us to conclude that the TraumaMeter v.873 software extension for measuring lower-limb angles in LLRs is an accurate tool with low intra- and inter-observer variability.
Source: crossref · Quality: baseline
Research context
OpenAlex topics: Total Knee Arthroplasty Outcomes · Shoulder Injury and Treatment · Orthopaedic implants and arthroplasty
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Department of Orthopaedic Surgery and Traumatology, Hospital General Universitario Reina Sofía, Avda. Intendente Jorge Palacios, 1, 30003 Murcia, Spain
Instituto de Cirugía Avanzada de la Rodilla (ICAR), C. Barítono Marcos Redondo 1, 30005 Murcia, Spain
Sports & Musculoskeletal System Research Group (RAQUIS), University of Murcia, Avda. Buenavista 32, El Palmar, 30120 Murcia, Spain
Department of Orthopaedic Surgery and Traumatology, Hospital Clínico Universitario Virgen de la Arrixaca, Ctra. Madrid-Cartagena, s/n, El Palmar, 30120 Murcia, Spain
Department of Orthopaedic Surgery and Traumatology, IMED Hospitales, C. Max Planck, 3, 03203 Elche, Spain
Department of Dermatology, Hospital General Universitario Santa María del Rosell, Paseo Alfonso XIII, 61, 30203 Cartagena, Spain
Department of Orthopedic Surgery and Traumatology, L’Hôpital Riviera-Chablais, Route du Vieux-Séquoia 20, 1847 Rennaz, Switzerland
Department of Orthopaedic Surgery and Traumatology, Hospital Universitario Torrecárdenas, C. Hermandad de Donantes de Sangre, s/n, 04009 Almería, Spain
Área de Salud IX (Vega Alta del Segura), Ctra. de Abarán s/n, Cieza, 30530 Murcia, Spain
Emergency Department, Hospital HLA La Vega, C/Román Alberca s/n, 30008 Murcia, Spain
Department of Physiotherapy, Faculty of Medicine, University of Murcia, Avda. Buenavista 32, El Palmar, 30120 Murcia, Spain
Department of Orthopaedic Surgery and Traumatology, Morales Meseguer University General Hospital, Avda. Marqués de los Velez s/n, 30008 Murcia, Spain
Department of Surgery, Paediatrics and Obstetrics & Gynaecology, Faculty of Medicine, Avda. Buenavista 32, El Palmar, 30120 Murcia, Spain
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