Kyushu University Academic Staff Educational and Research Activities Database
List of Presentations
Stephen Leonard Lyman Last modified date:2021.07.15

Lecturer / Department of Medical Education / Faculty of Medical Sciences

1. Stephen Lyman, Go Omori, Masataka Deie, Norimasa Nakamura, Toshiaki Takahashi, Harukazu Tohyama, Nosh Fukui, Hiroshi Ikeda, Takahisa Sasho, Responsiveness of the J-KOOS+ following Total Knee Arthroplasty, JOSKAS, 2020.12, Introduction: We recently created and validated the JKOOS+, a more culturally relevant knee outcomes survey for Japanese patients. This survey was developed using patients with knee osteoarthritis grades 1 to 4. However, we were unable to validate the responsiveness of the JKOOS+ to treatment due to the nature of that prior study. In this study we aimed to determine the responsiveness of the JKOOS+ to total knee arthroplasty (TKA).

Methods: We prospectively enrolled 87 patients scheduled for TKA across 7 centers in Japan. We administered the JKOOS+ and the Oxford Knee Score (OKS) to patients preoperatively and at 1 year post-operatively. We then calculated the Pearson’s correlation coefficients between the novel J-Activities of Daily Living (JADL) and Knee Flexion (KF) domains and the OKS both pre- and post-operatively. Further, we calculated the standardized response mean (SRM) as a measure of responsiveness of the domains to TKA, a known effective surgical intervention.

Results: We had no loss to follow-up. The cohort was 81% female with an average age of 74 years. On average, patients improved 18-35 points per JKOOS+ domain with the largest improvement seen in the Quality of Life Domain. Both the JADL and KF demonstrated strong correlations with the OKS (0.699-0.849). The JADL had the highest responsiveness of all JKOOS+ domains (SRM=1.61), which was identical to that of the OKS. The JADL had superior responsiveness to the JKOOS ADL (SRM=1.49). The KF was also responsive (SRM=1.11), equivalent to the responsiveness of the Pain and Symptoms domains.

Conclusions: The modified JADL and new KF domains were successfully validated in the TKA population. Both JADL and KF domains demonstrated responsiveness after TKA. The JADL again demonstrated superior properties to the original JKOOS-ADL, presumably because of its improved cultural relevant for Japanese patients.
2. Stephen Lyman, Spring Training Injuries, Baseball HQ, 2020.02.
3. Stephen Lyman, Baseball Injuries Symposium, Baseball HQ, 2020.10.
4. Stephen Lyman, Challenges in Surgical Trials, 2020.10.
5. Stephen Lyman, Should Cost be a Measure of Success? , International Cartilage Repair Society, 2019.10.
6. Stephen Lyman, Social Media to Promote Your Research, International Society of Arthroscopy, Knee Surgery and Orthopaedic Sports Medicine (ISAKOS), 2019.05.
7. Stephen Lyman PhD, Basic Statistics (in 7 minutes), International Society of Arthroscopy, Knee Surgery and Orthopaedic Sports Medicine (ISAKOS), 2019.05.
8. Stephen Lyman PhD, Danyal Nawabi MD FRCS, Alissa Burge MD, Kara Fields MS, Bryan Kelly MD, Matthew Koff PhD, Hollis Potter MD, Robert G. Marx MD MSc FRCSC , Utility of MRI to Predict Severity and Location of Pathology at Arthroscopy in FAI Patients, International Society of Arthroscopy, Knee Surgery and Orthopaedic Sports Medicine (ISAKOS), 2019.05.
9. Stephen Lyman PhD, Norimasa Nakamura MD PhD, Masataka Deie MD PhD, Naoshi Fukui MD PhD, Harukazu Tohyama MD PhD, Hiroshi Ikeda MD PhD, Takahisa Sasho MD PhD, Go Omori MD PhD , JKOOS+ Validation of a Culturally Relevant Japanese Knee Survey , Japanese Orthopaedic Society of Knee, Arthroscopy and Sports Medicine (JOSKAS), 2019.06.