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Axenhus M, Magnéli M. Trend, disparities, and projection analysis of public data on foot fractures in Sweden: a retrospective analysis of 179 129 fractures. BMC Musculoskelet Disord 2024; 25:592. [PMID: 39068413 PMCID: PMC11282693 DOI: 10.1186/s12891-024-07711-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/22/2024] [Accepted: 07/19/2024] [Indexed: 07/30/2024] Open
Abstract
INTRODUCTION Orthopedic injuries to the foot constitute a significant portion of lower extremity injuries, necessitating an understanding of trends for effective preventive strategies and resource allocation. Demographic shifts, improved traffic safety, and lifelong physical activity may alter incidence rates, trauma mechanisms, and fracture distribution. This study explores the prevalence of foot fractures in Sweden using publicly available data. METHODS Utilizing data from the Swedish National Board of Health and Welfare (SNBHW) spanning 2008-2022, retrospective study focuses on foot fractures in Sweden. Analysis includes calculating annual incidence rates per 100,000 person-years, assessing temporal trends, and exploring seasonal variations. Poisson regression analysis was used for projections into 2035. RESULTS Between 2008-2022, the average annual foot fracture incidence was 11,942, with notable fluctuations influenced by the COVID-19 pandemic. Age and sex disparities impact rates, and seasonal variance highlights increased incidence in summer. By 2035, foot fractures will decreasae amongst several demographic groups. CONCLUSION This study provides insights into temporal trends, sex differences, and seasonal variations foot fracture patterns in Sweden. The identified trends suggest the utilization of targeted preventive strategies, efficient resource allocation, and informed healthcare planning. Despite limitations, this research offers valuable insights into foot fractures within the Swedish population, utilizing publicly aggregated data.
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Affiliation(s)
- Michael Axenhus
- Department of Orthopaedic Surgery, Danderyd Hospital, Stockholm, Sweden.
- Department of Clinical Sciences at Danderyd Hospital, Karolinska Institutet, Stockholm, Sweden.
| | - Martin Magnéli
- Department of Orthopaedic Surgery, Danderyd Hospital, Stockholm, Sweden
- Department of Clinical Sciences at Danderyd Hospital, Karolinska Institutet, Stockholm, Sweden
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Zhang L, Jin Z. Antibacterial activities of titanium dioxide (TiO 2) nanotube with planar titanium silver (TiAg) to prevent orthopedic implant infection. J Orthop Surg Res 2024; 19:144. [PMID: 38365803 PMCID: PMC10870603 DOI: 10.1186/s13018-024-04596-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/27/2023] [Accepted: 01/28/2024] [Indexed: 02/18/2024] Open
Abstract
BACKGROUND Orthopedic implant infection has become a common catastrophic complication after various orthopedic implants, which can lead to prolonged use of antibiotics and even surgical failure. The quality of care (QoC) of orthopedic implant infection is very important. METHODS Titanium dioxide (TiO2) nanotube array with planar TiAg was prepared, and their antibacterial rates were tested. 400 patients hospitalized in the Department of Orthopedics of Wuhan Fourth Hospital from May 2019 to May 2020 were selected as controls (before QoC evaluation system of orthopedics), and 400 patients hospitalized from June 2020 to June 2021 were selected as observation group (after QoC evaluation system of orthopedics). RESULTS Regardless of Staphylococcus aureus or Escherichia coli, the antibacterial rate of TiO2 nanotube array with planar TiAg was clearly higher than that of pure iron film on the 10th and 20th days (P < 0.05). The accuracy of hospitalization assessment, disease assessment, adverse event intervention, nursing record filing and nursing satisfaction in observation group were higher as against controls (P < 0.05). CONCLUSION The TiO2 nanotube array with planar TiAg has good antibacterial property, which can effectively prevent orthopedic implant infection. The construction of QoC evaluation system for orthopedic specialists can effectively improve the QoC of orthopedic specialists.
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Affiliation(s)
- Lihong Zhang
- Department of Surgery, Wuhan Fourth Hospital, Wuhan, 430030, Hubei Province, China
| | - Zhihui Jin
- Department of Orthopaedics, Renmin Hospital of Wuhan University, Wuhan, 430060, Hubei Province, China.
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Jeyaraman M, Ram PR, Jeyaraman N, Ramasubramanian S, Shyam A. The Era of Digital Orthopedics: A Bone or Bane? J Orthop Case Rep 2024; 14:1-4. [PMID: 38292103 PMCID: PMC10823821 DOI: 10.13107/jocr.2024.v14.i01.4125] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2023] [Revised: 11/02/2023] [Indexed: 02/01/2024] Open
Abstract
Orthopedics, the medical specialty dedicated to diagnosing, treating, and preventing disorders of the musculoskeletal system, has long been a cornerstone of healthcare. With an aging population and an increasing emphasis on maintaining an active lifestyle, the demand for orthopedic care is on the rise. However, the field of orthopedics is rapidly evolving, and one of the most significant developments in recent years is the emergence of digital orthopedics [1, 2]. This transformation is reshaping the way orthopedic care is delivered, from diagnosis and treatment to patient outcomes and beyond. In this editorial, we explore the concept of digital orthopedics, its implications, and the potential benefits it offers to both patients and health-care professionals.
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Affiliation(s)
- Madhan Jeyaraman
- Department of Orthopaedics, ACS Medical College and Hospital, Dr MGR Educational and Research Institute, Chennai, Tamil Nadu, India
| | - Pothuri Rishi Ram
- Department of Orthopaedics, Sanjay Gandhi Institute of Trauma and Orthopaedics, Bengaluru, Karnataka, India
| | - Naveen Jeyaraman
- Department of Orthopaedics, ACS Medical College and Hospital, Dr MGR Educational and Research Institute, Chennai, Tamil Nadu, India
| | - Swaminathan Ramasubramanian
- Department of Orthopaedics, Government Medical College, Omandurar Government Estate, Chennai, Tamil Nadu, India
| | - Ashok Shyam
- Department of Orthopaedics, Sancheti Institute for Orthopedics and Rehabilitation, Pune, Maharashtra, India
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Dias JM, Mendes AF, Pestana de Aguiar E, Silveira LC, Noel Dias MF, Barbosa Raposo NR. Interobserver Agreement and Satisfaction With the use of Telemedicine for Evaluating low Back Pain: A Primary, Observational, Cross-Sectional, Analytical Study. Global Spine J 2023:21925682231194453. [PMID: 37585445 DOI: 10.1177/21925682231194453] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 08/18/2023] Open
Abstract
STUDY DESIGN A primary, observational, cross-sectional, analytical study. OBJECTIVE The development of a framework for systematic telemedicine (TM) for orthopedic physicians in frequent clinical care may increase agreement in diagnosis and satisfaction among users of TM. Therefore, this study aimed to estimate the agreement in the diagnosis of low back pain (LBP) between TM, systematized by a self-completed digital questionnaire, and face-to-face (FF) care in patients with LBP. METHODS This study included adults up to 75 years of age with LBP for more than 6 weeks. They were evaluated at 2 independent time points (TM and FF) by different orthopedists with 3 different levels of expertise. Professionals evaluated the sample without prior knowledge of the diagnosis, and each orthopedist provided a diagnosis. Diagnostic agreement was the primary outcome. Secondary outcomes were the duration of the visit and satisfaction among healthcare professionals. RESULTS A total of 168 participants were eligible, of whom 126 sought care through TM and 122 sought FF care (mean age, 47 years [range, 18-75 years]; 66.4% women). The agreement among professionals regarding the diagnosis was moderate (kappa = .585, P = .001). TM was faster than FF (11.9 minutes (standard deviation = 4.1) vs 18.6 (SD = 6.9), P < .001). Professional satisfaction was higher among spine specialists than among orthopedic residents and orthopedists who were not specialists in spine surgery. CONCLUSION Agreement in diagnosis was moderate for TM, with a 30% shorter visit duration than FF. Satisfaction varied by professional expertise and was higher among spine specialists than among professionals with other expertise.
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Affiliation(s)
- Jair Moreira Dias
- Center for Research and Innovation in Health Sciences (NUPICS), School of Pharmacy, Federal University of Juiz de Fora, Juiz de Fora, Brazil
- Department of Orthopedics and Traumatology, University Hospital, Federal University of Juiz de Fora, Juiz de Fora, Brazil
| | - Adriano Fernando Mendes
- Department of Orthopedics and Traumatology, University Hospital, Federal University of Juiz de Fora, Juiz de Fora, Brazil
- Department of Surgery, School of Medicine, Federal University of Juiz de Fora, Juiz de Fora, Brazil
| | - Eduardo Pestana de Aguiar
- Department of Industrial and Mechanical Engineering, Federal University of Juiz de Fora, Juiz de Fora, Brazil
| | - Luan Costa Silveira
- Department of Industrial and Mechanical Engineering, Federal University of Juiz de Fora, Juiz de Fora, Brazil
| | | | - Nádia Rezende Barbosa Raposo
- Center for Research and Innovation in Health Sciences (NUPICS), School of Pharmacy, Federal University of Juiz de Fora, Juiz de Fora, Brazil
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Vicenti G, Bizzoca D, Pesare E, Grasso M, Ginestra W, Moretti B. Second and Third Pandemic Waves in Apulia: How COVID-19 Affected Orthopedic and Trauma Care-A Single-Center Study. J Clin Med 2022; 11:6526. [PMID: 36362754 PMCID: PMC9654803 DOI: 10.3390/jcm11216526] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2022] [Revised: 09/24/2022] [Accepted: 10/31/2022] [Indexed: 07/30/2023] Open
Abstract
PURPOSE In orthopedics and traumatology, as a direct consequence of the COVID-19 first wave, there was a massive reorganization and a stop to all elective activities, which were postponed. In this study, we aimed to analyze the impact of the COVID-19 pandemic on orthopedic surgery in Apulia during the second wave, from March to June 2021 (when Apulia was under social distancing restrictions), and during the third wave, from September to December 2021 (when Apulia was under no restrictions). We compared these months to the same periods in 2019 for an evaluation of the surgical decrease during the pandemic period. METHODS We performed a retrospective analysis of major orthopedic procedures, day-surgery procedures and urgent procedures (trauma and non-traumatic amputation) performed during the second and third waves of the pandemic in our clinic, and we compared these data with the same procedures performed in the corresponding periods of 2019, before the pandemic. RESULTS Surgical activity was significantly decreased during both periods; the only increase in surgical activity in 2021 compared to 2019 was in total hip, knee and shoulder arthroplasty, with a surge of +7.69% registered in the period September-December 2021. CONCLUSIONS Longer waiting lists and limited healthcare resources were the big challenges for the orthopedic community, and they still represent a substantial issue to confront today.
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Affiliation(s)
- Giovanni Vicenti
- Orthopaedics Unit, Department of Basic Medical Science, Neuroscience and Sensory Organs, School of Medicine, University of Bari “Aldo Moro”, AOU Consorziale Policlinico, 70124 Bari, Italy
| | - Davide Bizzoca
- Orthopaedics Unit, Department of Basic Medical Science, Neuroscience and Sensory Organs, School of Medicine, University of Bari “Aldo Moro”, AOU Consorziale Policlinico, 70124 Bari, Italy
- PhD Program in Public Health, Clinical Medicine and Oncology, University of Bari “Aldo Moro”, Piazza Giulio Cesare 11, 70124 Bari, Italy
| | - Elisa Pesare
- Orthopaedics Unit, Department of Basic Medical Science, Neuroscience and Sensory Organs, School of Medicine, University of Bari “Aldo Moro”, AOU Consorziale Policlinico, 70124 Bari, Italy
| | - Michele Grasso
- Orthopaedics Unit, Department of Basic Medical Science, Neuroscience and Sensory Organs, School of Medicine, University of Bari “Aldo Moro”, AOU Consorziale Policlinico, 70124 Bari, Italy
| | - Walter Ginestra
- Orthopaedics Unit, Department of Basic Medical Science, Neuroscience and Sensory Organs, School of Medicine, University of Bari “Aldo Moro”, AOU Consorziale Policlinico, 70124 Bari, Italy
| | - Biagio Moretti
- Orthopaedics Unit, Department of Basic Medical Science, Neuroscience and Sensory Organs, School of Medicine, University of Bari “Aldo Moro”, AOU Consorziale Policlinico, 70124 Bari, Italy
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Glinkowski WM. Telemedicine Orthopedic Consultations Duration and Timing in Outpatient Clinical Practice During the COVID-19 Pandemic. Telemed J E Health 2022; 29:778-787. [PMID: 36251954 DOI: 10.1089/tmj.2022.0217] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
Abstract
Introduction: Orthopedic associations advocated telemedicine during the COVID-19 pandemic to prevent disease transmission without hindering providing services to orthopedic patients. The study aimed to evaluate outpatient orthopedic teleconsultations' timing, length, and organizational issues in the circumstances of the COVID-19 pandemic based on consecutive orthopedic teleconsultations during the period of the first lockdown. Methods: Orthopedic telemedical consultations (OTCs) were provided from March 23, 2020, to June 1, 2020, and analyzed retrospectively based on mobile smartphone billing and electronic health record. Teleconsultations were based on the legal regulations of telemedicine services in Poland. Results: One thousand seventy-one patients (514 women and 557 men) with a mean age of 41.7 were teleconsulted. The length of the OTC averagely lasted 13.36 min (standard deviation 8.63). Consulted patients suffered from orthopedic disorders 65.3%, musculoskeletal injuries 26.3%, and other diseases 8.4%. Most OTCs were delayed (74.22%) concerning the planned schedule, with a median delay time of 12 min. Only 7.3% of teleconsultations were held precisely on time. Conclusions: Televisit length may not be dependent on gender, older age, or more diagnoses. The services like e-prescriptions, e-Referrals, e-Orders for orthotics, and e-Sick-leaves influence OTC length. Any extension of the patient's OTC may create a "snowball effect" of further delay for each subsequent OTC. Orthopedic teleconsultation requires new understanding and skills by both the patient and specialist physicians. Future research directions should concern the practical aspects of orthopedic teleconsultations, like legal, organizational, and technological issues and their implementation.
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Affiliation(s)
- Wojciech, M. Glinkowski
- Center of Excellence “TeleOrto” for Telediagnostics and Treatment of Disorders and Injuries of the Locomotor System, Department of Medical Informatics and Telemedicine, Medical University of Warsaw, Warsaw, Poland
- Polish Telemedicine and eHealth Society, Warsaw, Poland
- Gabinet Lekarski, Warsaw, Poland
- Centrum Medyczne PZU Zdrowie, Warsaw, Poland
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Jou E, Zhou AK, Ho JSY, Thahir A. Perioperative use of intra-articular steroids during the COVID-19 pandemic. EUROPEAN JOURNAL OF ORTHOPAEDIC SURGERY & TRAUMATOLOGY : ORTHOPEDIE TRAUMATOLOGIE 2022; 32:1225-1235. [PMID: 34468841 PMCID: PMC8408365 DOI: 10.1007/s00590-021-03105-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/29/2021] [Accepted: 08/23/2021] [Indexed: 12/15/2022]
Abstract
PURPOSE There are growing concerns with the widely used glucocorticoids during the Coronavirus disease-19 (COVID-19) pandemic due to the associated immunosuppressive effects, which may increase the risk of COVID-19 infection and worsen COVID-19 patient outcome. Heavily affecting orthopaedics, the pandemic led to delay and cancellation of almost all surgical cases, and procedures including perioperative intra-articular corticosteroid injections (ICIs) saw similar decreases. However, the benefits of ICI treatments during the pandemic may outweigh these potential risks, and their continued use may be warranted. METHODS A literature search was conducted, and all relevant articles including original articles and reviews were identified and considered in full for inclusion, and analysed with expert opinion. Epidemiological statistics and medical guidelines were consulted from relevant authorities. RESULTS ICIs allow a targeted approach on the affected joint and are effective in reducing pain while improving functional outcome and patient quality-of-life. ICIs delay the requirement for surgery, accommodating for the increased healthcare burden during the pandemic, while reducing postoperative hospital stay, bringing significant financial benefits. However, ICIs can exert systemic effects and suppress the immune system. ICIs may increase the risk of COVID-19 infection and reduce the efficacy of COVID-19 vaccinations, leading to important public health implications. CONCLUSION Perioperative ICI treatments may bring significant, multifaceted benefits during the pandemic. However, ICIs increase the risk of infection, and perioperative COVID-19 is associated with mortality. The use of ICIs during the COVID-19 pandemic should therefore be considered carefully on an individual patient basis, weighing the associated risks and benefits.
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Affiliation(s)
- Eric Jou
- School of Clinical Medicine, University of Cambridge, Cambridge, UK.
- MRC Laboratory of Molecular Biology, Cambridge Biomedical Campus, Cambridge, UK.
| | | | | | - Azeem Thahir
- School of Clinical Medicine, University of Cambridge, Cambridge, UK
- Department of Trauma and Orthopaedic Surgery, Addenbrooke's Hospital, Cambridge University Hospitals NHS Foundation Trust, Cambridge, UK
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Mohammed F, Mohaddis M, Cheruvu MS, Morris RM, Naim Z, Khan S, Mushtaq MB, Chandran P. Influence of COVID-19 Protocols on the Efficiency of Trauma Theater: Retrospective Observational Study. Interact J Med Res 2022; 11:e35805. [PMID: 35704770 PMCID: PMC9278405 DOI: 10.2196/35805] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2021] [Revised: 02/09/2022] [Accepted: 04/26/2022] [Indexed: 11/13/2022] Open
Abstract
BACKGROUND The COVID-19 pandemic has influenced health care delivery significantly. Numerous studies have highlighted that trauma theater efficiency has decreased during the COVID-19 pandemic; however, there is limited information as to exactly which stage of the patient theater journey is causing this decreased efficiency and whether efficiency can be improved. In the trauma theater of Warrington Hospital, United Kingdom, we have attempted to maintain trauma theater efficiency despite the requirement for increased infection control. OBJECTIVE The aim of this study was to evaluate the effects of additional COVID-19 infection control protocols on trauma theater efficiency in our center, considering the length of time taken for specific theater events, and to find out whether our interventions were successful in maintaining theater efficiency. METHODS We compared the efficiency of the trauma theater in a busy unit in December 2019 (pre-COVID-19) and December 2020 (with COVID-19 protocols in place). We collected time logs for different theater events for each patient in December of both years and compared the data. RESULTS There was no significant difference in the average number of cases performed per session between the COVID-19 and pre-COVID-19 time periods (P=.17). Theater start time was significantly earlier during the COVID-19 period (P<.001). There was no significant difference between the two periods in transport time, check-in time, preprocedure time, anesthetic time, and the time between cases (P>.05). A significant difference was observed in the check-out time between the two groups in the two time periods, with checking out taking longer during the COVID-19 period (P<.001). CONCLUSIONS Our results show that our theater start times were earlier during the COVID-19 pandemic, and the overall theater efficiency was maintained despite the additional COVID-19 infection control protocols that were in place. These findings suggest that well-planned infection control protocols do not need to impede trauma theater efficiency in certain settings.
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Affiliation(s)
| | | | | | | | - Zahra Naim
- Shadan Institute of Medical Sciences, Hyderabad, India
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Iwatsuki K, Hashizume H, Hara Y, Okui N, Morizaki Y, Tada K, Matsui Y, Ishii H, Hirata H. Questionnaire survey about the effects of new lifestyles during the pandemic of COVID-19 on upper limb diseases. J Orthop Sci 2022:S0949-2658(22)00169-5. [PMID: 35803855 PMCID: PMC9236913 DOI: 10.1016/j.jos.2022.06.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/17/2022] [Revised: 04/23/2022] [Accepted: 06/07/2022] [Indexed: 11/09/2022]
Abstract
BACKGROUND The novel coronavirus (COVID-19) that emerged in 2019 and spread globally in 2020 has resulted in the imposition of lockdowns or a state of emergency in many cities worldwide. In Japan, a "new lifestyle" is being advocated. We hypothesize that the new lifestyle has changed people's use of their upper limbs during the COVID-19 pandemic. Therefore, through this questionnaire study, we aimed to determine the factors associated with exacerbation of symptoms during the pandemic and to investigate the current status of patients who require hand surgery. METHODS This study was a prospective multi-center questionnaire survey. This study was conducted in Japan from December 2020 to July 2021 at university and general hospitals in nine prefectures. A questionnaire was administered to patients who visited a hospital with symptoms of nerve entrapment syndrome, osteoarthritis, or tenosynovitis. RESULTS A total of 502 patients with a mean age of 63.8 years responded. The 240 patients who experienced exacerbation (exacerbated and markedly exacerbated) were compared with other patients (unchanged, improved, and markedly improved). An increase in the time spent on personal computers and smartphones was associated with exacerbation of hand symptoms. Patients who wanted to undergo surgery but were postponed due to COVID-19 accounted for 23.5% of the outpatients. The mean scores for pain, jitteriness, and anxious depression in these patients were significantly higher than those of patients who did not want surgery. CONCLUSIONS Our results suggest that an increase in the time spent on personal computers and smartphones is associated with exacerbation of hand symptoms during the COVID-19 pandemic. Patients who wanted to undergo surgery but were postponed by COVID-19 experienced greater pain, jitteriness, and anxious depression.
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Affiliation(s)
- Katsuyuki Iwatsuki
- Department of Hand Surgery, Graduate School of Medicine, Nagoya University, 65 Turumaicho Showa-ku, Nagoya, Aichi, 466-8550, Japan,Department of Orthopaedic Surgery, Kani Tono Hospital, 1211-5 Dota, Kani, Gifu, 509-0206, Japan,Corresponding author. Department of Hand Surgery, Graduate School of medicine, Nagoya University, 65 Turumaicho Showa-ku, Nagoya, Aichi, 466-8550, Japan
| | - Hiroyuki Hashizume
- Director of Kasaoka Daiichi Hospital, 1945 Yokoshima, Kasaoka, Okayama, 714-0043, Japan
| | - Yuki Hara
- Depertment of Orthopaedic Surgery, Faculty of Medicine, University of Tsukuba, Tennoudai 1-1-1, Tsukuba, Ibaraki, 305-8577, Japan
| | - Nobuyuki Okui
- Department of Orthopaedic Surgery, Yokkaichi Municipal Hospital, 2-2-37 Shibata, Yokkaichi, Mie, 510-8567, Japan
| | - Yutaka Morizaki
- Department of Orthopaedic Surgery, The University of Tokyo Hospital, 7-3-1, Hongo, Bunkyo-ku, Tokyo, 113-8655, Japan
| | - Kaoru Tada
- Department of Orthopaedic Surgery, Graduate School of Medical Science, Kanazawa University, 13-1 Takaramachi, Kanazawa, Ishikawa, 920-8641, Japan
| | - Yuichiro Matsui
- Faculty of Dental Medicine, Hokkaido University, Kita 13, Nishi 7, Kita-ku, Sapporo, Hokkaido, 060-8586, Japan,Department of Orthopaedic Surgery, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Kita 15, Nishi 7, Kita-ku, Sapporo, Hokkaido, 060-8638, Japan
| | - Hisao Ishii
- Department of Orthopaedics, Hand Center, Chutoen General Medical Center, 1-1 Shobugaike, Kakegawa, Shizuoka, 436-8555, Japan
| | - Hitoshi Hirata
- Department of Hand Surgery, Graduate School of Medicine, Nagoya University, 65 Turumaicho Showa-ku, Nagoya, Aichi, 466-8550, Japan
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