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  1. Article ; Online: Comparison of time courses in postoperative functional outcomes between simultaneous bilateral and unilateral total knee arthroplasty with propensity score matching.

    Oka, Tomohiro / Wada, Osamu / Mizuno, Kiyonori

    Archives of orthopaedic and trauma surgery

    2023  Volume 144, Issue 1, Page(s) 369–375

    Abstract: Introduction/objectives: No consensus has been reached on which is better in terms of functional outcomes between simultaneous bilateral and unilateral total knee arthroplasty (TKA). As patient characteristics, such as age, sex, and body mass index, ... ...

    Abstract Introduction/objectives: No consensus has been reached on which is better in terms of functional outcomes between simultaneous bilateral and unilateral total knee arthroplasty (TKA). As patient characteristics, such as age, sex, and body mass index, have significant effects on functional outcomes after TKA, these factors should be matched before comparisons are made. This study aimed to compare time courses in functional outcomes between simultaneous bilateral TKA and unilateral TKA after matching the patient characteristics.
    Materials and methods: In this retrospective study, the clinical records of patients admitted to a hospital were reviewed. Of 425 patients, 43 underwent simultaneous bilateral TKA, whereas 382 underwent unilateral TKA. Propensity score matching was performed for age, sex, and body mass index between simultaneous bilateral and unilateral TKA patients. Therapists measured pain intensity, knee extensor strength, and knee-specific functional outcomes by using the new knee society score, including total score, symptoms, patient satisfaction, patient expectations, and functional activities preoperatively and 3 and 12 months postoperatively. Two-way repeated analysis of variance was performed to compare the time courses in functional outcomes between simultaneous bilateral and unilateral TKA.
    Results: After propensity score matching, 40 patients each for underwent bilateral TKA and unilateral TKA were selected. Knee extensor strength in simultaneous bilateral TKA patients was significantly lower than that in unilateral TKA patients at 3 months postoperatively (p = 0.04). A significant interaction was observed between the effects of time and group on knee extensor strength (F [1, 78] = 3.338; interaction: p = 0.042; η
    Conclusions: Patients who underwent simultaneous bilateral TKA should undergo postoperative rehabilitation focused on alleviating delayed recovery in knee extensor strength during the acute phase.
    MeSH term(s) Humans ; Arthroplasty, Replacement, Knee ; Retrospective Studies ; Propensity Score ; Osteoarthritis, Knee/surgery ; Knee Joint/surgery ; Treatment Outcome
    Language English
    Publishing date 2023-09-26
    Publishing country Germany
    Document type Journal Article
    ZDB-ID 80407-1
    ISSN 1434-3916 ; 0003-9330 ; 0344-8444
    ISSN (online) 1434-3916
    ISSN 0003-9330 ; 0344-8444
    DOI 10.1007/s00402-023-05065-9
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article: Association between knee function and kinesiophobia 6 months after anterior cruciate ligament reconstruction.

    Isaji, Yuichi / Yamada, Takumi / Oka, Tomohiro / Mori, Kazuaki / Aoyama, Naoki

    Journal of physical therapy science

    2023  Volume 35, Issue 2, Page(s) 128–132

    Abstract: Purpose] Kinesiophobia after anterior cruciate ligament reconstruction has been identified as an inhibitor of return to sports. This study aimed to clarify the relationship between kinesiophobia and knee function 6 months after anterior cruciate ... ...

    Abstract [Purpose] Kinesiophobia after anterior cruciate ligament reconstruction has been identified as an inhibitor of return to sports. This study aimed to clarify the relationship between kinesiophobia and knee function 6 months after anterior cruciate ligament reconstruction when the patient intends to return to sports. [Participants and Methods] A total of 66 patients who underwent primary anterior cruciate ligament reconstruction (mean age 17.3 ± 2.6 years, 17 males and 49 females, Tegner activity score ≥7) were included in the study. The 11-item version of Tampa scale of kinesiophobia was used to evaluate kinesiophobia 6 months postoperatively. Knee function was evaluated with knee extension muscle strength, tibial anterior displacement, heel buttock distance, heel height difference, anterior knee pain score, and single-leg hop test. The relationship between Tampa scale of kinesiophobia, patient characteristics, and knee function was investigated. [Results] A low Anterior knee pain score and low single-leg hop test, male gender, and age were significant factors associated with kinesiophobia. [Conclusion] Kinesiophobia was associated with a low anterior knee pain score and low single-leg hop test 6 months after anterior cruciate ligament reconstruction. Patients with a low single-leg hop test score or severe pain may need rehabilitation to reduce kinesiophobia.
    Language English
    Publishing date 2023-02-01
    Publishing country Japan
    Document type Journal Article
    ZDB-ID 2038898-6
    ISSN 0915-5287
    ISSN 0915-5287
    DOI 10.1589/jpts.35.128
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Article ; Online: Comparison of Acute-Phase Pain Intensity, Pain Trajectory, and the Number of Analgesics Administered between Total and Unicompartmental Knee Arthroplasties.

    Oka, Tomohiro / Imai, Ryota / Wada, Osamu / Mizuno, Kiyonori

    The journal of knee surgery

    2022  Volume 36, Issue 7, Page(s) 785–791

    Abstract: We aimed to compare the variables of pain intensity, pain trajectory, and the number of analgesics administered during the acute phase between total and unicompartmental knee arthroplasties. This prospective cohort study recruited 445 patients who ... ...

    Abstract We aimed to compare the variables of pain intensity, pain trajectory, and the number of analgesics administered during the acute phase between total and unicompartmental knee arthroplasties. This prospective cohort study recruited 445 patients who planned to undergo knee arthroplasty. Pain intensity was evaluated during hospitalization, and 1 month postoperatively using a numerical rating scale. Pain trajectory (slope and intercept) was calculated using pain intensity data from postoperative days 1 to 4. The number of analgesics administered for worsening pain was monitored during hospitalization. Multiple linear regression analysis with adjustment for potential confounders was conducted to investigate the impact of surgery type on pain variables. Data for 208 and 189 patients who had undergone total and unicompartmental knee arthroplasties, respectively, were included in this study. Pain intensity and pain trajectory were similar between the two surgeries. The number of analgesics administered on postoperative day 3 (
    MeSH term(s) Humans ; Arthroplasty, Replacement, Knee ; Pain Measurement ; Prospective Studies ; Treatment Outcome ; Analgesics/therapeutic use ; Pain, Postoperative/drug therapy ; Osteoarthritis, Knee/surgery
    Chemical Substances Analgesics
    Language English
    Publishing date 2022-02-18
    Publishing country Germany
    Document type Journal Article
    ZDB-ID 2075354-8
    ISSN 1938-2480 ; 1538-8506 ; 0899-7403
    ISSN (online) 1938-2480
    ISSN 1538-8506 ; 0899-7403
    DOI 10.1055/s-0042-1743228
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  4. Article: Comparison of Acute-Phase Pain Intensity, Pain Trajectory, and the Number of Analgesics Administered between Total and Unicompartmental Knee Arthroplasties

    Oka, Tomohiro / Imai, Ryota / Wada, Osamu / Mizuno, Kiyonori

    The Journal of Knee Surgery

    2022  Volume 36, Issue 07, Page(s) 785–791

    Abstract: We aimed to compare the variables of pain intensity, pain trajectory, and the number of analgesics administered during the acute phase between total and unicompartmental knee arthroplasties. This prospective cohort study recruited 445 patients who ... ...

    Abstract We aimed to compare the variables of pain intensity, pain trajectory, and the number of analgesics administered during the acute phase between total and unicompartmental knee arthroplasties. This prospective cohort study recruited 445 patients who planned to undergo knee arthroplasty. Pain intensity was evaluated during hospitalization, and 1 month postoperatively using a numerical rating scale. Pain trajectory (slope and intercept) was calculated using pain intensity data from postoperative days 1 to 4. The number of analgesics administered for worsening pain was monitored during hospitalization. Multiple linear regression analysis with adjustment for potential confounders was conducted to investigate the impact of surgery type on pain variables. Data for 208 and 189 patients who had undergone total and unicompartmental knee arthroplasties, respectively, were included in this study. Pain intensity and pain trajectory were similar between the two surgeries. The number of analgesics administered on postoperative day 3 ( p  = 0.01) and day 4 ( p  = 0.03), as well as total number ( p  = 0.01), were lower for unicompartmental knee arthroplasty than for total knee arthroplasty. Multiple linear regression analysis showed that the type of surgery affected the total number of analgesics administered (β = − 1.24, p  < 0.01, 95% confidence interval: −1.80 to −0.62). This study suggests that pain characteristics observed during the acute phase differ between total and unicompartmental knee arthroplasties. Postoperative pain should be managed, and rehabilitation should be provided at similar levels after the second postoperative day in total and unicompartmental knee arthroplasty patients.
    Keywords total knee arthroplasty ; unicompartmental knee arthroplasty ; acute postoperative pain ; number of analgesics administered
    Language English
    Publishing date 2022-02-18
    Publisher Thieme Medical Publishers, Inc.
    Publishing place Stuttgart ; New York
    Document type Article
    ZDB-ID 2075354-8
    ISSN 1938-2480 ; 1538-8506 ; 0899-7403
    ISSN (online) 1938-2480
    ISSN 1538-8506 ; 0899-7403
    DOI 10.1055/s-0042-1743228
    Database Thieme publisher's database

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  5. Article ; Online: Effectiveness of workplace active rest programme on low back pain in office workers: a stepped-wedge cluster randomised controlled trial.

    Tsuboi, Yamato / Oka, Tomohiro / Nakatsuka, Kiyomasa / Isa, Tsunenori / Ono, Rei

    BMJ open

    2021  Volume 11, Issue 6, Page(s) e040101

    Abstract: Objective: This study aimed to investigate the effectiveness of workplace active rest programme (WARP) on chronic low back pain (LBP) among office workers.: Design: A closed cohort, stepped-wedge cluster randomised trial was conducted. The total ... ...

    Abstract Objective: This study aimed to investigate the effectiveness of workplace active rest programme (WARP) on chronic low back pain (LBP) among office workers.
    Design: A closed cohort, stepped-wedge cluster randomised trial was conducted. The total duration of the study was 16 weeks (4 weeks for each step). Sequence allocation was randomised, but no one was blinded.
    Setting: This study was conducted in three offices in a Japanese electronics company. One office was for the administrative department, the others are for the engineering department.
    Participants: We recruited 29 office workers with LBP greater than 3 months. LBP due to specific injury or disease was excluded. The median age was 38 years, and 26 (90%) were male. All participants completed the study.
    Interventions: In the intervention phase, participants performed WARP comprising frequent stand-up and individualised brief exercise/physical activity during work. Physical therapists held an LBP workshop and developed tailor-made programmes before introducing WARP. We instructed participants to perform WARP at five timings during work. Control phase was set before the intervention and participants stayed as usual.
    Primary and secondary outcome measures: The primary outcome was pain intensity of LBP assessed using the Brief Pain Inventory. The secondary outcomes were work productivity loss measured using the Work Limitations Questionnaire, LBP disability assessed using the Roland-Morris Disability Questionnaire, psychosocial subscale assessed using the STarT Back Screening Tool and physical activity measured using triaxial accelerometers. These outcomes were collected at baseline and at 4-month follow-up evaluation.
    Results: In the intention-to-treat analysis, WARP did not show any significant effects on pain intensity (
    Conclusions: The present study was unable to confirm the effectiveness of active rest in improving LBP. Hence, further study needs to investigate its effectiveness.
    Trial registration number: UMIN000033210.
    MeSH term(s) Adult ; Efficiency ; Humans ; Low Back Pain/therapy ; Male ; Mass Screening ; Workplace
    Language English
    Publishing date 2021-06-25
    Publishing country England
    Document type Journal Article ; Randomized Controlled Trial ; Research Support, Non-U.S. Gov't
    ZDB-ID 2599832-8
    ISSN 2044-6055 ; 2044-6055
    ISSN (online) 2044-6055
    ISSN 2044-6055
    DOI 10.1136/bmjopen-2020-040101
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  6. Article ; Online: Frequency of working at home, body mass index, and productivity in Japanese office workers: A cohort study.

    Nakatsuka, Kiyomasa / Murata, Shunsuke / Oka, Tomohiro / Tsuboi, Yamato / Saeki, Kenta / Tezuka, Masato / Ono, Rei

    Work (Reading, Mass.)

    2022  

    Abstract: Background: Since the start of the COVID-19 pandemic, the number of people working at home has grown significantly.: Objective: This cohort study aimed to investigate whether the frequency of working at home was associated with changes in body mass ... ...

    Abstract Background: Since the start of the COVID-19 pandemic, the number of people working at home has grown significantly.
    Objective: This cohort study aimed to investigate whether the frequency of working at home was associated with changes in body mass index (BMI) and productivity from 2018 to 2020.
    Method: Frequency of working at home was self-reported. Participants were classified into three groups based on mean frequency of working at home per week (no working at home: ≦ 0.5 days, low frequency: 0.5 to 2.5 days, and high frequency: >2.5 days). Productivity was measured using a numerical rating scale, and BMI was calculated using height and weight. Changes in BMI and productivity were calculated by subtracting 2018 data from 2020 data. Linear regression analysis was performed by considering BMI and productivity change as outcomes and frequency of working at home as explanatory variable.
    Results: BMI change in the high frequency group was significantly smaller than in the group that did not work at home (crude; coefficient: -0.27; 95% CI: -0.55--0.01, adjusted; coefficient: -0.30; 95% CI: -0.60--0.01). Frequency of working at home was not associated with productivity change.
    Conclusion: Working at home may be a solution for preventing BMI from increasing significantly.
    Language English
    Publishing date 2022-09-05
    Publishing country Netherlands
    Document type Journal Article
    ZDB-ID 1394194-x
    ISSN 1875-9270 ; 1051-9815
    ISSN (online) 1875-9270
    ISSN 1051-9815
    DOI 10.3233/WOR-210249
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  7. Article: Effect of self-calf massage on the prevention of deep vein thrombosis after total knee arthroplasty: A randomized clinical trial.

    Oka, Tomohiro / Wada, Osamu / Nitta, Shingo / Maruno, Hideto / Mizuno, Kiyonori

    Physical therapy research

    2020  Volume 23, Issue 1, Page(s) 66–71

    Abstract: Objective: Deep vein thrombosis (DVT) is a severe complication after total knee arthroplasty (TKA). Performing self-calf massage may decrease the incidence of DVT. The purpose of this study was to investigate whether self-calf massage is effective for ... ...

    Abstract Objective: Deep vein thrombosis (DVT) is a severe complication after total knee arthroplasty (TKA). Performing self-calf massage may decrease the incidence of DVT. The purpose of this study was to investigate whether self-calf massage is effective for preventing DVT after TKA.
    Method: In all, 165 patients participated in the present study. Patients were randomized to one of two groups: the self-calf massage group or the control group. In the control group, patients started regular physical therapy. In the self-calf massage group, in addition to regular physical therapy, patients were instructed to massage their calf muscles 30 times from the distal to proximal side. This procedure was repeated three times and was completed in 2 mins during the 2 days following TKA. All patients were evaluated for DVT on postoperative day 3 using lower limb vein ultrasonography.
    Results: The incidence of DVT was significantly lower in the self-calf massage group than in the control group. Self-calf massage was associated with a lower incidence of DVT, whereas age and female sex were risk factors for DVT.
    Conclusion: This study showed that the self-calf massage may be beneficial for the prevention of DVT after TKA.
    Language English
    Publishing date 2020-02-25
    Publishing country Japan
    Document type Journal Article
    ISSN 2189-8448
    ISSN 2189-8448
    DOI 10.1298/ptr.E10014
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  8. Article: Importance of knee flexion range of motion during the acute phase after total knee arthroplasty.

    Oka, Tomohiro / Wada, Osamu / Asai, Tsuyoshi / Maruno, Hideto / Mizuno, Kiyonori

    Physical therapy research

    2020  Volume 23, Issue 2, Page(s) 143–148

    Abstract: Background: We investigate the association with knee flexion range of motion (ROM) during the acute phases and that at 12 months after total knee arthroplasty (TKA). We also clarified the cut-off ROM during the acute phases in predicting the goal of ... ...

    Abstract Background: We investigate the association with knee flexion range of motion (ROM) during the acute phases and that at 12 months after total knee arthroplasty (TKA). We also clarified the cut-off ROM during the acute phases in predicting the goal of knee flexion ROM at 12 months.
    Methods: In this retrospective study, 193 patients with knee osteoarthritis (female:144 patients, age:73.2 ± 7.7 years) who underwent unilateral TKA at an orthopedic clinic were recruited. They underwent assessments of knee flexion ROM at 5 days, 1 month, and 12 months after TKA. The goal of knee flexion ROM at 12 months after TKA was set at 120°. Single and logistic-regression analyses were performed with the dependent variables including the outcome of the goal of knee flexion ROM at 12 months, and the independent variables included knee flexion ROM at 5 days and 1 month, separately. We calculated the cut-off ROM at 5 days and 1 month for predicting the goal of knee flexion ROM at 12 months with receiver operating curve analysis.
    Results: Knee flexion ROM at 5 days and 1 month were significantly associated with the goal of that at 12 months (p < 0.01). The cut-off ROM were 85° at 5 days and 105° at 1 month separately.
    Conclusions: Our results suggest the importance of early improvement in knee flexion ROM after TKA, and that at 1 month postoperatively indicates the likelihood of achievement of the goal of knee flexion ROM at 12 months after TKA.
    Language English
    Publishing date 2020-08-05
    Publishing country Japan
    Document type Journal Article
    ISSN 2189-8448
    ISSN 2189-8448
    DOI 10.1298/ptr.E9996
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  9. Article ; Online: Association of fear of falling with acceleration-derived gait indices in older adults with knee osteoarthritis.

    Oka, Tomohiro / Asai, Tsuyoshi / Kubo, Hiroki / Fukumoto, Yoshihiro

    Aging clinical and experimental research

    2018  Volume 31, Issue 5, Page(s) 645–651

    Abstract: Background: Knee osteoarthritis (OA) and fear of falling (FoF) are important factors contributing to trunk oscillation during walking. It is of a clinical importance to clarify the association of FoF with trunk oscillation during walking in older adults ...

    Abstract Background: Knee osteoarthritis (OA) and fear of falling (FoF) are important factors contributing to trunk oscillation during walking. It is of a clinical importance to clarify the association of FoF with trunk oscillation during walking in older adults with knee OA (knee OA adults).
    Aim: The purpose of this study was to investigate the association of FoF with trunk oscillation during walking in knee OA adults.
    Methods: Forty-one patients who met the criteria participated in the study and were classified into two groups based on their answer to a question on FoF. An accelerometer was attached at the level of the third lumbar vertebra (L3) and the seventh cervical vertebra (C7), and the accelerations at L3 and C7 were measured during a 10-m gait test. Using these data, the acceleration-derived gait indices, such as stride time variability (STV), root mean square (RMS), and autocorrelation at the trunk in the anteroposterior (AP) and mediolateral (ML) directions, were computed.
    Results: FoF was associated with a higher STV value and a smaller RMS value in the ML direction at L3.
    Discussion: The decreased trunk oscillation in the ML direction in knee OA adults with FoF may reflect a positive, compensatory adaptation for trunk control.
    Conclusion: Knee OA adults with FoF decreased trunk oscillation during walking than those without FoF.
    MeSH term(s) Accidental Falls/prevention & control ; Aged ; Aged, 80 and over ; Case-Control Studies ; Fear/psychology ; Female ; Gait Analysis/methods ; Humans ; Osteoarthritis, Knee/psychology ; Torso/physiology
    Language English
    Publishing date 2018-08-20
    Publishing country Germany
    Document type Journal Article
    ZDB-ID 2104785-6
    ISSN 1720-8319 ; 1594-0667
    ISSN (online) 1720-8319
    ISSN 1594-0667
    DOI 10.1007/s40520-018-1022-x
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  10. Article ; Online: Value of the 3-min walk test and its association with motor functions in older adults.

    Kubo, Hiroki / Asai, Tsuyoshi / Fukumoto, Yoshihiro / Oshima, Kensuke / Koyama, Shota / Monjo, Hiroki / Tajitsu, Hirotsugu / Oka, Tomohiro

    Physiotherapy theory and practice

    2022  Volume 40, Issue 1, Page(s) 144–152

    Abstract: Background: The 3-min walk test (3MWT) has been used in the clinical setting.: Objective: To present the 3MWT value and investigate its association with motor and respiratory functions of healthy older adults.: Methods: Two hundred six older ... ...

    Abstract Background: The 3-min walk test (3MWT) has been used in the clinical setting.
    Objective: To present the 3MWT value and investigate its association with motor and respiratory functions of healthy older adults.
    Methods: Two hundred six older adults and 27 younger adults were enrolled. The 3MWT was assessed by the walking distance within 3 min. Knee extension muscle strength (KEMS), 5-repetition sit-to-stand (5 R-STS), Timed Up and Go (TUG), forced vital capacity (FVC), forced expiratory volume 1.0 (FEV1.0), maximal expiratory pressure (MEP), and maximal inspiratory pressure (MIP) were measured. The 3MWT distance was examined by age group (18-39, 60-69, 70-79, and 80-89 years). A multivariate regression analysis investigated the association between 3MWT and motor function test.
    Results: The 3MWT values in each age group were 273-385, 233-414, 93-351, and 171-345 m for men and 215-375, 220-349, 198-325, and 174-332 m for women respectively. The 3MWT values were correlated with age, body mass index (BMI), KEMS, 5 R-STS, TUG, FVC, FEV1.0, MEP, and MIP. On the multivariate regression analysis, 3MWT was significantly associated with BMI (standard beta = -0.18; 95% confidence interval [CI], -3.20 to 0.83), KEMS (standard beta = 0.37; 95% CI, 0.06-0.13), 5 R-STS (standard beta = -0.13; 95% CI, -5.70 to -0.13), and TUG (standard beta = -0.36; 95% CI, -17.15 to -7.73) in older adults (adjusted R
    Conclusions: The 3MWT distance decreased with age and was associated with motor and respiratory functions. No range trends were observed among groups. Our findings suggest that 3MWT reflects functional capacity.
    MeSH term(s) Male ; Humans ; Female ; Aged ; Adolescent ; Walk Test ; Muscle Strength/physiology ; Vital Capacity/physiology ; Respiratory Function Tests ; Forced Expiratory Volume/physiology
    Language English
    Publishing date 2022-08-11
    Publishing country England
    Document type Journal Article
    ZDB-ID 1045333-7
    ISSN 1532-5040 ; 0959-3985
    ISSN (online) 1532-5040
    ISSN 0959-3985
    DOI 10.1080/09593985.2022.2110849
    Database MEDical Literature Analysis and Retrieval System OnLINE

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