Masahiro Kohzuki

Prof. Dr. Masahiro Kohzuki

Department of Internal Medicine and Rehabilitation Science, Tohoku University Graduate School of Medicine, Aoba-ku, Sendai , Japan
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Research Focus & Metrics

Academic Career Length

33Years (1994-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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10 June 2016 in Dementia and Geriatric Cognitive Disorders Extra
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Journal Article
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MKMin-Ji Kim
Min-Ji Kim
CHChang-Wan Han
Chang-Wan Han
KMKyoung-Youn Min
Kyoung-Youn Min
CCChae-Yoon Cho
Chae-Yoon Cho
CLChae-Won Lee
Chae-Won Lee
Masahiro KohzukiMasahiro Kohzuki
Masahiro Kohzuki
Aims: This study aimed to investigate the effect of 6-month physical exercise with a multicomponent cognitive program (MCP) on the cognitive function of older adults with moderate to severe Alzheimer's disease (AD). Methods: We included 33 participants with AD in a 6-month randomized controlled trial. The intervention group participated in physical exercise and received a MCP. The control group received only the MCP. Before and after the intervention, cognitive outcomes were assessed using the Alzheimer's Disease Assessment Scale-Cognitive Subscale (ADAS-cog), Mini-Mental State Examination, and the Clock Drawing Test. Physical performance was evaluated by exercise time, the number of pedal rotation, total load, grip strength, and the Berg Balance Scale (BBS). Results: In all cognitive measures, there were no significant improvements between the two groups after 6 months in the baseline value-adjusted primary analysis. However, the ADAS-cog score was significantly lower between the two groups in secondary analysis adjusted for baseline value, age, sex, and education years. All physical outcomes were significantly higher in the intervention group except for total load compared with baseline measurements. Conclusion: This study indicates that it is possible to improve cognitive function in older adults with moderate to severe AD through 6-month physical exercise with a multicomponent cognitive intervention.

1 August 2020 in Journal of Cardiology
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AIAtsunori Itagaki
Atsunori Itagaki
KSKoji Sakurada
Koji Sakurada
MMMinoru Matsuhama
Minoru Matsuhama
JYJunji Yajima
Junji Yajima
TYTakeshi Yamashita
Takeshi Yamashita
Masahiro KohzukiMasahiro Kohzuki
Masahiro Kohzuki

21 June 2006 in Clinical and Experimental Pharmacology and Physiology
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MNMakoto Nagasaka
Makoto Nagasaka
Masahiro KohzukiMasahiro Kohzuki
Masahiro Kohzuki
TFToru Fujii
Toru Fujii
SKShinichi Kanno
Shinichi Kanno
TKTakayuki Kawamura
Takayuki Kawamura
YSYasufumi Sato
Yasufumi Sato

1 August 2020 in Clinical Interventions in Aging
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YMYixuan Ma
Yixuan Ma
WZWen Zhang
Wen Zhang
PHPeipei Han
Peipei Han
Masahiro KohzukiMasahiro Kohzuki
Masahiro Kohzuki
QGQi Guo
Qi Guo
Objective: The aims of this study were to investigate the association between osteosarcopenic obesity (OSO) and physical performance in Chinese elderly communities. Methods: Our study population is comprised of residents of the Township Central Hospital in the suburban of Tianjin, China. Participants (n=303; percent body fat (PBF): ≥ 25% for men and ≥ 32% for women) were assessed using the direct segmental multi-frequency bioelectrical impedance analysis (BIA) for body composition. Sarcopenia was defined as the lower 20th percentile of appendicular skeletal muscle mass/height2 (ASMI). A quantitative ultrasound scan of each participants’ calcaneus with a T score≤− 1.0 was used to identify the prevalence of osteopenia/osteoporosis (OP). We divided people into four groups: obesity only (O), osteopenic obesity (OO), sarcopenic obesity (SO), and osteosarcopenic obesity (OSO). We assessed the physical performance by grip strength, 4-m walk test (WS) and timed up and go test (TUGT). Results: A total of 303 participants had completed data (89 men, 214 women; mean age of 68.8± 6.0 years). The prevalence of OSO was 10.2% (men: 15.70%, women: 7.9%). After multiple adjustments, WS was significantly declined in OSO group when compared with the O group in men (mean value 95% CI was 0.84 (0.69, 0.99)) and women (mean value 95% CI was 0.93 (0.84, 1.02)). TUGT was significantly poorer in men (mean value 95% CI was 13.3 (10.6, 15.9)) and women (mean value 95% CI was 12.4 (11.2, 13.7)) with OSO when compared with the O group. Furthermore, the OSO group in women also had a significantly poorer TUGT compared with the OO group. The result of grip strength decreased significantly in women SO and OSO groups when compared with the O group (mean value 95% CI was 16.4 (14.5, 18.2) and 16.1 (13.9, 18.3)). But the results of grip strength in men showed no significant differences in any of the group. Conclusion: In Chinese community-dwelling elderly, slower WS and lower balance function were associated with OSO in men and women. Lower grip strength was associated with SO and OSO in women.

4 June 2019 in Cardiology Research and Practice
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TTTomoyuki Takura
Tomoyuki Takura
NENozomi Ebata-Kogure
Nozomi Ebata-Kogure
YGYoichi Goto
Yoichi Goto
Masahiro KohzukiMasahiro Kohzuki
Masahiro Kohzuki
MNMasatoshi Nagayama
Masatoshi Nagayama
HIHaruki Itoh
Haruki Itoh
Background. Medical costs associated with cardiovascular disease are increasing considerably worldwide; therefore, an efficacious, cost-effective therapy which allows the effective use of medical resources is vital. There have been few economic evaluations of cardiac rehabilitation (CR), especially meta-analyses of medical cost versus patient outcome.Methods. The target population in this meta-analysis included convalescent and comprehensive CR patients with coronary artery disease (CAD), the status most commonly observed postmyocardial infarction (MI). Here, we evaluated medical costs, quality-adjusted life year (QALY), cost-effectiveness, mortality, and life year (LY). Regarding cost-effectiveness analysis, we analyzed medical costs per QALY, medical costs per LY, and the incremental cost-utility ratio (ICUR). We then examined the differences in effects for the 2 treatment arms (CR vs. usual care (UC)) using the risk ratio (RR) and standardized mean difference (SMD).Results. We reviewed 59 studies and identified 5 studies that matched our selection criteria. In total, 122,485 patients were included in the analysis. Meta-analysis results revealed that the CR arm significantly improved QALY (SMD: −1.78; 95% confidence interval (CI): −2.69, −0.87) compared with UC. Although medical costs tended to be higher in the CR arm compared to the UC arm (SMD: 0.02; 95% CI: −0.08, 0.13), cost/QALY was significantly improved in the CR arm compared with the UC arm (SMD: −0.31; 95% CI: −0.53, −0.09). The ICURs for the studies (4 RCTs and 1 model analysis) were as follows: −48,327.6 USD/QALY; −5,193.8 USD/QALY (dominant, CR is cheaper and more effective than UC); and 4,048.0 USD/QALY, 17,209.4 USD/QALY, and 26,888.7 USD/QALY (<50,000 USD/QALY, CR is costlier but more effective than UC), respectively. Therefore, there were 2 dominant and 3 effective results.Conclusions. While there are some limitations, primarily regarding data sources, our results suggest that CR is potentially cost-effective.

25 February 2020 in Circulation Journal
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Journal Article
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HOHideki Origuchi
Hideki Origuchi
HIHaruki Itoh
Haruki Itoh
SMShin-Ichi Momomura
Shin-Ichi Momomura
RNRyuji Nohara
Ryuji Nohara
HDHiroyuki Daida
Hiroyuki Daida
YGYoichi Goto
Yoichi Goto
Background:There is little evidence regarding the effect of outpatient cardiac rehabilitation (CR) on exercise capacity or the long-term prognosis in patients after coronary artery bypass graft surgery (CABG). This study aimed to determine whether participation in outpatient CR improves exercise capacity and long-term prognosis in post-CABG Japanese patients in a multicenter cohort.Methods and Results:We enrolled 346 post-CABG patients who underwent cardiopulmonary exercise testing during early (2–3 weeks) and late (3–6 months) time points after surgery. They formed the Active (n=240) and Non-Active (n=106) CR participation groups and were followed for 3.5 years. Primary endpoint was a major adverse cardiac event (MACE): all-cause death or rehospitalization for acute myocardial infarction/unstable angina/worsening heart failure. Peak oxygen uptake at 3–5 months from baseline was significantly more increased in Active than in Non-Active patients (+26±24% vs. +19±20%, respectively; P<0.05), and the MACE rate was significantly lower in Active than Non-Active patients (3.4% vs. 10.5%, respectively; P=0.02). Multivariate Cox proportional hazard analysis showed that participation in outpatient CR was a significant prognostic determinant of MACE (P=0.03).Conclusions:This unique study showed that a multicenter cohort of patients who underwent CABG and actively participated in outpatient CR exhibited greater improvement in exercise capacity and better survival without cardiovascular events than their counterparts who did not participate.