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  1. Article ; Online: Muscle Mass Assessment in Sarcopenia: A Narrative Review.

    Muraki, Isao

    JMA journal

    2023  Volume 6, Issue 4, Page(s) 381–386

    Abstract: Sarcopenia is a condition characterized by age-related muscle loss and dysfunction. Over the past decade, several working groups have developed diagnostic criteria for sarcopenia, including muscle mass, grip strength, and gait speed measurements. However, ...

    Abstract Sarcopenia is a condition characterized by age-related muscle loss and dysfunction. Over the past decade, several working groups have developed diagnostic criteria for sarcopenia, including muscle mass, grip strength, and gait speed measurements. However, there is debate over which muscle mass indicator is the most appropriate. Some groups used appendicular lean mass divided by height squared, whereas others used appendicular lean mass divided by body mass index. In addition, the association between muscle mass and long-term health outcomes is inconsistent. As a result, some experts question the necessity of using muscle mass as a diagnostic criterion for sarcopenia. This review summarizes the measurement methods and muscle mass indicators of previous studies, highlighting issues with past muscle mass assessments.
    Language English
    Publishing date 2023-09-29
    Publishing country Japan
    Document type Journal Article ; Review
    ZDB-ID 3053329-6
    ISSN 2433-3298 ; 2433-328X
    ISSN (online) 2433-3298
    ISSN 2433-328X
    DOI 10.31662/jmaj.2023-0053
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article ; Online: Role of Proprotein Convertase Subtilisin/Kexin Type 9 (PCSK9) on Lipid Metabolism and Insulin Resistance in Human.

    Muraki, Isao

    Journal of atherosclerosis and thrombosis

    2020  Volume 28, Issue 4, Page(s) 317–318

    MeSH term(s) Antibodies, Monoclonal, Humanized/pharmacology ; Anticholesteremic Agents/pharmacology ; Cholesterol, LDL/metabolism ; Coronary Disease/epidemiology ; Coronary Disease/metabolism ; Coronary Disease/prevention & control ; Heart Disease Risk Factors ; Humans ; Hypercholesterolemia/blood ; Hypercholesterolemia/drug therapy ; Hypercholesterolemia/metabolism ; Insulin Resistance ; Lipid Metabolism/drug effects ; Proprotein Convertase 9/antagonists & inhibitors ; Proprotein Convertase 9/metabolism ; Risk Assessment/methods
    Chemical Substances Antibodies, Monoclonal, Humanized ; Anticholesteremic Agents ; Cholesterol, LDL ; PCSK9 protein, human (EC 3.4.21.-) ; Proprotein Convertase 9 (EC 3.4.21.-) ; evolocumab (LKC0U3A8NJ)
    Language English
    Publishing date 2020-10-01
    Publishing country Japan
    Document type Editorial
    ZDB-ID 2011474-6
    ISSN 1880-3873 ; 1340-3478
    ISSN (online) 1880-3873
    ISSN 1340-3478
    DOI 10.5551/jat.ED144
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Article ; Online: Sleep Duration and Daytime Napping and Risk of Type 2 Diabetes Among Japanese Men and Women: The Japan Collaborative Cohort Study for Evaluation of Cancer Risk.

    Okada, Reiko / Teramoto, Masayuki / Muraki, Isao / Tamakoshi, Akiko / Iso, Hiroyasu

    Journal of epidemiology

    2023  Volume 33, Issue 11, Page(s) 562–568

    Abstract: Background: Little is known about the impacts of sleep duration and daytime napping on the risk of type 2 diabetes mellitus (T2DM).: Methods: In this study, 20,318 participants (7,597 men, 12,721 women) aged 40-79 years without a history of T2DM, ... ...

    Abstract Background: Little is known about the impacts of sleep duration and daytime napping on the risk of type 2 diabetes mellitus (T2DM).
    Methods: In this study, 20,318 participants (7,597 men, 12,721 women) aged 40-79 years without a history of T2DM, stroke, coronary heart disease, or cancer at baseline (1988-1990), completed the baseline survey and the 5-year follow-up questionnaires, which included average sleep duration, napping habits, and self-reports of physician-diagnosed diabetes. The multivariable odds ratios (ORs) with 95% confidence intervals (CIs) were calculated using a logistic regression model.
    Results: During the 5-year follow-up, 531 new cases of T2DM (266 men and 265 women) were documented. Sleep duration ≥10 hours was associated with higher risk of T2DM compared to sleep duration of 7 hours (OR 1.99; 95% CI, 1.28-3.08). The excess risk was observed for both sexes and primarily found among the non-overweight; the multivariable ORs of sleeping ≥10 hours compared to 7 hours were 2.05 (95% CI, 1.26-3.35) for the non-overweight (BMI <25 kg/m
    Conclusion: Long sleep duration was associated with the risk of T2DM in both sexes, which was confined to the non-overweight.
    MeSH term(s) Male ; Humans ; Female ; Diabetes Mellitus, Type 2/epidemiology ; Diabetes Mellitus, Type 2/complications ; Cohort Studies ; Sleep Duration ; East Asian People ; Japan/epidemiology ; Sleep ; Overweight ; Risk Factors ; Neoplasms
    Language English
    Publishing date 2023-02-18
    Publishing country Japan
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 1442118-5
    ISSN 1349-9092 ; 0917-5040
    ISSN (online) 1349-9092
    ISSN 0917-5040
    DOI 10.2188/jea.JE20220118
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  4. Article ; Online: Prospective cohort study on potato intake and mortality from cardiovascular diseases: the Japan Collaborative Cohort Study (JACC study).

    Kimura, Hitomi / Yamagishi, Kazumasa / Muraki, Isao / Tamakoshi, Akiko / Iso, Hiroyasu

    European journal of nutrition

    2023  Volume 62, Issue 4, Page(s) 1859–1866

    Abstract: Purpose: The association between potato intake and risk of cardiovascular diseases is unknown. This study aimed to examine the association between potatoes intake and mortality from stroke and coronary heart disease among Japanese.: Methods: The ... ...

    Abstract Purpose: The association between potato intake and risk of cardiovascular diseases is unknown. This study aimed to examine the association between potatoes intake and mortality from stroke and coronary heart disease among Japanese.
    Methods: The study included 74,750 participants of the Japan Collaborative Cohort Study, aged 40-79, who were initially free of cardiovascular diseases or cancer at baseline (1988-1990) and provided information on their potato intake. Hazard ratios and 95% confidence intervals were estimated by fitting a Cox proportional hazards model according to the frequency of potatoes intake (0, 0.4, 1.5, 3.5 and 7 servings per week) adjusting for geographic location, age, body mass index, drinking status, smoking status, perceived mental stress, education level, walking time, dietary intakes of total energy, meat, fish, vegetables, fruit, dairy products, cakes, and salt.
    Results: Over a median of 19.2 years of follow-up, 4908 deaths from cardiovascular diseases were identified: 1019 from coronary heart diseases and 2153 from strokes (738 ischemic strokes and 495 hemorrhagic strokes). After adjustment for potential confounding factors, the hazard ratio of mortality from cardiovascular diseases for daily potato intake compared with no potato intake was 0.82 (95% confidence interval: 0.70, 0.95) among women, and 1.01 (0.88, 1.16) among men. Among women, the multivariable hazard ratios were 0.67 (0.48, 0.96) for coronary heart disease, 0.83 (0.66-1.05) for total stroke, 0.70 (0.43-1.15) for hemorrhagic stroke, and 0.75 (0.49-1.13) for ischemic stroke.
    Conclusion: We found an inverse association of potato intake with mortality from total cardiovascular diseases, especially that from coronary heart disease, among Japanese women. To our knowledge, this is the first report to show an inverse association between potato intake and total cardiovascular diseases.
    MeSH term(s) Animals ; Cardiovascular Diseases ; Cohort Studies ; Diet ; Prospective Studies ; Japan/epidemiology ; Proportional Hazards Models ; Coronary Disease/epidemiology ; Stroke/epidemiology ; Risk Factors
    Language English
    Publishing date 2023-03-01
    Publishing country Germany
    Document type Journal Article
    ZDB-ID 1466536-0
    ISSN 1436-6215 ; 1436-6207
    ISSN (online) 1436-6215
    ISSN 1436-6207
    DOI 10.1007/s00394-023-03111-1
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  5. Article ; Online: Corrigendum to "Secondhand smoke and the risk of incident cardiovascular disease among never-smoking women" [Preventive Medicine 162 (2022) 107145].

    Kobayashi, Yuka / Yamagishi, Kazumasa / Muraki, Isao / Kokubo, Yoshihiro / Saito, Isao / Yatsuya, Hiroshi / Iso, Hiroyasu / Tsugane, Shoichiro / Sawada, Norie

    Preventive medicine

    2022  Volume 167, Page(s) 107396

    Language English
    Publishing date 2022-12-28
    Publishing country United States
    Document type Published Erratum
    ZDB-ID 184600-0
    ISSN 1096-0260 ; 0091-7435
    ISSN (online) 1096-0260
    ISSN 0091-7435
    DOI 10.1016/j.ypmed.2022.107396
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  6. Article ; Online: Sleep Duration and Daytime Napping and Risk of Type 2 Diabetes Among Japanese Men and Women

    Reiko Okada / Masayuki Teramoto / Isao Muraki / Akiko Tamakoshi / Hiroyasu Iso

    Journal of Epidemiology, Vol 33, Iss 11, Pp 562-

    The Japan Collaborative Cohort Study for Evaluation of Cancer Risk

    2023  Volume 568

    Abstract: Background: Little is known about the impacts of sleep duration and daytime napping on the risk of type 2 diabetes mellitus (T2DM). Methods: In this study, 20,318 participants (7,597 men, 12,721 women) aged 40–79 years without a history of T2DM, stroke, ... ...

    Abstract Background: Little is known about the impacts of sleep duration and daytime napping on the risk of type 2 diabetes mellitus (T2DM). Methods: In this study, 20,318 participants (7,597 men, 12,721 women) aged 40–79 years without a history of T2DM, stroke, coronary heart disease, or cancer at baseline (1988–1990), completed the baseline survey and the 5-year follow-up questionnaires, which included average sleep duration, napping habits, and self-reports of physician-diagnosed diabetes. The multivariable odds ratios (ORs) with 95% confidence intervals (CIs) were calculated using a logistic regression model. Results: During the 5-year follow-up, 531 new cases of T2DM (266 men and 265 women) were documented. Sleep duration ≥10 hours was associated with higher risk of T2DM compared to sleep duration of 7 hours (OR 1.99; 95% CI, 1.28–3.08). The excess risk was observed for both sexes and primarily found among the non-overweight; the multivariable ORs of sleeping ≥10 hours compared to 7 hours were 2.05 (95% CI, 1.26–3.35) for the non-overweight (BMI <25 kg/m2) and 1.38 (95% CI, 0.49–3.83) for the overweight (BMI ≥25 kg/m2). The respective ORs of nappers versus non-nappers were 1.30 (95% CI, 1.03–1.63) and 0.92 (95% CI, 0.65–1.29). Among the non-overweight, nappers who slept ≥10 hours had the highest risk of T2DM (OR 2.84; 95% CI, 1.57–5.14), non-nappers who slept ≥10 hours (OR 2.27; 95% CI, 1.27–4.06), and nappers who slept <10 hours (OR 1.30; 95% CI, 1.03–1.64), compared with non-nappers who slept <10 hours. Conclusion: Long sleep duration was associated with the risk of T2DM in both sexes, which was confined to the non-overweight.
    Keywords sleep duration ; napping ; type 2 diabetes ; cohort study ; Medicine (General) ; R5-920
    Subject code 331
    Language English
    Publishing date 2023-11-01T00:00:00Z
    Publisher Japan Epidemiological Association
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  7. Article ; Online: Risk and population attributable fraction of stroke subtypes in Japan.

    Yatsuya, Hiroshi / Yamagishi, Kazumasa / Li, Yuanying / Saito, Isao / Kokubo, Yoshihiro / Muraki, Isao / Inoue, Manami / Tsugane, Shoichiro / Iso, Hiroyasu / Sawada, Norie

    Journal of epidemiology

    2023  

    Abstract: Background: Associations of major risk factors for stroke with total and each type of stroke as well as subtypes of ischemic stroke and their population attributable fractions had not been examined comprehensively.: Methods: Participants of the Japan ...

    Abstract Background: Associations of major risk factors for stroke with total and each type of stroke as well as subtypes of ischemic stroke and their population attributable fractions had not been examined comprehensively.
    Methods: Participants of the Japan Public Health Center-based prospective (JPHC) Study Cohort II without histories of cardiovascular disease and cancer (n=14,797) were followed from 1993 through 2012. Associations of current smoking, hypertension, diabetes, overweight (body mass index ≥ 25 kg/m
    Results: Subjects with hypertension were 1.63 to 1.84 times more likely to develop any type of stroke. Diabetes, low HDLC, current smoking, overweight, urine protein, and arrhythmia were associated with risk of overall and ischemic stroke. Hypertension and urine protein were associated with risk of intracerebral hemorrhage while current smoking, hypertension, and low non-HDLC were associated with subarachnoid hemorrhage. Hypertension alone accounted for more than a quarter of stroke incidence, followed by current smoking and diabetes. High non-HDLC, current smoking, low HDLC, and overweight contributed mostly to large-artery occlusive stroke. Arrhythmia explained 13.2% of embolic stroke. Combined PAFs of all the modifiable risk factors for total, ischemic and large-artery occlusive strokes were 36.7 and 44.5% and 61.5%, respectively.
    Conclusion: Although there are differences according to the subtypes, hypertension could be regarded as the most crucial target for preventing strokes in Japan.
    Language English
    Publishing date 2023-07-15
    Publishing country Japan
    Document type Journal Article
    ZDB-ID 1442118-5
    ISSN 1349-9092 ; 0917-5040
    ISSN (online) 1349-9092
    ISSN 0917-5040
    DOI 10.2188/jea.JE20220364
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  8. Article ; Online: Sleep duration, its change, and risk of dementia among Japanese: The Japan Public Health Center-based Prospective Study.

    Miyata, Jun / Muraki, Isao / Iso, Hiroyasu / Yamagishi, Kazumasa / Yasuda, Nobufumi / Sawada, Norie / Inoue, Manami / Tsugane, Shoichiro

    Preventive medicine

    2024  Volume 180, Page(s) 107884

    Abstract: Objective: Previous findings on the association between sleep duration, changes in sleep duration, and long-term dementia risk were mixed. Thus, we aimed to investigate the association between midlife sleep duration, its change, and dementia.: Methods! ...

    Abstract Objective: Previous findings on the association between sleep duration, changes in sleep duration, and long-term dementia risk were mixed. Thus, we aimed to investigate the association between midlife sleep duration, its change, and dementia.
    Methods: We recruited 41,731 Japanese (40-71 years) and documented their habitual sleep duration at baseline (1990-1994) and a 5-year follow-up survey. Changes in sleep duration were calculated as differences between baseline and 5-year measurements. We identified dementia using the Long-Term Care Insurance system (2007-2016). Hazard ratios (HRs) and 95% confidence intervals (CIs) of dementia were calculated using the area-stratified Cox model.
    Results: During 360,389 person-years, 4621 participants exhibited dementia. The multivariable HRs of dementia compared with 7 h of sleep were 1.13 (95% CI: 0.98-1.30) for 3-5 h, 0.93 (0.85-1.02) for 6 h, 1.06 (0.99-1.14) for 8 h, 1.13 (1.01-1.27) for 9 h, and 1.40 (1.21-1.63) for 10-12 h with a J-shaped fashion (p for linear < 0.001 and quadratic < 0.001). For its change, the HRs compared with no change were 1.02 (0.90-1.16) for decreased ≥2 h, 0.95 (0.88-1.03) for decreased 1 h, 1.00 (0.91-1.09) for increased 1 h, and 1.37 (1.20-1.58) for increased ≥2 h. The positive association for decreased sleep duration was observed in individuals with an initial sleep duration of ≤7 h, but not in those with ≥8 h (p for interaction = 0.007).
    Conclusions: Long and increased sleep duration was associated with a higher risk of dementia.
    MeSH term(s) Humans ; Dementia/epidemiology ; Japan/epidemiology ; Prospective Studies ; Public Health ; Risk Factors ; Sleep ; Sleep Duration ; Adult ; Middle Aged ; Aged
    Language English
    Publishing date 2024-02-02
    Publishing country United States
    Document type Journal Article
    ZDB-ID 184600-0
    ISSN 1096-0260 ; 0091-7435
    ISSN (online) 1096-0260
    ISSN 0091-7435
    DOI 10.1016/j.ypmed.2024.107884
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  9. Article ; Online: Childhood secondhand smoke exposure and respiratory disease mortality among never-smokers: the Japan collaborative cohort study for evaluation of cancer risk.

    Kawachi, Haruna / Teramoto, Masayuki / Muraki, Isao / Shirai, Kokoro / Yamagishi, Kazumasa / Tamakoshi, Akiko / Iso, Hiroyasu

    Journal of public health (Oxford, England)

    2023  Volume 45, Issue 3, Page(s) 604–611

    Abstract: Background: The main source of secondhand smoke (SHS) exposure during childhood occurs at home due to close family members who smoke. This study examined the association between childhood SHS exposure and the risk of respiratory disease mortality among ... ...

    Abstract Background: The main source of secondhand smoke (SHS) exposure during childhood occurs at home due to close family members who smoke. This study examined the association between childhood SHS exposure and the risk of respiratory disease mortality among non-smoking adults.
    Methods: Data from 44 233 never-smoking Japanese men and women aged 40-79 years who participated in the JACC study between 1988 and 1990 were analyzed. The Cox proportional hazards model was used to calculate hazard ratios and 95% confidence intervals of respiratory disease mortality according to the number of smoking family members during childhood. Subdistribution HRs (SHRs) were calculated as a competing risk analysis.
    Results: A total of 735 deaths from respiratory diseases were documented in a median follow-up of 19.2 years. Living with three or more smoking family members during childhood was associated with a higher risk of respiratory disease mortality in adulthood among women; multivariable SHR compared with participants with no family member smokers during childhood was 1.60 (1.01-2.54) for participants with three or more family members who smoked during their childhood.
    Conclusions: SHS exposure from three or more family members during childhood was associated with an increased risk of respiratory disease-related mortality in adulthood.
    MeSH term(s) Male ; Adult ; Humans ; Female ; Cohort Studies ; Tobacco Smoke Pollution/adverse effects ; Japan/epidemiology ; Smokers ; Neoplasms ; Respiratory Tract Diseases ; Risk Factors
    Chemical Substances Tobacco Smoke Pollution
    Language English
    Publishing date 2023-05-10
    Publishing country England
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 2142082-8
    ISSN 1741-3850 ; 1741-3842
    ISSN (online) 1741-3850
    ISSN 1741-3842
    DOI 10.1093/pubmed/fdad056
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  10. Article ; Online: Dairy Intake and the Risk of Esophageal Cancer: The JACC Study.

    Arafa, Ahmed / Eshak, Ehab S / Shirai, Kokoro / Muraki, Isao / Tamakoshi, Akiko / Iso, Hiroyasu

    Journal of epidemiology

    2022  Volume 32, Issue 6, Page(s) 298–300

    MeSH term(s) Animals ; Dairy Products ; Diet ; Esophageal Neoplasms/epidemiology ; Humans ; Milk ; Risk Factors
    Language English
    Publishing date 2022-04-15
    Publishing country Japan
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 1442118-5
    ISSN 1349-9092 ; 0917-5040
    ISSN (online) 1349-9092
    ISSN 0917-5040
    DOI 10.2188/jea.JE20220037
    Database MEDical Literature Analysis and Retrieval System OnLINE

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