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Ushikoshi-Nakayama R, Yamazaki T, Omagari D, Matsumoto N, Inoue H, Nukuzuma C, Nishino S, Saito I. Evaluation of the benefits of neutral bicarbonate ionized water baths in an open-label, randomized, crossover trial. Sci Rep 2024; 14:1261. [PMID: 38218992 PMCID: PMC10787754 DOI: 10.1038/s41598-024-51851-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2023] [Accepted: 01/10/2024] [Indexed: 01/15/2024] Open
Abstract
We previously demonstrated that neutral bicarbonate ionized water (NBIW) bathing enhances blood flow by bicarbonate ions and described the underlying mechanism. However, additional clinical investigation was warranted to investigate the efficacy of NBIW bathing. Hence, we performed a randomized, open-label, crossover trial to examine the effects of NBIW bathing on mental stress, sleep, and immune function. Participants who regularly felt stressed were randomly assigned to NBIW or regular bathing for 4 weeks. Mental stress was assessed with the Brief Job Stress Questionnaire (BJSQ) and the Profile of Mood States Second Edition; sleep quality, with the Pittsburgh Sleep Quality Index Japanese version (PSQI-J) and actigraphy; and immune function, with laboratory tests. PSQI-J scores and actigraphy sleep latency and bed out latency improved significantly more with NBIW bathing than with regular bathing (p < 0.05). Furthermore, NBIW bathing reduced both stress-induced fluctuations in CD4+ and CD8+ T cell counts and fluctuations in the naive to memory T cell ratio and neutrophil phagocytosis, indicating improved immune function. These findings suggest that daily NBIW bathing could improve mental stress, sleep quality, and immune function and bring about positive health effects in those who experience stress in their daily lives.
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Affiliation(s)
- Ryoko Ushikoshi-Nakayama
- Department of Pathology, Tsurumi University School of Dental Medicine, 2-1-3 Tsurumi, Tsurumi-ku, Yokohama, Kanagawa, 230-8501, Japan
| | - Tomoe Yamazaki
- Department of Pathology, Tsurumi University School of Dental Medicine, 2-1-3 Tsurumi, Tsurumi-ku, Yokohama, Kanagawa, 230-8501, Japan
| | - Daisuke Omagari
- Department of Pathology, Tsurumi University School of Dental Medicine, 2-1-3 Tsurumi, Tsurumi-ku, Yokohama, Kanagawa, 230-8501, Japan
| | - Naoyuki Matsumoto
- Department of Pathology, Tsurumi University School of Dental Medicine, 2-1-3 Tsurumi, Tsurumi-ku, Yokohama, Kanagawa, 230-8501, Japan
| | - Hiroko Inoue
- Department of Pharmaceutical Sciences, Nihon Pharmaceutical University, 10281 Komuro, Ina-machi, Kitaadachi-gun, Saitama, 362-0806, Japan
| | - Chiyoko Nukuzuma
- Bicarbonate Thermotherapy Institute Co., Ltd., Park West Bldg. F7, 6-12-1 Nishishinjuku, Shinjuku-ku, Tokyo, 160-0023, Japan
| | - Seiji Nishino
- Psychiatry and Behavioral Sciences, Sleep and Circadian Neurobiology Laboratory, Stanford University School of Medicine, 3155 Porter Drive, Room 2016, Palo Alto, CA, 94304, USA
| | - Ichiro Saito
- Department of Pathology, Tsurumi University School of Dental Medicine, 2-1-3 Tsurumi, Tsurumi-ku, Yokohama, Kanagawa, 230-8501, Japan.
- Cranescience Co., Ltd., 3-9-8 Ginza, Chuo-ku, Tokyo, 104-8139, Japan.
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Takeshita R, Muramatsu K, Matsuda S. The Current Status of Suicide and Medical Care System in Japan: An Analysis of 81,407 Patients Using the Diagnosis Procedure Combination Database. TOHOKU J EXP MED 2023; 261:291-297. [PMID: 37793882 DOI: 10.1620/tjem.2023.j081] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/06/2023]
Abstract
Japan has a high suicide mortality rate compared to other developed countries. To reduce suicide mortality in Japan, it is important to systematically analyze factors related to death of patients with suicide attempt. This study aimed to analyze the characteristics of patients with suicide attempt, and the factors related to their death using the Diagnosis Procedure Combination (DPC) data- a nationally representative inpatient database. We collected 81,407 cases of suicide attempt from 2016 to 2018 from DPC data and performed a multilevel logistic analysis of factors associated with death discharges. The analysis results showed that patients who received psychiatric liaison care had a lower mortality rate, but only 0.6% of surviving patients received psychiatric liaison care after admission. The odds ratio (OR) of death was high for hanging (28.86; p < 0.001) and jumping (16.28; p < 0.001), compared to wrist cutting. Patients without a psychiatric diagnosis were more likely to choose means such as hanging (14.1%) than those with a psychiatric disorder. The weekend cases had a higher OR of death than weekday (Wednesday as reference) cases (Friday 1.14, p = 0.011; Saturday 1.60, p < 0.001; Sunday 1.67, p < 0.001). Based on these findings, we suggest that improving the availability and quality of psychiatric care in acute care hospitals and primary care settings, as well as enhancing the emergency department system on weekends, could help reduce the mortality of suicide attempts.
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Affiliation(s)
- Rina Takeshita
- Department of Preventive Medicine and Community Health, School of Medicine, University of Occupational and Environmental Health
| | - Keiji Muramatsu
- Department of Preventive Medicine and Community Health, School of Medicine, University of Occupational and Environmental Health
| | - Shinya Matsuda
- Department of Preventive Medicine and Community Health, School of Medicine, University of Occupational and Environmental Health
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Kurisu K, Harashima S, Fujimori M, Akechi T, Yoshiuchi K, Uchitomi Y. Regional disparities in suicide among patients with cancer: A nationwide population-based study in Japan. Cancer Med 2023; 12:20052-20058. [PMID: 37737044 PMCID: PMC10587921 DOI: 10.1002/cam4.6574] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2023] [Revised: 09/06/2023] [Accepted: 09/12/2023] [Indexed: 09/23/2023] Open
Abstract
BACKGROUND This study aimed to explore prefecture-level differences in suicide risk among patients with cancer in Japan. METHODS Data from the National Cancer Registry, which covers the entire Japanese population, were used. Patients diagnosed with cancer between 2016 and 2017 were included. The standardized mortality ratio (SMR) for suicide within 2 years after cancer diagnosis was quantified compared with the general population for each prefecture. Multivariate Poisson regression analysis was conducted to quantify the adjusted relative risk using Hokkaido as the reference. RESULTS The analysis included 2,133,502 patients. The SMRs were high among patients with cancer residing in certain prefectures, such as the Hokuriku region (the middle and western parts of Japan's main island). These areas also exhibited a significant relative risk in the Poisson regression model. CONCLUSION The results demonstrated that patients with cancer in certain prefectures in Japan have a high suicide risk.
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Affiliation(s)
- Ken Kurisu
- Division of Survivorship ResearchNational Cancer Center Institute for Cancer ControlTokyoJapan
- Department of Stress Sciences and Psychosomatic Medicine, Graduate School of MedicineThe University of TokyoTokyoJapan
| | - Saki Harashima
- Division of Survivorship ResearchNational Cancer Center Institute for Cancer ControlTokyoJapan
- Department of Stress Sciences and Psychosomatic Medicine, Graduate School of MedicineThe University of TokyoTokyoJapan
| | - Maiko Fujimori
- Division of Survivorship ResearchNational Cancer Center Institute for Cancer ControlTokyoJapan
| | - Tatsuo Akechi
- Department of Psychiatry and Cognitive‐Behavioral MedicineNagoya City University, Graduate School of Medical SciencesNagoyaJapan
| | - Kazuhiro Yoshiuchi
- Department of Stress Sciences and Psychosomatic Medicine, Graduate School of MedicineThe University of TokyoTokyoJapan
| | - Yosuke Uchitomi
- Division of Survivorship ResearchNational Cancer Center Institute for Cancer ControlTokyoJapan
- Innovation Center for Supportive, Palliative and Psychosocial Care, National Cancer CenterTokyoJapan
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