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Shiraishi R, Ogawa T. Factors associated with an improvement in extracellular water-to-total body water ratio in older adults with hip fractures: A decision tree analysis. Clin Nutr ESPEN 2024; 63:378-383. [PMID: 38971405 DOI: 10.1016/j.clnesp.2024.06.058] [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: 03/15/2024] [Revised: 06/21/2024] [Accepted: 06/28/2024] [Indexed: 07/08/2024]
Abstract
BACKGROUND & AIMS The extracellular water-to-total body water ratio (ECW/TBW) increases with age and after fractures. A high ECW/TBW may hinder improvements in physical function and skeletal muscle mass. However, the effects of ECW/TBW improvement have not been properly investigated. The aim of this study was to investigate the factors associated with ECW/TBW improvement in older adults with hip fractures. METHODS This retrospective cohort study included 203 patients with hip fractures who were admitted to a convalescent rehabilitation ward. ECW/TBW and skeletal muscle mass index (SMI) were measured using bioelectrical impedance analysis. The patients were classified into two groups: those with an improvement in ECW/TBW (n = 123) and those without an improvement (n = 80). Decision tree analysis was performed to examine the factors associated with ECW/TBW improvement. As a secondary objective, a multiple regression analysis was performed to identify the factors associated with SMI gain. RESULTS Decision tree analysis identified rehabilitation volume and protein intake as the first and second factors most significantly associated with an improvement in ECW/TBW, respectively. Multiple regression analysis showed that improved ECW/TBW (β: 0.400, p < 0.001) was significantly associated with SMI gain. CONCLUSIONS Rehabilitation volume and protein intake are clinically important for improving ECW/TBW in older adults with hip fractures.
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Affiliation(s)
- Ryo Shiraishi
- Clinical Education and Research Center, Chuzan Hospital, 6-2-1 Matsumoto, Okinawa City, Okinawa, 904-2151, Japan; Department of Clinical Research and Quality Management, Graduate School of Medicine, University of the Ryukyus, Nishihara-cho, Okinawa, 903-0215, Japan.
| | - Takahiro Ogawa
- Clinical Education and Research Center, Chuzan Hospital, 6-2-1 Matsumoto, Okinawa City, Okinawa, 904-2151, Japan; Department of Rehabilitation Medicine, Aichi Medical University, Nagakute City, Aichi, 480-1103, Japan
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Akimoto T, Tasaki K, Ishihara M, Hara M, Nakajima H. Association of Body Water Balance, Nutritional Risk, and Sarcopenia with Outcome in Patients with Acute Ischemic Stroke: A Single-Center Prospective Study. Nutrients 2024; 16:2165. [PMID: 38999913 PMCID: PMC11243294 DOI: 10.3390/nu16132165] [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: 06/15/2024] [Revised: 07/05/2024] [Accepted: 07/06/2024] [Indexed: 07/14/2024] Open
Abstract
In the present study, we examined the inter-relationships between body water balance, nutritional risk, sarcopenia, and outcome after acute ischemic stroke (AIS) in patients who were living independently. We defined abnormal body water balance as overhydration, with an extracellular fluid/total body water ratio > 0.390. A geriatric nutritional risk index (GNRI) < 98 was considered low GNRI. Sarcopenia was defined according to the 2019 Asian Working Group for sarcopenia criteria. Poor outcome was defined as a modified Rankin scale (mRS) score ≥ 3 at discharge. Among 111 eligible patients (40 females, median age: 77 years), 43 had a poor prognosis, 31 exhibited overhydration, 25 had low GNRI, and 44 experienced sarcopenia. Patients with poor outcomes had significantly higher National Institutes of Health Stroke Scale (NIHSS) scores, which were significantly more common with overhydration, low GNRI, and sarcopenia (p < 0.001 for all). Concomitant overhydration, low GNRI, and sarcopenia were associated with poorer outcomes. In multivariate analysis, overhydration [odds ratio (OR) 5.504, 95% confidence interval (CI) 1.717-17.648; p = 0.004], age (OR 1.062, 95%CI 1.010-1.117; p = 0.020), and NIHSS score (OR 1.790, 95%CI 1.307-2.451; p < 0.001) were independent prognostic factors for poor outcome. The results indicated that the combination of overhydration, low GNRI, and sarcopenia predict poor outcomes following AIS. Overhydration was particularly associated with poor outcomes.
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Affiliation(s)
- Takayoshi Akimoto
- Division of Neurology, Department of Medicine, Nihon University School of Medicine, 30-1 Oyaguchi-Kamicho, Itabashi-ku, Tokyo 173-8610, Japan
| | - Kenta Tasaki
- Division of Neurology, Department of Medicine, Nihon University School of Medicine, 30-1 Oyaguchi-Kamicho, Itabashi-ku, Tokyo 173-8610, Japan
| | - Masaki Ishihara
- Division of Neurology, Department of Medicine, Nihon University School of Medicine, 30-1 Oyaguchi-Kamicho, Itabashi-ku, Tokyo 173-8610, Japan
| | - Makoto Hara
- Division of Neurology, Department of Medicine, Nihon University School of Medicine, 30-1 Oyaguchi-Kamicho, Itabashi-ku, Tokyo 173-8610, Japan
| | - Hideto Nakajima
- Division of Neurology, Department of Medicine, Nihon University School of Medicine, 30-1 Oyaguchi-Kamicho, Itabashi-ku, Tokyo 173-8610, Japan
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Yamaguchi S, Inami T, Ishida H, Nagata N, Murayama M, Morito A, Yamada S, Kohtake N. Bioimpedance analysis for identifying new indicators of exercise-induced muscle damage. Sci Rep 2024; 14:15299. [PMID: 38961243 PMCID: PMC11222495 DOI: 10.1038/s41598-024-66089-8] [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: 08/29/2023] [Accepted: 06/27/2024] [Indexed: 07/05/2024] Open
Abstract
A noninvasive, immediate, and convenient method for assessing muscle tissue status during exercise-induced muscle damage (EIMD) has not been established. This study was designed to assess and determine parameters suitable for measuring EIMD after eccentric exercise, using multi-frequency bioimpedance analysis (BIA). Thirty-five young male participants performed dumbbell exercises with their left arm, and their BIA parameters were measured at various time points up to 168 h post exercise using a multi-frequency BIA device. At all-time points, intra and extracellular water content was greater in the left arm than in the right arm, whereas the impedance, reactance, resistance, and phase angle were lower in the left arm than in the right arm. Established EIMD indices, such as maximal isometric voluntary contraction, were measured and used in correlational analyses. Only reactance was correlated with biomarkers, indicating muscle damage (r = - 0.56 to - 0.49). Furthermore, reactance was found to correlate well with indirect indicators of EIMD, suggesting that it may be a suitable marker for evaluating EIMD. However, the relationship with the limited evaluation indices employed in this study is constrained. Future studies should investigate the correlation between reactance and direct damage indicators, such as structural damage, observed in biopsies.
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Affiliation(s)
- Shota Yamaguchi
- Institute of Physical Education, Keio University, Yokohama, Japan
| | - Takayuki Inami
- Institute of Physical Education, Keio University, Yokohama, Japan.
| | - Hiroyuki Ishida
- Sports Medicine Research Center, Keio University, Yokohama, Japan
| | - Naoya Nagata
- Institute of Physical Education, Keio University, Yokohama, Japan
| | | | | | | | - Naohiko Kohtake
- Graduate School of System Design and Management, Keio University, Yokohama, Japan
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Kyosebekirov E, Kazakov D, Nikolova-Kamburova S, Stoilov V, Mitkovski E, Pavlov G, Stefanov C, Mollova-Kyosebekirova A. Bioimpedance analysis for fluid status assessment in critically ill septic patients. Folia Med (Plovdiv) 2024; 66:323-331. [PMID: 39365616 DOI: 10.3897/folmed.67.e125812] [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: 04/19/2024] [Accepted: 05/27/2024] [Indexed: 10/05/2024] Open
Abstract
AIM The aim of this study was to assess the usefulness of bioimpedance analysis in fluid status evaluation in patients with sepsis and septic shock admitted to the adult ICU.
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Peng J, Yang J, Li F. Association of bioimpedance analysis parameters trajectories with clinical outcomes in neurocritical patients. Heliyon 2024; 10:e32948. [PMID: 38994111 PMCID: PMC11238003 DOI: 10.1016/j.heliyon.2024.e32948] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/25/2023] [Revised: 06/12/2024] [Accepted: 06/12/2024] [Indexed: 07/13/2024] Open
Abstract
Background and objective Neurocritical patients often experience uncontrolled high catabolic metabolism state during the acuta phase of the disease. The complex interactions of neuroendocrine, inflammation, and immune system lead to massive protein breakdown and changes in body composition. Bioelectrical impedance analysis (BIA) evaluates the content and proportions of body components based on the principles of bioelectricity. Its parameters reflect the overall health status of the body and the integrity of cellular structure and function, playing an important role in assessing the disease status and predicting prognosis of such patients. This study explored the association of BIA parameters trajectories with clinical outcomes in neurocritical patients. Methods This study prospectively collected BIA parameters of 127 neurocritical patients in the Department of Neurology admitted to the NICU for the first 1-7 days. All these patients were adults (≥18 years old) experiencing their first onset of illness and were in the acute phase of the disease. The group-based trajectory modeling (GBTM), which aims to identify individuals following similar developmental trajectories, was used to identify potential subgroups of individuals based on BIA parameters. The short-term prognosis of patients in each trajectory group with variations in phase angle (PA) and extracellular water/total body water (ECW/TBW) over time was differentially analyzed, and the logistic regression model was used to analyze the relationship between potential trajectory groups of PA and ECW/TBW and the short-term prognosis of neurocritical patients. The outcome was Glasgow Outcome Scale (GOS) score at discharge. Results Four PA trajectories and four ECW/TBW trajectories were detected respectively in neurocritical patients. Among them, compared with the other latent subgroups, the "Low PA rapidly decreasing subgroup" and the "High ECW/TBW slowly rising subgroup" had higher incidences of adverse outcomes at discharge (GOS:1-3), in-hospital mortality, and length of neurology intensive care unit stay (all P < 0.05). After correcting for potential confounders, compared with the "Low PA rapidly decreasing subgroup", the risk of adverse outcome (GOS:1-3) was lower in the other three PA trajectories, with OR values of 0.0003, 0.0004, and 0.003 respectively (all P < 0.05). Compared with the "High ECW/TBW slowly rising subgroup", the risk of adverse outcome (GOS:1-3) was lower in the other three ECW/TBW trajectories, with OR values of 0.013, 0.035 and 0.038 respectively (all P < 0.05). Conclusion Latent PA trajectories and latent ECW/TBW trajectories during 1-7 days after admission were associated with the clinical outcomes of neurocritical patients. The risk of adverse outcomes was highest in the "Low PA rapidly decreasing subgroup" and the "High ECW/TBW slowly rising subgroup". These results reflected the overall health status and nutritional condition of neurocritical patients at the onset of the disease, and demonstrated the dynamic change process in body composition caused by the inflammatory response during the acute phase of the disease. This provided a reference basis for the observation and prognostic evaluation of such patients.
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Affiliation(s)
- Jingjing Peng
- Department of Neurosurgery, The First Affiliated Hospital of Chongqing Medical University, Chongqing, 400016, People's Republic of China
| | - Jiajia Yang
- Department of Neurology, The First Affiliated Hospital of Chongqing Medical University, Chongqing, 400016, People's Republic of China
| | - Feng Li
- Department of Neurology, The First Affiliated Hospital of Chongqing Medical University, Chongqing, 400016, People's Republic of China
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Luna TB, Bello JLG, Carbonell AG, Montoya ADLCR, Lafargue AL, Ciria HMC, Zulueta YA. Integrating classification and regression learners with bioimpedance methods for estimating weight status in infants and juveniles from the southern Cuba region. BMC Pediatr 2024; 24:370. [PMID: 38811864 PMCID: PMC11134843 DOI: 10.1186/s12887-024-04841-9] [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: 03/21/2024] [Accepted: 05/17/2024] [Indexed: 05/31/2024] Open
Abstract
OBJECTIVE The search for other indicators to assess the weight and nutritional status of individuals is important as it may provide more accurate information and assist in personalized medicine. This work is aimed to develop a machine learning predictions of weigh status derived from bioimpedance measurements and other physical parameters of healthy younger volunteers from Southern Cuba Region. METHODS A pilot random study at the Pediatrics Hospital was conducted. The volunteers were selected between 2002 and 2008, ranging in age between 2 and 18 years old. In total, 776 female and male volunteers are studied. Along the age and sex in the cohort, volunteers with class I obesity, overweight, underweight and with normal weight are considered. The bioimpedance parameters are obtained by measuring standard tetrapolar whole-body configuration. The bioimpedance analyser is used, collecting fundamental bioelectrical and other parameters of interest. A classification model are performed, followed by a prediction of the body mass index. RESULTS The results derived from the classification leaner reveal that the size, body density, phase angle, body mass index, fat-free mass, total body water volume according to Kotler, body surface area, extracellular water according to Kotler and sex largely govern the weight status of this population. In particular, the regression model shows that other bioparameters derived from impedance measurements can be associated with weight status estimation with high accuracy. CONCLUSION The classification and regression predictive models developed in this work are of the great importance to assist the diagnosis of weigh status with high accuracy. These models can be used for prompt weight status evaluation of younger individuals at the Pediatrics Hospital in Santiago de Cuba, Cuba.
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Affiliation(s)
- Taira Batista Luna
- Autonomous University of Santo Domingo (UASD), UASD Nagua Center, Nagua, Dominican Republic.
| | - Jose Luis García Bello
- Autonomous University of Santo Domingo (UASD), San Francisco de Macorís Campus, Santo Domingo, Dominican Republic
| | - Agustín Garzón Carbonell
- National Center for Applied Electromagnetism (CNEA), Universidad de Oriente CP 90500, Santiago de Cuba, Cuba
| | | | - Alcibíades Lara Lafargue
- National Center for Applied Electromagnetism (CNEA), Universidad de Oriente CP 90500, Santiago de Cuba, Cuba
| | - Héctor Manuel Camué Ciria
- National Center for Applied Electromagnetism (CNEA), Universidad de Oriente CP 90500, Santiago de Cuba, Cuba
| | - Yohandys A Zulueta
- Departamento de Física, Facultad de Ciencias Naturales y Exactas, Universidad de Oriente, Santiago de Cuba, 90500, CP, Cuba.
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Luna TB, Bello JLG, Carbonell AG, Montoya ADLCR, Lafargue AL, Ciria HMC, Zulueta YA. The role of various physiological and bioelectrical parameters for estimating the weight status in infants and juveniles cohort from the Southern Cuba region: a machine learning study. BMC Pediatr 2024; 24:313. [PMID: 38711132 DOI: 10.1186/s12887-024-04789-w] [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: 02/18/2024] [Accepted: 04/24/2024] [Indexed: 05/08/2024] Open
Abstract
OBJECTIVE The search for other indicators to assess the weight status of individuals is important as it may provide more accurate information and assist in personalized medicine.This work is aimed to develop a machine learning predictions of weigh status derived from bioimpedance measurements and other physical parameters of healthy infant juvenile cohort from the Southern Cuba Region, Santiago de Cuba. METHODS The volunteers were selected between 2002 and 2008, ranging in age between 2 and 18 years old. In total, 393 female and male infant and juvenile individuals are studied. The bioimpedance parameters are obtained by measuring standard tetrapolar whole-body configuration. A classification model are performed, followed by a prediction of other bioparameters influencing the weight status. RESULTS The results obtained from the classification model indicate that fat-free mass, reactance, and corrected resistance primarily influence the weight status of the studied population. Specifically, the regression model demonstrates that other bioparameters derived from impedance measurements can be highly accurate in estimating weight status. CONCLUSION The classification and regression predictive models developed in this work are of the great importance for accessing to the weigh status with high accuracy of younger individuals at the Oncological Hospital in Santiago de Cuba, Cuba.
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Affiliation(s)
- Taira Batista Luna
- Autonomous University of Santo Domingo (UASD), UASD Nagua Center, Santo Domingo, Dominican Republic.
| | - Jose Luis García Bello
- Autonomous University of Santo Domingo (UASD), San Francisco de Macorís Campus, Santo Domingo, Dominican Republic
| | - Agustín Garzón Carbonell
- National Center for Applied Electromagnetism (CNEA), Universidad de Oriente CP 90500, Santiago de Cuba, Cuba
| | | | - Alcibíades Lara Lafargue
- National Center for Applied Electromagnetism (CNEA), Universidad de Oriente CP 90500, Santiago de Cuba, Cuba
| | - Héctor Manuel Camué Ciria
- National Center for Applied Electromagnetism (CNEA), Universidad de Oriente CP 90500, Santiago de Cuba, Cuba
| | - Yohandys A Zulueta
- Departamento de Física, Facultad de Ciencias Naturales y Exactas, Universidad de Oriente, Santiago de Cuba, CP 90500, CP, Cuba.
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Pedro da Costa Pereira J, Santana Costa JH, Gomes de Miranda BL, de Sousa Rebouças A, Denise de Lima Bezerra A, Gomes Dantas Lopes MM, Trussardi Fayh AP. Prognostic value of overhydration and bioelectrical impedance vector on short- and long-term outcomes in hospitalized patients with cancer. Clin Nutr 2024; 43:756-764. [PMID: 38335800 DOI: 10.1016/j.clnu.2024.01.025] [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: 11/28/2023] [Revised: 01/03/2024] [Accepted: 01/19/2024] [Indexed: 02/12/2024]
Abstract
BACKGROUND & AIMS Water, an essential component of body composition, appears to be a significant predictor of adverse outcomes in clinical populations, despite being frequently underexplored. Bioelectrical impedance analysis (BIA) and vector analysis (BIVA) are easy and cost-effective bedside tools for estimating body composition, particularly water content. Therefore, our study aimed to assess the impact of hydration and fluid status using both BIA and BIVA on outcomes in hospitalized patients with cancer. METHODS A prospective cohort study involving hospitalized individuals with cancer was conducted. Total body water (TBW) was estimated using BIA. Extracellular-water/TBW (ECW/TBW) and ECW/intracellular-water (ECW/ICW) ratios were calculated. BIVA ellipses vectors were constructed to enhance our analysis of hydration status. Participants were followed during their hospital stay and up to six months after discharge to assess outcomes, including in-hospital mortality, 6-month non-elective rehospitalization, and 6-month mortality. RESULTS TBW, ECW/TBW, ECW/ICW ratios, and BIVA plots were not associated with non-elective rehospitalization during the follow-up period. However, TBW and an elevated ECW/ICW ratio were independent predictors of in-hospital mortality [hazard ratio (HR): 1.07 (1.01; 1.13) p = 0.020; HR: 4.23 (1.69; 10.58) p = 0.002]. Elevated ratios ECW/TBW and ECW/ICW were independent predictors of 6-month mortality [HR: 1.87 (1.10; 3.21) p = 0.022; HR: 2.49 (1.37; 4.51) p = 0.003]. BIVA vectors for in-hospital and 6-month mortality shifted significantly to the right, leading to cachexia and overhydration quadrants (p < 0.05). CONCLUSION Abnormalities related to overhydration were important predictors of short- and long-term mortality in hospitalized patients with cancer.
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Affiliation(s)
- Jarson Pedro da Costa Pereira
- Postgraduate Program in Nutrition and Public Health, Department of Nutrition, Federal University of Pernambuco, Recife, PE, Brazil
| | | | - Bruna Luisa Gomes de Miranda
- Postgraduate Program in Nutrition, Health Science Center, Federal University of Rio Grande do Norte, Natal, RN, Brazil
| | - Amanda de Sousa Rebouças
- Postgraduate Program in Health Science, Health Science Center, Federal University of Rio Grande do Norte, Natal, RN, Brazil
| | - Agnes Denise de Lima Bezerra
- Postgraduate Program in Health Science, Health Science Center, Federal University of Rio Grande do Norte, Natal, RN, Brazil
| | - Márcia Marília Gomes Dantas Lopes
- Department of Nutrition, Federal University of Rio Grande do Norte, Natal, RN, Brazil; Postgraduate Program in Applied Sciences to Women's Health, Health Sciences Center, Federal University of Rio Grande do Norte, Natal, Brazil
| | - Ana Paula Trussardi Fayh
- Department of Nutrition, Federal University of Rio Grande do Norte, Natal, RN, Brazil; Postgraduate Program in Nutrition, Health Science Center, Federal University of Rio Grande do Norte, Natal, RN, Brazil; Postgraduate Program in Health Science, Health Science Center, Federal University of Rio Grande do Norte, Natal, RN, Brazil; PesqClin Lab, Onofre Lopes University Hospital, Brazilian Company of Hospital Services (EBSERH), Federal University of Rio Grande do Norte, Natal, Brazil.
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Sasmita BR, Zhao Y, Gong M, Luo S, Huang B. Edema Index Predicts Mortality in Patients with Chronic Heart Failure: A Prospective, Observational Study. Glob Heart 2024; 19:5. [PMID: 38250704 PMCID: PMC10798169 DOI: 10.5334/gh.1287] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2023] [Accepted: 12/18/2023] [Indexed: 01/23/2024] Open
Abstract
Introduction Chronic fluid accumulation or congestion is considered an important pathophysiologic mechanism in heart failure, leading to cardinal symptoms such as dyspnea, pulmonary congestion, and pitting edema. Edema index (EI) recently emerged as a surrogate for extracellular volume status and has been proven to be able to reflect one's congestion status. In this study, we aimed to evaluate the prognostic value of EI in patients with chronic heart failure (CHF). Methods A total of 401 consecutive patients with CHF between August 2019 and October 2021 were prospectively enrolled. EI was obtained by InBody S10. The primary endpoint was long-term all-cause and cardiovascular mortality. Results Patients with high EI (>0.397) tended to be older, presented with atrial fibrillation, have higher N-terminal brain natriuretic peptide, and have higher creatinine (all p < 0.05). During a median follow-up of 1200 days, the all-cause and cardiovascular mortality rate was significantly higher in the high EI group compared to the low EI group (all-cause mortality rate 43.8% vs. 30.3%, p < 0.001, and cardiovascular mortality rate 17.5% vs. 13.0%, p < 0.001, respectively). In the multivariate Cox proportional hazard analysis, EI > 0.397 was an independent predictor for both all-cause mortality (HR 1.959; 95% CI 1.304, 2.944; p = 0.001) and cardiovascular mortality (HR 2.051; 95% CI 1.276, 3.296; p = 0.003). Conclusions Admission EI could be used as a marker for predicting long-term mortality in patients with CHF, and higher EI was associated with an increased risk of all-cause and cardiovascular mortality. Furthermore, EI-guided management could be a promising therapy in patients with CHF.
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Affiliation(s)
- Bryan Richard Sasmita
- Department of Cardiology, the First Affiliated Hospital of Chongqing Medical University, 400016, Chongqing, China
| | - Yuhe Zhao
- Department of Cardiology, the First Affiliated Hospital of Chongqing Medical University, 400016, Chongqing, China
- Department of Cardiology, Chongqing Seventh People’s Hospital, Chongqing, China
| | - Ming Gong
- Department of Cardiology, the First Affiliated Hospital of Chongqing Medical University, 400016, Chongqing, China
| | - Suxin Luo
- Department of Cardiology, the First Affiliated Hospital of Chongqing Medical University, 400016, Chongqing, China
| | - Bi Huang
- Department of Cardiology, the First Affiliated Hospital of Chongqing Medical University, 400016, Chongqing, China
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Inami T, Yamaguchi S, Nishioka T, Chida K, Hoshina K, Ito O, Hashimoto T, Murayama M. The Effect of Contrast Water Therapy on Dehydration during Endurance Training Camps in Moderate-Altitude Environments. Sports (Basel) 2023; 11:232. [PMID: 38133099 PMCID: PMC10747241 DOI: 10.3390/sports11120232] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2023] [Revised: 11/03/2023] [Accepted: 11/20/2023] [Indexed: 12/23/2023] Open
Abstract
The effects of contrast water therapy (CWT) on dehydration at moderate altitudes during training camps remain unknown. We hypothesized that CWT reduces dehydration resulting from training at moderate altitudes and improves performance, akin to conditions at sea level. A 13-day endurance training camp was held at a moderate altitude of 1100 m and included 22 university athletes, who were divided into two groups (CWT group, n = 12; control (CON) group, n = 10). The sample size was calculated based on an α level of 0.05, power (1 β) of 0.8, and effect size of 0.25 based on two-way ANOVA. Longitudinal changes over 13 days were compared using a two-group comparison model. Additionally, 16 athletes participated in an additional performance verification analysis. Subjective fatigue, body mass, and water content (total body water (TBW), extracellular water (ECW), and intracellular water) were measured using bioimpedance analysis every morning, and the titin N-terminal fragment in urine (UTF) was measured as an index of muscle damage. For performance verification, 10 consecutive jump performances (with the reactive strength index (RSI) as an indicator) were evaluated as neuromuscular function indices. The results indicated that the UTF did not significantly differ between the two groups. Moreover, the ECW/TBW values, indicative of dehydration, on days 4 and 5 in the CWT group were significantly lower than those in the CON group. However, there was no significant difference in RSI between the two groups. Therefore, although CWT reduces dehydration in the early stages of the training camp, it may not affect performance.
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Affiliation(s)
- Takayuki Inami
- Institute of Physical Education, Keio University, 4-1-1, Hiyoshi, Yokohama 223-8521, Japan
| | - Shota Yamaguchi
- Institute of Physical Education, Keio University, 4-1-1, Hiyoshi, Yokohama 223-8521, Japan
| | - Takuya Nishioka
- Institute of Physical Education, Keio University, 4-1-1, Hiyoshi, Yokohama 223-8521, Japan
| | - Kenta Chida
- Graduate School of System Design, Management, Keio University, 4-1-1, Hiyoshi, Yokohama 223-8521, Japan
| | - Kosaku Hoshina
- Graduate School of Media and Governance, Keio University, 5322, Fujisawa 252-0883, Japan
| | - Osamu Ito
- Sports Medicine Research Center, Keio University, 4-1-1, Hiyoshi, Yokohama 223-8521, Japan
- FOCS Inc., 1-3-47, Nakahara-Ward, Kawasaki 211-0025, Japan
| | - Takeshi Hashimoto
- Sports Medicine Research Center, Keio University, 4-1-1, Hiyoshi, Yokohama 223-8521, Japan
| | - Mitsuyoshi Murayama
- Institute of Physical Education, Keio University, 4-1-1, Hiyoshi, Yokohama 223-8521, Japan
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