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Not just about weight: Identifying hidden nutritional vulnerability after radical cystectomy 不只是体重:根治性膀胱切除术后发现隐藏的营养脆弱性。
IF 3.3 3区 医学 Q2 NUTRITION & DIETETICS Pub Date : 2025-12-10 DOI: 10.1038/s41430-025-01694-y
Jakob Højgaard Hundebøll, Alberte Fisker Olesen, Irene Wessel, Faidon Magkos, Alicia Martin Poulsen, Ane Rytter
Patients undergoing radical cystectomy face substantial nutritional challenges, yet dietary intake patterns and their adequacy remain poorly defined. In this prospective observational study of 25 ERAS-managed patients, energy and protein adequacy was low during the first postoperative week, while body weight remained stable – likely influenced by fluid retention. Significant weight loss emerged by day 14 (–2.3%; p < 0.001), which increased by day 30 (–5.3%; p < 0.001), despite dietetic follow-up and improvements in dietary intake. Patients requiring nasogastric decompression experienced greater weight loss than those without (–7.2% vs. –3.9%; p = 0.004), suggesting an association with nutritional deterioration. We conclude that early weight trajectory alone may not be a good indicator of nutritional status. Evaluating dietary intake, nutritional symptoms, and body composition including fluid balance is likely required for optimal clinical decision-making. This underscores the importance of individualized, symptom-responsive strategies, including consideration of supplemental nutrition in patients with persistent intolerance.
接受根治性膀胱切除术的患者面临着巨大的营养挑战,但饮食摄入模式及其是否充足仍不明确。在这项前瞻性观察研究中,25例eras管理的患者在术后第一周的能量和蛋白质充足性较低,而体重保持稳定-可能受到液体潴留的影响。第14天体重明显减轻(-2.3%;p
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引用次数: 0
Meal composition and nutrient intake in hospitalized adults: the role of relative energy and protein content 住院成人膳食组成和营养摄入:相对能量和蛋白质含量的作用
IF 3.3 3区 医学 Q2 NUTRITION & DIETETICS Pub Date : 2025-12-09 DOI: 10.1038/s41430-025-01689-9
Jakob Højgaard Hundebøll, Irene Wessel, Faidon Magkos, Nikoline Sofie Sjøberg, Nicoline Groth, Ane Rytter
Inadequate oral intake among hospitalized adults contributes to malnutrition and adverse outcomes. While guidelines advocate meals with higher energy and protein content, how meal composition relates to intake under routine conditions is unclear. In this cross-sectional study, 392 lunch and dinner meals were recorded across six departments at a tertiary hospital. Intake was measured by weighing food before and after consumption, and nutrient content was derived from standardized recipes and food composition tables. Meals were stratified by relative energy and protein content (per 100 g food), categorized as above or below the median. Associations between meal composition and intake outcomes were analyzed using non-parametric tests (Mann–Whitney U and Kruskal–Wallis). Median consumption was 205 g [IQR: 119–286], providing 250 kcal [137–385] and 10.0 g [5.8–15.6] of protein per meal. Meals above the median for relative energy content were associated with higher energy (+117 kcal; p < 0.001) and protein intake (+3.6 g; p < 0.001) compared with meals below the median, with no difference in food weight. Meals above the median for relative protein content provided +4.9 g more protein (p < 0.001) despite a 23 g reduction in weight (p = 0.007). Hospitalized patients consume modest energy and protein. Higher relative energy and protein content of foods was associated with greater intake despite similar or smaller portions. These findings support targeted meal-composition strategies focusing on energy and protein enrichment.
背景/目的:住院成人口服摄入不足会导致营养不良和不良后果。虽然指南提倡能量和蛋白质含量较高的膳食,但在日常情况下,膳食成分与摄入量的关系尚不清楚。对象/方法:在本横断面研究中,记录了一家三级医院六个科室的392顿午餐和晚餐。摄取量是通过称量食物食用前后的重量来测量的,营养成分是通过标准化食谱和食物成分表得出的。膳食按相对能量和蛋白质含量(每100克食物)分层,分为高于或低于中位数。使用非参数检验(Mann-Whitney U和Kruskal-Wallis)分析膳食成分与摄入结果之间的关系。结果:平均摄入量为205克[IQR: 119-286],每餐提供250千卡[137-385]和10.0克[5.8-15.6]蛋白质。相对能量含量高于中位数的膳食与较高的能量相关(+117 kcal); p结论:住院患者消耗适度的能量和蛋白质。相对能量和蛋白质含量较高的食物与更大的摄入量相关,尽管份量相似或较小。这些发现支持了以能量和蛋白质富集为重点的针对性膳食组成策略。
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引用次数: 0
Herbal galactagogues to improve breastmilk production and lactation in mothers of preterm babies: a systematic review of clinical trials 草药催乳剂改善早产儿母亲的母乳分泌和泌乳:临床试验的系统回顾。
IF 3.3 3区 医学 Q2 NUTRITION & DIETETICS Pub Date : 2025-12-05 DOI: 10.1038/s41430-025-01679-x
Aislinn Cragg, Ilana Levene, Sharram Darabi, Merlin Willcox
Premature infants suffer from conditions such as necrotising enterocolitis and sepsis, whose risk is reduced by breastmilk. Rates of breastfeeding are lower in premature infants compared to term infants. Insufficient breastmilk is the most commonly cited reason for breastfeeding termination. Herbal medicines are commonly used for promoting breastmilk production, but their safety and efficacy are unclear. We wanted to assess whether specific herbal galactagogues can safely and effectively increase lactation in mothers who delivered prematurely. Six databases were searched (Medline, Embase, CINAHL, AMED, COCHRANE library, ProQuest Dissertations and Theses Global) with no language or date restrictions. We included randomised controlled trials (RCTs) of herbal galactagogue use in preterm infant mothers. Ten RCTs were included, each investigating a different galactagogue or mixture. Two scored ‘high’ for risk of bias, the remainder scored ‘some concerns’. There was low certainty evidence of an increase in milk volumes by day 7 of the intervention period with barley malt and lemon balm (mean difference 149 ml, 95% CI: 38–260); silymarin in combination with phosphatidylserine and Galega (mean difference 105 ml, 95% CI: 27–183); Pimpinella anisum seed tea (mean difference 98 ml, 95% CI: 63–133); and Latuca sativa (lettuce) syrup (mean difference 82 ml, 95% CI: 60–105). There is a lack of high-quality RCTs on herbal galactagogues within the preterm population. There is low certainty evidence that Barley malt with lemon balm, silymarin phytosomes with Galega, Pimpinella anisum seed tea, Moringa oleifera leaf capsules and Latuca sativa (lettuce) syrup increase breastmilk production. Higher-quality trials are needed to confirm this effect.
早产儿患有坏死性小肠结肠炎和败血症等疾病,母乳可以降低这些疾病的风险。与足月婴儿相比,早产儿的母乳喂养率较低。母乳不足是终止母乳喂养最常见的原因。草药通常用于促进母乳生产,但其安全性和有效性尚不清楚。我们想评估特定的草药催乳剂是否可以安全有效地增加早产母亲的泌乳量。检索了6个数据库(Medline, Embase, CINAHL, AMED, COCHRANE library, ProQuest Dissertations和Theses Global),没有语言和日期限制。我们纳入了草药催乳剂用于早产儿母亲的随机对照试验(rct)。纳入10项随机对照试验,每项试验研究不同的催乳剂或混合物。其中两个人的偏见风险得分为“高”,其余的人得分为“一些担忧”。有低确定性证据表明,大麦芽和柠檬香蜂草干预期第7天牛奶量增加(平均差149毫升,95% CI: 38-260);水飞蓟素联合磷脂酰丝氨酸和甘露甘氨酸(平均差105 ml, 95% CI: 27-183);茴香籽茶(平均差98 ml, 95% CI: 63-133);和Latuca sativa(生菜)糖浆(平均差82 ml, 95% CI: 60-105)。在早产人群中缺乏关于草药催乳剂的高质量随机对照试验。有不太确定的证据表明,含有柠檬香蜂草的大麦芽、含有Galega的水飞蓟素磷脂体、茴香籽茶、辣木叶胶囊和莴苣糖浆可以增加母乳产量。需要更高质量的试验来证实这一效果。
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引用次数: 0
Screening for reduced food intake in 2 minutes: validation of the ingesta verbal analogue scale in medical geriatric oncology 2分钟内减少食物摄入的筛查:医学老年肿瘤学中摄取言语模拟量表的验证。
IF 3.3 3区 医学 Q2 NUTRITION & DIETETICS Pub Date : 2025-12-05 DOI: 10.1038/s41430-025-01681-3
Pierre Senesse, Julie Deffrennes, Nicolas Flori, Chloé Janiszewski, Laure Francioni, Simon Thezenas, Estelle Guerdoux
Reduced food intake is a key aetiological factor of malnutrition. The study purpose was to validate the ingesta Verbal Analogue Scale (ingesta-VAS), a promising tool for rapid food intake assessment, in older adults with cancer in whom malnutrition is frequent and affects treatment outcomes and survival. This prospective study focused on ≥70-year-old patients with a diet history undergoing their first oncological treatment at a French cancer centre. Exclusion criteria included surgery, oral intake cessation, or artificial nutrition use. Dietitians evaluated nutritional status, daily energy intake, and used the ingesta-VAS and Mini-Nutritional Assessment-Short Form (MNA-SF). The ingesta-VAS validity, sensitivity, specificity, and prognostic impact were assessed using daily food intake as primary criterion, then <25 kcal/kg/day as reference standard for inadequate energy intake. The Area Under the Curve was used to select the cut-off. Overall survival was assessed with the Kaplan-Meier analysis. The analysis involved 441 participants. The correlation between ingesta-VAS scores and energy intake was strong ( $$rho$$  = 0.71), and moderate with the MNA-SF scores ( $$rho$$  = 0.55, p < .001). Its sensitivity and specificity for detecting inadequate energy intake was 79.0% and 72.6%, respectively. Combined with performance status and body mass index, ingesta-VAS significantly predicted the inadequate energy intake (odds ratio: 10.2, p < 0.001). Difference in overall survival groups was significant with the cut-off of ≤7 [HR = 1.60 (95% CI: 1.29–1.98), p < 0.001]. The ingesta-VAS exhibits reliable metrological properties and may serve as an early, non-invasive, and simple tool to screen reduced food intake in older adults with cancer for detecting the risk of malnutrition.
背景/目的:食物摄入减少是营养不良的一个关键病因。研究目的是验证摄取言语模拟量表(ingsta - vas),这是一种有前景的快速食物摄入评估工具,用于经常营养不良并影响治疗结果和生存的老年癌症患者。对象/方法:这项前瞻性研究集中在≥70岁的有饮食史的患者,他们在法国癌症中心接受了第一次肿瘤治疗。排除标准包括手术、停止口服或使用人工营养。营养师评估营养状况,每日能量摄入,并使用摄入vas和mini - nutrition Assessment-Short Form (MNA-SF)。以每日食物摄入量为主要标准评估摄取- vas效度、敏感性、特异性和预后影响。结果:该分析涉及441名参与者。摄取- vas评分与能量摄入之间的相关性很强(ρ = 0.71),与MNA-SF评分之间的相关性中等(ρ = 0.55, p)。结论:摄取- vas具有可靠的计量特性,可以作为早期、无创、简单的工具,用于筛查老年癌症患者食物摄入量减少,以检测营养不良的风险。
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引用次数: 0
A combined MeDi-DASH-CHH dietary intervention improves lipid profiles and enhances dietary adherence in northern Chinese older adults with dyslipidemia: A randomized controlled trial 一项随机对照试验:联合medium - dash - chh饮食干预可改善中国北方老年血脂异常患者的脂质谱并增强饮食依从性。
IF 3.3 3区 医学 Q2 NUTRITION & DIETETICS Pub Date : 2025-12-02 DOI: 10.1038/s41430-025-01687-x
Tongyang Wu, Liyang Zhang, Haoran Yu, Xukun Chen, Li Huang, Qi Wu, Jingwen Zhang, Yue Wang, Changqing Sun, Guowei Huang, Wen Li
Dietary patterns targeting cardiometabolic health, such as the Mediterranean diet, DASH diet, and the Chinese Healthy Heart (CHH) dietary pattern have demonstrated lipid-lowering effects, yet culturally adapted strategies for older adults in northern China remain understudied. This study developed a combined MeDi-DASH-CHH dietary pattern by integrating key components of Western evidence-based diets (Mediterranean and DASH) with local dietary preferences (e.g., whole grain consumption, seasonal vegetable intake) to evaluate its impact on blood lipid control in northern Chinese older adults with dyslipidemia. A total of 210 dyslipidemic adults aged 60–75 years were stratified by sex, then randomized (1:1) to a 6-month intervention group (MeDi-DASH-CHH diet, with emphasized intake of aquatic products, dairy, and whole grains) or a control group (conventional guidance per Dietary Guidelines for Chinese Residents (2024)). Both groups received monthly follow-up visits. The primary outcome was the changes from baseline to six months in lipoprotein cholesterol (LDL-C). Secondary outcomes included changes in total cholesterol (TC), triglycerides (TG), high-density lipoprotein cholesterol (HDL-C), dietary intake, and body composition indicators. After intervention, the intervention group showed improvements in lipid profiles compared to the control group (all P < 0.05). Dietary intake indicated increased consumption of whole grains, potatoes, vegetables, fruits, aquatic products, dairy products, and nuts, alongside reduced intake of livestock meat, poultry meat, and egg intake. The combined MeDi-DASH-CHH dietary effectively improves lipid profiles and promotes healthier eating behaviors in older adults with dyslipidemia in northern China.
背景:针对心脏代谢健康的饮食模式,如地中海饮食、DASH饮食和中国健康心脏(CHH)饮食模式已显示出降脂效果,但中国北方老年人的文化适应策略仍未得到充分研究。本研究通过将西方循证饮食(地中海和DASH)的关键组成部分与当地饮食偏好(如全谷物消费、季节性蔬菜摄入)相结合,开发了一种mid -DASH- chh组合饮食模式,以评估其对中国北方血脂异常老年人血脂控制的影响。方法:将210名60-75岁的血脂异常成年人按性别分层,然后随机(1:1)分为6个月干预组(mid - dash - chh饮食,强调水产品、乳制品和全谷物的摄入)和对照组(按照《中国居民膳食指南(2024)》进行常规指导)。两组患者每月都接受随访。主要结局是从基线到6个月脂蛋白胆固醇(LDL-C)的变化。次要结局包括总胆固醇(TC)、甘油三酯(TG)、高密度脂蛋白胆固醇(HDL-C)、饮食摄入量和身体成分指标的变化。结果:干预组与对照组相比,干预组的血脂水平有所改善(均P)。结论:中西医结合饮食可有效改善中国北方地区老年血脂异常患者的血脂水平,促进更健康的饮食行为。
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引用次数: 0
Disturbed homeostasis of iron metabolism in children from marginalised Roma communities 边缘化罗姆社区儿童铁代谢紊乱的体内平衡
IF 3.3 3区 医学 Q2 NUTRITION & DIETETICS Pub Date : 2025-12-02 DOI: 10.1038/s41430-025-01686-y
Beáta Hubková, Jana Mašlanková, Ivana Večurkovská, Anna Birková, Beáta Čižmárová, Martina Zavacká, Daniela Fiľakovská Bobáková
The purpose of this study was to compare selected iron markers (serum iron, total iron-binding capacity (TIBC), transferrin and ferritin concentration, transferrin saturation, and free haemoglobin) in children from marginalised Roma communities (MRCs) with children from the majority population and explore their associations with diet composition. We obtained cross-sectional data (questionnaires, blood samples from children) from 119 mother-child dyads from MRCs and the majority population. Group differences were tested using Chi-square and Mann–Whitney U tests. Associations of belonging to MRCs and diet with iron markers (transferrin, ferritin, TIBC, serum iron, transferrin saturation) were examined using bootstrapped linear regression models, and mediation analyses assessed whether eating habits mediated group differences. Statistically significant differences between children from MRCs, and the majority were found in serum transferrin, ferritin, and TIBC levels. The more frequent consumption of sweetened drinks, sweets, and salty snacks is associated with lower levels of transferrin, and more frequent consumption of dairy products is associated with higher levels of total iron-binding capacity. Current breastfeeding was found to be negatively associated with ferritin. Consumption of sweets and salty snacks partially mediates the differences in transferrin between children from MRCs and the majority. Our findings suggest that the observed low ferritin levels, elevated TIBC, and reduced transferrin saturation in Roma children are likely indicative of early-stage iron deficiency, potentially driven by underlying malnutrition. This study underscores the significant disparities in iron metabolism between children from MRCs and those from the majority population, primarily driven by social determinants of health, including diet composition.
目的:本研究的目的是比较边缘化罗姆社区(MRCs)儿童与大多数人群儿童的选定铁标志物(血清铁、总铁结合能力(TIBC)、转铁蛋白和铁蛋白浓度、转铁蛋白饱和度和游离血红蛋白),并探讨其与饮食组成的关系。方法:我们获得了来自MRCs和大多数人群的119对母子的横断面数据(问卷调查,儿童血液样本)。组间差异采用卡方检验和Mann-Whitney U检验。使用自举线性回归模型检验了MRCs所属和饮食与铁标志物(转铁蛋白、铁蛋白、TIBC、血清铁、转铁蛋白饱和度)的关联,并通过中介分析评估了饮食习惯是否介导了组间差异。结果:MRCs患儿之间的差异有统计学意义,主要是血清转铁蛋白、铁蛋白和TIBC水平。越频繁地食用含糖饮料、甜食和含盐零食,转铁蛋白水平就越低,而越频繁地食用乳制品,总铁结合能力就越高。目前发现母乳喂养与铁蛋白呈负相关。甜食和含盐零食的摄入在一定程度上介导了MRCs儿童和大多数儿童之间转铁蛋白的差异。结论:我们的研究结果表明,罗姆儿童中观察到的低铁蛋白水平、升高的TIBC和降低的转铁蛋白饱和度可能表明早期缺铁,可能是由潜在的营养不良引起的。这项研究强调了MRCs儿童与大多数人群儿童在铁代谢方面的显著差异,主要是由健康的社会决定因素驱动的,包括饮食组成。
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引用次数: 0
Early prediction of enteral nutrition feeding intolerance risk in neurocritical patients and development of a simplified risk scoring tables 神经危重症患者肠内营养喂养不耐受风险的早期预测及简化风险评分表的制定。
IF 3.3 3区 医学 Q2 NUTRITION & DIETETICS Pub Date : 2025-12-01 DOI: 10.1038/s41430-025-01683-1
Rong Yuan, Lei Liu, Jiao Mi, Xue Li, Fang Yang, Shifang Mao
This study collected and analyzed clinical data on enteral nutrition therapy in neurocritical patients, developed and validated a risk prediction model for feeding intolerance (FI), and transformed the model into a visual risk scoring tool,provide a reference for clinical staff to screen for people at high risk of enteral nutrition feeding intolerance in neurocritically ill patients. Using prospective study,440 eligible inpatients from a Chinese tertiary hospital (April–December 2022) were divided into derivation (70%) and validation (30%) cohorts.Univariate and binary logistic regression analyses were conducted to construct the FI prediction model, and a simplified risk assessment scale for FI in the neurological intensive care unit (NCU) was developed. FI incidence was 71.0% (213/300) in the derivation cohort. Independent risk factors included age, Glasgow Coma Scale (GCS) score, APACHE II score, mechanical ventilation, nasogastric tube feeding, hyperglycemia, and hypoalbuminemia (P < 0.05). The model showed excellent discrimination (AUC = 0.941, 95% CI:0.912–0.970) and calibration (Hosmer–Lemeshow P = 0.293), with 85.9% sensitivity and 90.8% specificity. In the validation cohort (140 patients, FI incidence was 72.1%), predictive accuracy was 82.9% (AUC = 0.924, 95% CI:0.878–0.970; sensitivity=96.0%, specificity=74.4%). The visual scoring tool achieved 84.3% accuracy (Kappa=0.700, P < 0.001), aligning with the original model. The early enteral nutrition FI risk prediction model and corresponding scoring table developed in this study showed good predictive performance and could serve as a useful reference for the clinical assessment of FI risk in neurocritical patients.
背景:本研究收集并分析神经危重症患者肠内营养治疗的临床资料,建立并验证了进食不耐受(FI)风险预测模型,并将该模型转化为视觉风险评分工具,为临床工作人员筛选神经危重症患者肠内营养进食不耐受高危人群提供参考。方法:采用前瞻性研究方法,将国内某三级医院440例符合条件的住院患者(2022年4月- 12月)分为衍生组(70%)和验证组(30%)。通过单变量和二元logistic回归分析构建FI预测模型,并制定神经重症监护病房(NCU) FI简化风险评估量表。结果:衍生队列中FI发生率为71.0%(213/300)。独立危险因素包括年龄、格拉斯哥昏迷量表(GCS)评分、APACHEⅱ评分、机械通气、鼻胃管喂养、高血糖、低白蛋白血症(P)。结论:本研究建立的早期肠内营养FI风险预测模型及相应的评分表具有较好的预测效果,可为临床评估神经危重症患者FI风险提供有益参考。
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引用次数: 0
Iron status in women of reproductive age in Switzerland: the role of inflammation and ferritin thresholds for the prevalence of iron deficiency–a cross-sectional study 瑞士育龄妇女的铁状态:炎症和铁蛋白阈值对铁缺乏患病率的作用-一项横断面研究。
IF 3.3 3区 医学 Q2 NUTRITION & DIETETICS Pub Date : 2025-11-28 DOI: 10.1038/s41430-025-01685-z
Isabelle Herter-Aeberli, Maria Andersson, Valeria Galetti
Iron deficiency in women of childbearing age remains a public health challenge, but prevalence data in high-income countries is scarce and the role of predictors remains uncertain. We determined the prevalence of iron deficiency in women in Switzerland and assessed the influence of BMI, inflammation, and age on iron status. In addition, we determined the ferritin concentration below which hemoglobin (Hb) starts to decline. This is a secondary, pooled data analysis including data from 26 studies conducted in Switzerland between 2009 and 2020. Participants were a convenience sample of generally healthy women aged between 18 and 54 years (n = 2709). The prevalence of iron deficiency in women (median 23.3 years; IQR: 21.1–26.4) was 18.9%, while 4.7% of the women were anemic and 3.3% were iron deficient anemic. The prevalence of overweight (BMI ≥ 25 kg/m2) was 7.2%, and 1.4% were obese (BMI ≥ 30 kg/m2); 8.9% suffered from acute inflammation (CRP ≥ 5 mg/l). In multivariate regression analysis, BMI and age were positive predictors of ferritin (p < 0.001), while inflammation was not. Correcting iron status for inflammation had a negligible effect on the prevalence of iron deficiency. We observed a decrease in Hb below a ferritin concentration of 28.5 µg/l. In this convenience sample of young women in Switzerland, one in five was iron deficient and one in 30 was anemic due to iron deficiency. Controlling ferritin concentrations for inflammation did not substantially affect the prevalence of iron deficiency, indicating that such corrections are redundant in a healthy population with a low prevalence of inflammation. Impaired erythropoiesis was observed when the ferritin concentration fell below 28.5 µg/l, providing further evidence for a physiologically based ferritin threshold to identify the onset of iron-deficient erythropoiesis.
背景/目的:育龄妇女缺铁仍然是一项公共卫生挑战,但高收入国家的流行率数据很少,预测因素的作用仍然不确定。我们确定了瑞士女性缺铁的患病率,并评估了BMI、炎症和年龄对铁状态的影响。此外,我们确定了铁蛋白浓度低于血红蛋白(Hb)开始下降。研究对象/方法:这是一项二级汇总数据分析,包括2009年至2020年在瑞士进行的26项研究的数据。参与者是年龄在18至54岁之间的一般健康女性的方便样本(n = 2709)。结果:女性缺铁患病率(中位23.3岁;IQR: 21.1-26.4)为18.9%,其中4.7%的女性贫血,3.3%为缺铁性贫血。超重(BMI≥25 kg/m2)患病率为7.2%,肥胖(BMI≥30 kg/m2)患病率为1.4%;8.9%发生急性炎症(CRP≥5 mg/l)。在多变量回归分析中,BMI和年龄是铁蛋白的积极预测因子(p)。结论:在瑞士的这个方便的年轻女性样本中,五分之一的人缺铁,三十分之一的人因缺铁而贫血。控制炎症的铁蛋白浓度并没有实质性地影响缺铁的患病率,这表明在炎症患病率低的健康人群中,这种校正是多余的。当铁蛋白浓度低于28.5µg/l时,观察到红细胞功能受损,这为铁蛋白生理学阈值提供了进一步的证据,以确定铁缺乏性红细胞的发病。
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引用次数: 0
Evaluation of an estimation equation for water turnover in male collegiate sprinters based on the doubly labeled water method 基于双标记水法的大学男子短跑运动员水分周转估算方程的评价。
IF 3.3 3区 医学 Q2 NUTRITION & DIETETICS Pub Date : 2025-11-26 DOI: 10.1038/s41430-025-01680-4
Yuki Shimamura, Yuki Ahagon, Mariko Ikai, Suraiya Khatun, Satoru Tanigawa, Daisuke Yamamoto, Miki Kosugi, Yasuki Higaki, Akiko Uchizawa, Hiroyuki Sagayama, Kaito Iwayama
Appropriate hydration is essential for track-and-field sprinters to optimize training and competition performance. A recently developed estimation equation evaluates water turnover (WT) based on body size, environmental, and lifestyle factors. However, the assumption in the estimation equation—which may imply that athletes feel thirstier and have greater voluntary water intake than non-athletes because of an attenuated thirst-suppressing response—may not be applicable to sprinters engaged in high-intensity training. This study aimed to validate the estimation equation for WT in sprinters. Twenty-four male collegiate sprinters participated in this study. The WT in participants was estimated and measured using the estimation equation (WTEstimated) and the doubly labeled water (DLW) method (WTMeasured), respectively. Additionally, the total training time was evaluated using activity record. Preformed water volume was calculated by subtracting metabolic water, respiratory water uptake, and transcutaneous water uptake from WTMeasured. WTEstimated (4.95 ± 0.39 L/day) was significantly higher than WTMeasured (4.42 ± 0.74 L/day) (d = 0.57, P < 0.05). Total training time was significantly correlated with preformed water volume (r = 0.55, P < 0.05), and preformed water volume was significantly correlated with the difference between WTEstimated and WTMeasured (P < 0.05). Our findings indicate that the estimation equation overestimated WT by approximately 500 mL/day in male collegiate sprinters. These results suggest that sprinters should carefully consider the discrepancy difference between estimated WT and WT measurand using DLW method when using the estimation equation for hydration management.
背景/目的:适当的补水是田径运动员优化训练和比赛表现的必要条件。最近开发的估算公式评估水周转量(WT)基于体型,环境和生活方式因素。然而,估计方程中的假设——这可能意味着运动员比非运动员感到更渴,并且由于口渴抑制反应减弱而有更多的自愿饮水——可能不适用于从事高强度训练的短跑运动员。本研究旨在验证短跑运动员WT的估计方程。材料/方法:选取24名男大学生短跑运动员为研究对象。分别使用估计方程(WTEstimated)和双标记水(DLW)方法(WTMeasured)估计和测量参与者的WT。此外,使用活动记录评估总训练时间。预成型水量通过从WTMeasured中减去代谢水、呼吸水摄取和经皮水摄取来计算。结果:WTEstimated(4.95±0.39 L/day)显著高于WTMeasured(4.42±0.74 L/day) (d = 0.57, P Estimated和WTMeasured (P))。结论:我们的研究结果表明,估计方程高估了男大学生短跑运动员约500 mL/day的WT。这些结果表明,短跑运动员在使用估计方程进行水分管理时,应仔细考虑使用DLW方法估计的WT与测量的WT之间的差异。
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引用次数: 0
Effectiveness of intermittent iron and high-dose vitamin A supplementation on hemoglobin, iron and vitamin A status of schoolchildren in southern Ethiopia: a randomized placebo controlled trial 间歇性补铁和大剂量维生素A对埃塞俄比亚南部学童血红蛋白、铁和维生素A状况的有效性:一项随机安慰剂对照试验
IF 3.3 3区 医学 Q2 NUTRITION & DIETETICS Pub Date : 2025-11-25 DOI: 10.1038/s41430-025-01678-y
Befikadu Tariku Gutema, Muluken Bekele Sorrie, Sifray Batire Belayneh, Eshetu Zerihun Tariku, Wanzahun Godana Boynito, Tadiwos Hailu Zewdie, Tsegaye Yohanes, Stefaan De Henauw, Bruno Levecke, Souheila Abbeddou
We assessed the effectiveness of weekly iron and semestrial high-dose vitamin A supplementation on hemoglobin (Hb) concentration, and iron and vitamin A status of schoolchildren in rural Ethiopia. Using a 2 × 2 factorial design, 504 schoolchildren aged 7–10 years were randomly assigned to one of the four arms: control placebo; high-dose vitamin A; iron; or iron and high-dose vitamin A. Semestrial 200,000 IU vitamin A and weekly 42 mg of iron supplement were provided for 11 months. At baseline and at endline, Hb and serum concentrations of ferritin (sF), soluble transferrin receptor (sTfR), and retinol-binding protein (RBP) were measured. Serum indicators were adjusted for inflammation indicators, while Hb was adjusted for village altitude. Total body iron was calculated from sTfR and sF concentrations using an established formula. At baseline, prevalence of anemia (Hb < 11.0 g/dL), iron deficiency (sTfR > 8.3 mg/L or sF < 15 μg/L), iron-deficiency anemia, and vitamin A deficiency (RBP < 0.7 μmol/L) were 27.8%, 21.7%, 6.3% and 12.2%, respectively. Both iron and vitamin A supplementation had no significant effect on Hb, sTfR, and RBP concentrations. Supplementing iron weekly significantly increased sF (6.86 μg/L, 95%CI: 1.67, 12.05) and total body iron (0.45 mg/Kg, 95%CI: 0.17, 0.74), while semestrial vitamin A supplementation had no significant effect on both sF and total body iron. Intermittent iron and vitamin A supplementation had no significant detectable effects on Hb, sTfR, and RBP concentrations of schoolchildren. Weekly iron supplementation improved sF concentrations. These findings suggest that providing iron and vitamin A supplements to populations where the extent of the deficiencies is not a major public health problem may not be beneficial.
目的:我们评估了每周铁和半期高剂量维生素A补充对埃塞俄比亚农村学童血红蛋白(Hb)浓度以及铁和维生素A状况的有效性。方法:采用2 × 2因子设计,504名7-10岁的学童随机分配到四组中的一组:对照组;高剂量维生素A;铁;在11个月的时间里,他们每周补充42毫克的铁和20万国际单位的维生素A。在基线和终点,测定血红蛋白和血清铁蛋白(sF)、可溶性转铁蛋白受体(sTfR)和视黄醇结合蛋白(RBP)的浓度。根据炎症指标调整血清指标,根据村庄海拔调整Hb。根据sTfR和sF浓度,使用既定公式计算体内总铁。结论:间歇性补充铁和维生素A对学童的Hb、sTfR和RBP浓度没有显著的可检测影响。每周补铁可提高sF浓度。这些发现表明,在铁和维生素A缺乏程度不构成重大公共健康问题的人群中,提供铁和维生素A补充剂可能没有好处。
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引用次数: 0
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European Journal of Clinical Nutrition
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