Results 21 to 30 of about 19,317 (124)
Ultrasound in Obstetrics &Gynecology, Volume 67, Issue 3, Page 272-282, March 2026.ABSTRACT Objective Complete hydatidiform mole and coexisting normal fetus (CHMCF) is a rare condition for which there is significant heterogeneity in diagnosis, counseling and management of complications. The objective of this study was to summarize the prevalence of clinical outcomes in reported cases of CHMCF.
N. Salmeri +8 more
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自发性高血压大鼠TGFβ1/ Smad7通路与心室纤维化的关系
Zhongshan Daxue xuebao. Yixue kexue ban, 2008 [目的]探讨自发性高血压大鼠心室纤维化过程中TGFβ1和其下游分子smad7蛋白的表达规律。[方法]雄性自发性高血压大鼠（SHR）14只随机分为2组，SHR 22周龄组和SHR 14周龄组，另14只WKY大鼠也分为WKY大鼠22周龄组和WKY大鼠14周龄组。在实验动物14周龄和22周龄时，分别测定血压、心室质量指数；以氯胺T法测定心肌羟脯氨酸的含量，免疫组化测定Ⅰ型和Ⅲ型胶原在心肌组织中的表达水平；RT-PCR和Western-blot测定心肌中TGFβ1和其下游分子smad7的表达。[结果 ...
高修仁 +5 more
doaj
Zhongguo shiyan zhenduanxue, 2021 目的探讨研究年龄相关性听力障碍发病情况及老年前期筛查的可行性。方法选取2017年4月至2020年4月间在新华医院崇明分院进行听力检测的300例受试者为研究对象,根据年龄分组:31-40岁组,60例;41-50岁组,132例;51-60岁组,70例;61-70岁组,27例;71-80岁组,8例;80岁以上组,3例,对受试者进行纯音听力测试,记录受试者听力正常、言语频率听阈正常但是高频音下降、言语频率纯音听阈情况。结果 31-40岁组听力听力受损率最低,为6.67%,随着受试者年龄增加,听力受损率逐渐增高 ...
周健
doaj
Ultrasound in Obstetrics &Gynecology, Volume 67, Issue 3, Page 376-384, March 2026.ABSTRACT Objective To investigate whether combining abnormal morphological features observed on ultrasound in live pregnancies that ended in a first‐trimester miscarriage can predict an abnormal karyotype. Methods This retrospective observational cohort study was conducted at the early‐pregnancy assessment unit at University College London Hospital ...
T. Setty +5 more
wiley +1 more source
Zhongguo shiyan zhenduanxue, 2011 目的探讨唐氏筛查在高龄孕妇产前诊断中的意义。方法有产前诊断指征的高龄孕妇899人,孕中期17-24周行羊膜腔穿刺,取羊水检查胎儿染色体。结果发现染色体异常6例在146例唐氏综合症筛查阳性（即孕妇血清甲胎蛋白（AFP）和游离性雌三醇（uE3）以及游离人绒毛膜促性腺激素（-βhCG）三联指标检测,将三联指标测定值输入唐氏综合征风险计算软件,以1/270为高危切割值,≥1/270确定为唐氏综合征筛查阳性）的高龄孕妇中,发现染色体异常6例唐氏综合征发生率为4.11%（6/146 ...
宋桂宁 +5 more
doaj
浙江大学学报. 医学版目的分析生物学衰老标志物表型年龄和表型年龄加速与心脏瓣膜病的关联性。方法从英国生物库2006—2010年纳入的人群中筛选符合纳排标准的研究对象。计算表型年龄和表型年龄加速，运用Cox多因素分析探究表型年龄和表型年龄加速是否是心脏瓣膜病的独立危险因素，并采用剔除缺失值和亚组分析的方法进行敏感性分析。通过受试者操作特征（ROC）曲线比较表型年龄、表型年龄加速对心脏瓣膜病的预测准确性，并绘制基于逻辑回归的临床决策曲线。结果本研究共纳入411 687名参与者，其中患有心脏瓣膜病14 258例（中位随访时间12 ...
刘 湘婧 +5 more
doaj +1 more source
Ultrasound in Obstetrics &Gynecology, Volume 67, Issue 1, Page 79-88, January 2026.ABSTRACT Objective To evaluate the proportion of optimal assessments of endometrial thickness (ET) achieved by transvaginal ultrasound (TVS) compared with a multimodal (MM) sonographic approach in women with abnormal uterine bleeding (AUB). Methods This prospective observational study was a subset of the EPI‐SURE study conducted between June and ...
S. Nijjar +5 more
wiley +1 more source
Deep quantile regression for growth and maturation reaction norms
Methods in Ecology and Evolution, Volume 17, Issue 1, Page 111-124, January 2026.Abstract Understanding species' growth and maturation responses to anthropogenic and environmental pressures is crucial for tracking demographic shifts, phenotypic change and ensuring population sustainability. Traditional regression methods often focus on modelling the conditional mean of life‐history traits, potentially overlooking heterogeneity in ...
Guankui Liu +4 more
wiley +1 more source
Shuitu Baochi Xuebao, 2006 在福建省东山县滨海沙地，开展了不同年龄木麻黄林地根际和非根际土壤养分和酶活性的测定，研究结果表明：（1）不同年龄木麻黄林地根际pH小于非根际土壤，随林龄增长根际土壤和非根际土壤pH值均表现为下降趋势；根际土壤有机质、全氮和水解氮含量高于非根际土壤，各土层有机质含量在中龄林时最大；从中龄林阶段至过熟林，水解氮含量下降；全磷和速效磷含量从幼林发育至中龄林、近熟林逐渐减少，至过熟林略有恢复；根际土壤全钾、速效钾含量呈增加趋势。（2）不同年龄木麻黄林地根际CEC值、水解性总酸度、交换性盐基总量、交换性Mg^2 ...
叶功富 +5 more
doaj +2 more sources
Regulation &Governance, Volume 20, Issue 1, Page 35-63, January 2026.ABSTRACT Existing literature largely agrees that authoritarian regimes establish channels for political participation to gather valuable information on citizens' anti‐regime sentiments and policy preferences and to supervise lower‐level bureaucrats and firms.
Anton Bogs
wiley +1 more source