Results 41 to 50 of about 1,002,542 (153)
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
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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
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Asian Politics &Policy, Volume 18, Issue 3, July 2026.ABSTRACT Using data from the 2021–2022 Korean National Human Rights Survey (N = 33,741), this study examines how demographic, ideological, religious, and educational factors shape acceptance of six minority groups in South Korea. Logistic regression analyses show that women, individuals with higher education and income, and those exposed to human ...
Yuri Lee
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, 2015 长期以来,在传统孝道文化的影响下,我国老年人（特别是高龄老人）往往选择与成年子女一起居住。这种居住方式也是老年人最好的选择,使他们能够安享幸福的晚年生活。然而,随着社会经济和城镇化的迅速发展,我国的家庭结构和社会价值观念已经发生了很多变化,特别是家庭核心化趋势明显,老年人独立居住（国内也称空巢老人）的比例在急剧升高。在当今中国,与成年子女一起居住仍然是我国高龄老人最感到更幸福吗？中国科学院心理健康重点实验室韩布新研究员的课题组使用中国老年人健康长寿调查数据库 ...
陈天勇
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Wildlife Letters, Volume 4, Issue 2, Page 83-93, June 2026.Birdwatching in Nepal has high potential to support avain biodiversity and tourism. Conservation was identified as the primary motivation for birdwatching, followed by enjoyment and achievement purposes. Health/wellbeing benefits, social and economic factors showed moderate representation, whereas academic motivation played a relatively minor role ...
Kamal Raj Gosai, Hem Bahadur Katuwal
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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
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Rare Metals, Volume 45, Issue 4, April 2026.ABSTRACT This study presents an assessment of four representative expansive additives—calcium sulphoaluminate–calcium oxide, magnesium oxide, sodium lauryl sulfate, and sodium abietate—and their effects on the expansion behavior, mechanical development, and microstructural characteristics of cemented paste backfill (CPB).
Lijie Guo +5 more
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, 2007 目的:分析我国高龄老人的心理状况及其影响因素。方法:依据北京大学老龄健康与家庭研究中心2002年中国老年人健康长寿调查数据库,分析高龄老人的心理状况及其影响因素。结果:大多数高龄和低龄老人(65.9%-98.9%,中位数93.1%)心理状况的评分在一般及以上,其中生活满意度的评分随增龄呈增高趋势,心理特点的评分随增龄明显下降。受教育程度高、居住在城市、主要经济来源靠自己或配偶的退休金以及住养老院的高龄老人生活满意度和心理特点的评分相对较高(平均分>3.82,F=34.19~190.88 ...
陈天勇, 李德明, 吴振云
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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
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Zhongguo shiyan zhenduanxue, 2013 目的分析高龄腰痛患者腰椎骨折和骨质疏松的相关性,探讨其诊断特点。方法选择200例以腰痛为主诉症状的患者,以性别与年龄作为分组依据,采用双能X线骨密度仪进行检测。结果 200例腰痛患者中,发生骨质疏松症113例,女性61.54%（96/156）远多于男性38.64%（17/44）,高龄组发生比例明显多于低龄组;检出腰椎骨折椎体数28个,L1骨折71.43%（20/28）明显高于L2、L3 ...
王晓锋, 张跃辉
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