首页 | 本学科首页   官方微博 | 高级检索  
文章检索
  按 检索   检索词:      
出版年份:   被引次数:   他引次数: 提示:输入*表示无穷大
  收费全文   736篇
  免费   25篇
  国内免费   2篇
耳鼻咽喉   3篇
儿科学   31篇
妇产科学   8篇
基础医学   93篇
口腔科学   14篇
临床医学   79篇
内科学   52篇
皮肤病学   6篇
神经病学   265篇
特种医学   3篇
外科学   23篇
综合类   13篇
预防医学   104篇
眼科学   4篇
药学   40篇
中国医学   4篇
肿瘤学   21篇
  2023年   14篇
  2022年   19篇
  2021年   25篇
  2020年   27篇
  2019年   22篇
  2018年   35篇
  2017年   21篇
  2016年   17篇
  2015年   17篇
  2014年   44篇
  2013年   77篇
  2012年   50篇
  2011年   61篇
  2010年   58篇
  2009年   47篇
  2008年   39篇
  2007年   43篇
  2006年   18篇
  2005年   19篇
  2004年   16篇
  2003年   12篇
  2002年   11篇
  2001年   5篇
  2000年   6篇
  1999年   5篇
  1998年   6篇
  1997年   3篇
  1996年   4篇
  1995年   1篇
  1994年   1篇
  1993年   3篇
  1991年   4篇
  1990年   3篇
  1988年   1篇
  1987年   1篇
  1986年   4篇
  1985年   3篇
  1983年   1篇
  1982年   2篇
  1979年   3篇
  1978年   2篇
  1977年   3篇
  1976年   3篇
  1975年   4篇
  1974年   1篇
  1973年   1篇
  1968年   1篇
排序方式: 共有763条查询结果,搜索用时 328 毫秒
1.
2.
《Vaccine》2020,38(45):7118-7128
IntroductionToward the Global Vaccine Action Plan 2020 goal, almost 90% of countries have established a National Immunization Technical Advisory Group (NITAG). However, little is known about NITAG's contributions to governance.MethodsIn 2017–2018, a two-step, qualitative retrospective study was conducted. Jordan (JO), Argentina (AR), and South Africa (SA) were selected owing to government-financed NITAGs from middle-income countries (MICs), geographic diversity, and a vaccine introduction with NITAG support. Country case studies were developed, collecting data through desk review and face-to-face key informant interviews (KIIs) from Ministry of Health (MoH) and NITAG. Case studies were analyzed together, to assess governance applying the European Observatory on Health Systems and Policies framework focusing on transparency, accountability, participation, integrity, and policy capacity (TAPIC).ResultsDocument review and 53 KII (22 AR, 20 SA, 11 JO) showed NITAGs played a pivotal role as advisors promoting a culture of evidence-informed policies. NITAGs strengthened governance, although practices varied among countries. Meetings were conducted behind-closed-doors, participation restricted to members, only in one country agendas, and recommendations were public (AR). To increase participation, policy capacity, and transparency, countries considered adding experts in communications, advocacy, and economics. AR and SA contemplated including community members. NITAGs functioned autonomously from the government, with no established internal or external monitoring or supervision. NITAG meeting minutes allowed the review of integrity, adherence to terms of reference, standard operating procedures, and conflict of interest (CoI). For the most part, NITAGs abided by their mandates. Significant issues were related to the level of MoH support and oversight of CoI declaration and documentation.ConclusionsSystematically implementing governance approaches could improve processes, better tailor policies, and implementation. The long-term survival and resilience of NITAGs in these countries showed they play a significant role in strengthening governance. Lessons learned could be useful to those promoting country-driven evidence-informed decision-making.  相似文献   
3.
4.
While decreasing trend in gender differences in alcohol use disorders was reported in Western countries, the change in Asian countries is unknown. This study aims to explore the shifts in gender difference in alcohol abuse (AA) and dependence (AD) in Korea. We compared the data from two nation-wide community surveys to evaluate gender differences in lifetime AA and AD by Diagnostic and Statistical Manual of Mental Disorders, Fourth Edition (DSM-IV). Face-to-face interviews using the Composite International Diagnostic Interview (CIDI) were applied to all subjects in 2001 (n=6,220) and 2011 (n=6,022). Male-to-female ratio of odds was decreased from 6.41 (95% CI, 4.81-8.54) to 4.37 (95% CI, 3.35-5.71) for AA and from 3.75 (95% CI, 2.96-4.75) to 2.40 (95% CI, 1.80-3.19) for AD. Among those aged 18-29, gender gap even became statistically insignificant for AA (OR, 1.59; 95% CI, 0.97-2.63) and AD (OR, 1.18; 95% CI, 0.80-2.41) in 2011. Men generally showed decreased odds for AD (0.55; 95% CI, 0.45-0.67) and women aged 30-39 showed increased odds for AA (2.13; 95% CI 1.18-3.84) in 2011 compared to 2001. Decreased AD in men and increased AA in women seem to contribute to the decrease of gender gap. Increased risk for AA in young women suggests needs for interventions.  相似文献   
5.
An assessment of medical students' psychiatric performance demonstrated no association between the ability to rate psychopathology or to observe interview behaviour and traditional written methods of academic achievement. This is in accordance with those few studies which have addressed this issue and indicates that there may well be at least three independent skills involved in clinical decision-making: the ability to engage in interpersonal interaction and elicit information; and the ability to acquire and use academic knowledge. This is consistent with work suggesting that maturational and learning processes influence clinical reasoning, and demonstrates that each component should be addressed in assessing students in psychiatry.  相似文献   
6.
A program called “An Epidemiological Approach to Computerized Medical Diagnosis” (AEDMI) is presented. Using an interactive questionnaire, physician-patient interviews are conducted and a summary of the relevant clinical data is provided. Standard items, obained on a multi-centre basis, form a large-scale data base. Simultaneously, the reasoning of clinical experts in each real case is analyzed to obtain a knowledge-rules data base. The methodology of the program combines Bayesian systems, expert systems, and other new lines of researcg such as neural networks or case-based reasoning. The general concepts of clinical decision making aid systems are reviewed. This publication is aimed at obtaining international cooperation.  相似文献   
7.
Biological markers play an evolving role in the diagnosis of Alzheimer disease (AD). We compare conventional measurements of cerebrospinal fluid (CSF) tau and β-amyloid1–42 proteins to a novel approach – Fourier transformed infrared (FT-IR) spectroscopy – a simple technique derived from chemical and physical sciences that characterizes intramolecular bonds. For automatic diagnostic analysis, we developed an artificial neural network (ANN). We examined 71 patients with a clinical diagnosis of AD and 66 controls. β-Amyloid1–42 was decreased (sensitivity 80% and specificity 78%); tau was elevated (sensitivity 76% and specificity 88%) in CSF of AD patients. The combined tau/β-amyloid1–42 quotient was able to distinguish healthy from diseased subjects with 99% sensitivity and 86% specificity. The ANN could separate FT-IR spectroscopy data with 88.5% sensitivity and 80% specificity. FT-IR spectroscopy proved to be cost-effective and simple to perform. Diagnostic sensitivity and specificity is in the range of CSF tau and β-amyloid1–42 protein analysis. Larger sample numbers for ANN training and validation could increase diagnostic accuracy and thus prove to be a useful screening tool.  相似文献   
8.
AimWith the aim of providing a foundation for evidence-based public health actions, as well as the more individualised clinical treatment of migraine in Slovenia, the objective of our study was to assess the association between poor self-rated health (PSRH) and migraine, adjusted for selected comorbidity and socioeconomic factors.MethodsThe survey, conducted between August and December 2014, involved included 6,262 adults aged 15 years and over. Binary logistic regression was used in univariate as well as multivariate analysis. Three multivariate models were defined: MODEL 1 (migraine and comorbidities related to the physical dimension of health); MODEL 2 (comorbidities related to the mental dimension of health); MODEL 3 (demographic and socioeconomic factors).ResultsIn univariate as well as all three multivariate models, the odds of PSRH were statistically significantly higher in migraine sufferers in comparison to non-sufferers (univariate model: ORmigraine=yes vs. migraine=no=2.22 (p<0.001); MODEL 1: ORmigraine=yes vs. migraine=no=2.27 (p<0.001); MODEL 2: ORmigraine=yes vs. migraine=no=1.51 (p=0.002); MODEL 3: ORmigraine=yes vs. migraine=no=1.56 (p=0.001)).ConclusionMigraine is an important PSRH-related factor. Comorbidities related to the physical dimension of health do not reduce the power of association between migraine and PRSH, while comorbidities related to the mental dimension reduce the power of association of migraine and other health conditions. The power of the association between migraine and PRSH is also independent of demographic/socioeconomic factors. We can also conclude that migraine seems to be a phenomenon that is in a bi-directional relationship with mental states (thus having an impact on PSRH) and is itself a stressor.  相似文献   
9.
The Zarit Burden Interview has been the most popularly used tool for measuring caregiver burden and with the 60 years and over population in Jamaica and developing countries expected to increase, caregiver burden and its assessment assume increased importance. Establishing the reliability and underlying factor structure of instruments such as the ZBI is critical. This study sought to determine the reliability of the Zarit Burden Interview and to assess its underlying factor structure. The ZBI was administered to 180 caregivers of community dwelling older persons in Jamaica in a nationally representative sample across four geographic health regions in 2016. The factor structure was identified using exploratory factor analysis (EFA) with Varimax rotation. Cronbach's alpha was used to assess internal consistency/reliability of the instrument. The internal consistency/reliability of the ZBI instrument was high (Cronbach's α = 0.859) and the corrected item-total correlations ranged from 0.134 to 0.730. The ZBI mean score was found to be 16.92 ± 12.04. EFA produced a six-factor model comprised of 19 items which explained 48.97% of total variance, and was subsequently reduced to four (37.27% of total variance) via the use of parallel analysis and scrutiny of confidence intervals. The four factors identified were ‘personal strain’, ‘social relations disruption’, ‘resource strain/imbalance’ and ‘role intensity’. The ZBI-22 tool is a reliable instrument for evaluating caregiver burden among community dwelling older persons in Jamaica. A four factor model has emerged providing greater insights on the underlying constructs of the ZBI, the most widely used caregiver burden assessment tool.  相似文献   
10.
吸毒人员相关信息访谈分析   总被引:7,自引:2,他引:7  
罗洁 《中国健康教育》2006,22(2):115-118
目的深入了解吸毒者的吸毒原因、社会背景、心理状态及与艾滋病相关的知识、态度、行为现状,为开展有针对性的健康教育和减低毒品危害的干预措施提供信息。方法由经过培训的无身份标志的访谈员与100名吸毒者进行一对一的面对面访谈,用资料记录方法记录整理分析访谈内容。结果本市吸毒者以男性为主,占84%,17~35岁的青壮年占大多数,为70%;91%的吸毒者平时主要依靠静脉注射海洛因吸毒,在吸毒过程中有91%的吸毒者和他人一次或多次共用过注射器;男女吸毒者在商业性性行为中,安全套的使用率仅为35%;吸毒者对美沙酮替代或针具交换的看法表示欢迎与愿意接受,但存在安全忧虑的心理。结论吸毒者普遍存在着与艾滋病病毒感染和扩散相关的高危行为,但吸食毒品与预防艾滋病重要性相比吸毒者首先考虑需求的通常是前者,因此,需要全社会普遍关注吸毒传播艾滋病危险,主动采取干预对策和措施,才能在源头上有效遏制艾滋病经吸毒人群传播。  相似文献   
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号