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   2745篇
  免费   209篇
  国内免费   39篇
耳鼻咽喉   21篇
儿科学   178篇
妇产科学   29篇
基础医学   356篇
口腔科学   97篇
临床医学   228篇
内科学   543篇
皮肤病学   193篇
神经病学   208篇
特种医学   166篇
外科学   287篇
综合类   14篇
一般理论   1篇
预防医学   301篇
眼科学   28篇
药学   181篇
中国医学   2篇
肿瘤学   160篇
  2023年   11篇
  2022年   16篇
  2021年   32篇
  2020年   25篇
  2019年   37篇
  2018年   60篇
  2017年   63篇
  2016年   45篇
  2015年   57篇
  2014年   85篇
  2013年   90篇
  2012年   131篇
  2011年   117篇
  2010年   92篇
  2009年   80篇
  2008年   136篇
  2007年   156篇
  2006年   140篇
  2005年   127篇
  2004年   135篇
  2003年   92篇
  2002年   96篇
  2001年   86篇
  2000年   81篇
  1999年   60篇
  1998年   49篇
  1997年   47篇
  1996年   54篇
  1995年   30篇
  1994年   44篇
  1993年   37篇
  1992年   72篇
  1991年   75篇
  1990年   66篇
  1989年   71篇
  1988年   61篇
  1987年   49篇
  1986年   44篇
  1985年   47篇
  1984年   31篇
  1983年   24篇
  1982年   21篇
  1981年   18篇
  1980年   16篇
  1979年   9篇
  1978年   7篇
  1977年   9篇
  1975年   13篇
  1974年   9篇
  1971年   6篇
排序方式: 共有2993条查询结果,搜索用时 0 毫秒
61.
62.
63.
64.
65.
66.
67.
ABSTRACT: BACKGROUND: Assessment of patients' views are essential to provide a patient-centred health service and to evaluating quality of care. As no standardized and validated system for measuring patients' experiences in accident and emergency departments existed, we have developed the Consumer Quality index for the accident and emergency department (CQI A&E). METHODS: Qualitative research has been undertaken to determine the content validity of the CQI A&E. In order to assess psychometric characteristics an 84-item questionnaire was sent to 653 patients who had attended a large A&E in the Netherlands. Also, fifty importance questions were added to determine relevance of the questions and for future calculations of improvement scores. Exploratory factor analysis was applied to detect the domains of the questionnaire. RESULTS: Survey data of 304 (47%) patients were used for the analysis. The first exploratory factor analysis resulted in three domains based on 13 items: 'Attitude of the healthcare professionals', 'Environment and impression of the A&E' and 'Respect for and explanation to the patient'. The first two had an acceptable internal consistency. The second analysis, included 24 items grouped into 5 domains: 'Attitude of the healthcare professionals', 'Information and explanation', 'Environment of the A&E','Leaving the A&E' and 'General information and rapidity of care'. All factors were internal consistent. According to the patients, the three most important aspects in healthcare performance in the A&E were: trust in the competence of the healthcare professionals, hygiene in the A&E and patients' health care expectations. In general, the highest improvement scores concerned patient information. CONCLUSIONS: The Consumer Quality index for the accident and emergency department measures patients' experiences of A&E healthcare performance. Preliminary psychometric characteristics are sufficient to justify further research into reliability and validity.  相似文献   
68.

Introduction  

Obstructive sleep apnea (OSA) affects up to 30% of the adult population and is a risk factor for coronary artery disease (CAD). The diagnostic process, involving polysomnography, may be complex. Berlin questionnaire (BQ) is a validated and economical screening tool.  相似文献   
69.
This study describes the changes that have taken place in patientcharacteristics in 25 years of aortic valve replacement usingmechanical valves, and looks for risk factors for early andlate mortality. During this period, 1449 mechanical valves wereimplanted. Overall early mortality (<30 days) was 5·3%and for aortic valve replacement without concomitant procedures3·9%. Overall survival rates at 5, 10 and 15 years were80%, 63% and 49%, respectively. Despite an increased proportionof higher risk patients (older age, more reoperations, moreconcomitant coronary bypass surgery) survival rates improvedthroughout the study period. Early mortality was related toan early year of operation, urgency, reoperation and concomitantsurgery to the tricuspid valve or ascending aorta. Late mortalitywas higher for patients of older age, with an early year ofoperation, male gender, concomitant coronary bypass surgery,mitral valve surgery or replacement of the ascending aorta.Aortic regurgitation did not have a major influence on earlynor late mortality. The improvement in early and late mortalityin more recent years was largely the result of the introductionof cardioplegia. A changing, non-proportional effect was observedfor several risk factors during the follow-up period. This studyillustrates the changes and improvements in medical care thathave taken place in patients requiring aortic valve replacement.  相似文献   
70.
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