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   2344010篇
  免费   175095篇
  国内免费   3311篇
耳鼻咽喉   32057篇
儿科学   75869篇
妇产科学   62675篇
基础医学   348057篇
口腔科学   63633篇
临床医学   211040篇
内科学   456322篇
皮肤病学   51731篇
神经病学   185220篇
特种医学   88025篇
外国民族医学   489篇
外科学   353775篇
综合类   47441篇
现状与发展   12篇
一般理论   851篇
预防医学   182351篇
眼科学   54241篇
药学   175004篇
  9篇
中国医学   4575篇
肿瘤学   129039篇
  2021年   18979篇
  2019年   19536篇
  2018年   27051篇
  2017年   20359篇
  2016年   22744篇
  2015年   25646篇
  2014年   36102篇
  2013年   53975篇
  2012年   74704篇
  2011年   79429篇
  2010年   47067篇
  2009年   44578篇
  2008年   74633篇
  2007年   79518篇
  2006年   80324篇
  2005年   77813篇
  2004年   74390篇
  2003年   71703篇
  2002年   69378篇
  2001年   108755篇
  2000年   111460篇
  1999年   93505篇
  1998年   26993篇
  1997年   23665篇
  1996年   24057篇
  1995年   22720篇
  1994年   20899篇
  1993年   19714篇
  1992年   72015篇
  1991年   70081篇
  1990年   68408篇
  1989年   65682篇
  1988年   60318篇
  1987年   59140篇
  1986年   55226篇
  1985年   53030篇
  1984年   39323篇
  1983年   33416篇
  1982年   19867篇
  1979年   35895篇
  1978年   25667篇
  1977年   21247篇
  1976年   20345篇
  1975年   21835篇
  1974年   26162篇
  1973年   24812篇
  1972年   23210篇
  1971年   22055篇
  1970年   20251篇
  1969年   19291篇
排序方式: 共有10000条查询结果,搜索用时 3 毫秒
31.
BackgroundThe aim of this study was to estimate the prevalence of dental prosthetic treatment and to investigate the demographic, social, economic and medical factors associated with the use of fixed and removable dentures in a representative sample of adults living in France.MethodsThe data were obtained from the 2002–2003 Decennial Health Survey, a cross-sectional study of a representative sample of the population living in France, which included 29,679 adults. Information was collected by interview. The variables collected were fixed denture, removable denture, age, gender, number of children, area of residence, nationality, educational attainment, family social status, employment status, annual household income per capita, supplementary insurance, chronic disease, eyesight problems/glasses, hearing problems/hearing aids. Multinomial logistic regression models were used to study the relationship between prosthetic treatment and demographic, socioeconomic and medical characteristics unadjusted, adjusted for age and adjusted for all the characteristics.ResultsThe prevalence of prosthetic treatment was 34.6% (95% confidence interval (CI): [34.1; 35.2]) for fixed prosthetic dentures and 13.8% (95% CI: [13.4; 14.2]) for removable prosthetic dentures. We showed a gradient between educational attainment and removable dentures; the odds ratio adjusted for all the variables (aOR) associated with no or primary education compared to post-secondary education was 2.56; 95% CI: [2.09; 3.13]. When annual household income per capita was low, subjects were less likely to report fixed dentures (aOR = 0.68; 95% CI: [0.62; 0.75]) than those with high annual household income per capita. Individuals without insurance less often reported fixed dentures than those with private insurance. Those reporting chronic disease were less likely to report fixed dentures (aOR = 0.87; 95% CI: [0.79; 0.95]) but more likely to report removable dentures (aOR = 1.29; 95% CI: [1.17; 1.43]) than those without chronic disease.ConclusionThis study reveals social, economic and medical inequalities in fixed and removable prosthetic treatment among adults in France.  相似文献   
32.
33.
34.
35.
Graefe's Archive for Clinical and Experimental Ophthalmology - The published online version contains mistake as the author's first name and last name have been interchanged as "Hild...  相似文献   
36.
37.
38.
39.
40.
Abstract

Objective: This study aims at identifying associations between cognitive function and suicidal ideation in the sample of patients with anxiety and mood disorders (AMD).

Methods: In sum, 186 (age = 39?±?12.3 years; 142 [76.3%] females) patients with AMD were enrolled in the study. Assessment included evaluation of socio-demographic information, medication use, anxiety and depression symptoms. Cognitive tests included measures of psychomotor performance and incidental learning using the Digit Symbol Test. Trail Making Tests respectively measured perceptual speed, task-switching and executive control. Additionally, 21 patients completed tests from the Cambridge Automated Neuropsychological Test Battery measuring set shifting (Interdimensional/extradimensional set-shift), executive planning (Stockings of Cambridge), and decision making (Cambridge Gamble Task [CGT]).

Results: Almost half (45.0%, n?=?86) of the study sample patients had experienced suicidal ideations. In multivariable regression analysis, suicidal ideation was associated with a greater overall proportion of bet and risk taking on the CGT task (β?=?0.726, p?=?.010 and β?=?0.634, p?=?.019), when controlling for socio-demographic characteristics, medication use, anxiety and depression symptoms.

Conclusions: Outpatients with AMD and suicidal ideation could be distinguished by the presence of cognitive deficits in the executive function domain, particularly in impulse-control and risk taking.  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