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   2417404篇
  免费   175320篇
  国内免费   3311篇
耳鼻咽喉   32573篇
儿科学   78578篇
妇产科学   63842篇
基础医学   355814篇
口腔科学   64054篇
临床医学   215720篇
内科学   471786篇
皮肤病学   52074篇
神经病学   192501篇
特种医学   91405篇
外国民族医学   489篇
外科学   366528篇
综合类   48137篇
现状与发展   12篇
一般理论   848篇
预防医学   189142篇
眼科学   55040篇
药学   178564篇
  10篇
中国医学   4579篇
肿瘤学   134339篇
  2021年   18971篇
  2019年   19535篇
  2018年   35295篇
  2017年   27053篇
  2016年   30865篇
  2015年   25929篇
  2014年   36326篇
  2013年   54149篇
  2012年   77042篇
  2011年   86872篇
  2010年   52976篇
  2009年   48995篇
  2008年   82199篇
  2007年   88931篇
  2006年   80475篇
  2005年   79283篇
  2004年   76411篇
  2003年   74696篇
  2002年   71430篇
  2001年   108975篇
  2000年   111889篇
  1999年   93654篇
  1998年   27154篇
  1997年   23881篇
  1996年   24170篇
  1995年   22856篇
  1994年   21040篇
  1993年   19834篇
  1992年   72104篇
  1991年   70190篇
  1990年   68501篇
  1989年   65751篇
  1988年   60385篇
  1987年   59219篇
  1986年   55299篇
  1985年   53097篇
  1984年   39366篇
  1983年   33454篇
  1982年   19937篇
  1979年   35961篇
  1978年   25703篇
  1977年   21245篇
  1976年   20392篇
  1975年   21817篇
  1974年   26171篇
  1973年   24806篇
  1972年   23202篇
  1971年   22038篇
  1970年   20271篇
  1969年   19342篇
排序方式: 共有10000条查询结果,搜索用时 250 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