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   2375662篇
  免费   177001篇
  国内免费   3402篇
耳鼻咽喉   32338篇
儿科学   76650篇
妇产科学   63341篇
基础医学   351926篇
口腔科学   64174篇
临床医学   214256篇
内科学   462785篇
皮肤病学   52166篇
神经病学   188293篇
特种医学   88943篇
外国民族医学   489篇
外科学   358589篇
综合类   47865篇
现状与发展   13篇
一般理论   878篇
预防医学   185321篇
眼科学   55093篇
药学   177165篇
  11篇
中国医学   4658篇
肿瘤学   131111篇
  2021年   19613篇
  2019年   20140篇
  2018年   27810篇
  2017年   20871篇
  2016年   23262篇
  2015年   26292篇
  2014年   37076篇
  2013年   55249篇
  2012年   76710篇
  2011年   81590篇
  2010年   48260篇
  2009年   45643篇
  2008年   76545篇
  2007年   81590篇
  2006年   82295篇
  2005年   79757篇
  2004年   76261篇
  2003年   73419篇
  2002年   70940篇
  2001年   109002篇
  2000年   111696篇
  1999年   93781篇
  1998年   27311篇
  1997年   23957篇
  1996年   24329篇
  1995年   22938篇
  1994年   21111篇
  1993年   19908篇
  1992年   72171篇
  1991年   70214篇
  1990年   68502篇
  1989年   65775篇
  1988年   60433篇
  1987年   59244篇
  1986年   55323篇
  1985年   53112篇
  1984年   39423篇
  1983年   33521篇
  1982年   20014篇
  1979年   35941篇
  1978年   25747篇
  1977年   21324篇
  1976年   20395篇
  1975年   21890篇
  1974年   26208篇
  1973年   24854篇
  1972年   23250篇
  1971年   22071篇
  1970年   20276篇
  1969年   19333篇
排序方式: 共有10000条查询结果,搜索用时 15 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