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   2355886篇
  免费   175643篇
  国内免费   3334篇
耳鼻咽喉   32303篇
儿科学   76144篇
妇产科学   62951篇
基础医学   349551篇
口腔科学   63798篇
临床医学   212164篇
内科学   458605篇
皮肤病学   52184篇
神经病学   186217篇
特种医学   88572篇
外国民族医学   489篇
外科学   355692篇
综合类   47578篇
现状与发展   12篇
一般理论   867篇
预防医学   183231篇
眼科学   54581篇
药学   175551篇
  11篇
中国医学   4576篇
肿瘤学   129786篇
  2021年   19103篇
  2019年   19649篇
  2018年   27217篇
  2017年   20478篇
  2016年   22923篇
  2015年   25808篇
  2014年   36378篇
  2013年   54312篇
  2012年   75150篇
  2011年   79931篇
  2010年   47387篇
  2009年   44862篇
  2008年   75082篇
  2007年   79993篇
  2006年   80786篇
  2005年   78280篇
  2004年   74792篇
  2003年   72114篇
  2002年   69796篇
  2001年   109005篇
  2000年   111735篇
  1999年   93752篇
  1998年   27124篇
  1997年   23794篇
  1996年   24171篇
  1995年   22815篇
  1994年   21005篇
  1993年   19799篇
  1992年   72191篇
  1991年   70266篇
  1990年   68558篇
  1989年   65831篇
  1988年   60445篇
  1987年   59251篇
  1986年   55377篇
  1985年   53144篇
  1984年   39419篇
  1983年   33487篇
  1982年   19921篇
  1979年   35947篇
  1978年   25719篇
  1977年   21295篇
  1976年   20393篇
  1975年   21885篇
  1974年   26222篇
  1973年   24887篇
  1972年   23263篇
  1971年   22113篇
  1970年   20313篇
  1969年   19369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