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   2478803篇
  免费   201644篇
  国内免费   5352篇
耳鼻咽喉   36448篇
儿科学   80578篇
妇产科学   64778篇
基础医学   351823篇
口腔科学   65508篇
临床医学   234854篇
内科学   497819篇
皮肤病学   58398篇
神经病学   198171篇
特种医学   93464篇
外国民族医学   489篇
外科学   388983篇
综合类   47772篇
现状与发展   84篇
一般理论   852篇
预防医学   189034篇
眼科学   57397篇
药学   176422篇
  11篇
中国医学   4617篇
肿瘤学   138297篇
  2021年   21774篇
  2019年   21477篇
  2018年   33428篇
  2017年   26604篇
  2016年   29730篇
  2015年   32743篇
  2014年   49246篇
  2013年   67426篇
  2012年   79951篇
  2011年   84768篇
  2010年   56116篇
  2009年   56721篇
  2008年   80053篇
  2007年   83490篇
  2006年   86286篇
  2005年   81455篇
  2004年   77361篇
  2003年   73714篇
  2002年   71469篇
  2001年   111918篇
  2000年   113998篇
  1999年   96180篇
  1998年   30040篇
  1997年   26507篇
  1996年   26765篇
  1995年   25351篇
  1994年   22458篇
  1993年   20980篇
  1992年   73114篇
  1991年   71245篇
  1990年   69263篇
  1989年   66613篇
  1988年   61125篇
  1987年   59856篇
  1986年   55972篇
  1985年   53598篇
  1984年   39763篇
  1983年   33822篇
  1982年   20276篇
  1979年   36116篇
  1978年   25922篇
  1977年   21549篇
  1976年   20533篇
  1975年   22054篇
  1974年   26334篇
  1973年   24997篇
  1972年   23461篇
  1971年   22186篇
  1970年   20450篇
  1969年   19377篇
排序方式: 共有10000条查询结果,搜索用时 31 毫秒
41.
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   
42.
43.
44.
45.
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   
46.
47.
48.
49.
50.
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