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   2353267篇
  免费   175457篇
  国内免费   3359篇
耳鼻咽喉   32160篇
儿科学   75963篇
妇产科学   62749篇
基础医学   349217篇
口腔科学   63808篇
临床医学   211598篇
内科学   458529篇
皮肤病学   51896篇
神经病学   185933篇
特种医学   88347篇
外国民族医学   489篇
外科学   355595篇
综合类   47495篇
现状与发展   12篇
一般理论   849篇
预防医学   182724篇
眼科学   54418篇
药学   175784篇
  9篇
中国医学   4608篇
肿瘤学   129900篇
  2021年   19153篇
  2019年   19670篇
  2018年   27201篇
  2017年   20488篇
  2016年   22915篇
  2015年   25783篇
  2014年   36291篇
  2013年   54249篇
  2012年   75053篇
  2011年   79853篇
  2010年   47293篇
  2009年   44804篇
  2008年   74936篇
  2007年   79880篇
  2006年   80692篇
  2005年   78171篇
  2004年   74753篇
  2003年   72079篇
  2002年   69773篇
  2001年   109043篇
  2000年   111758篇
  1999年   93788篇
  1998年   27112篇
  1997年   23766篇
  1996年   24141篇
  1995年   22787篇
  1994年   20963篇
  1993年   19778篇
  1992年   72261篇
  1991年   70314篇
  1990年   68640篇
  1989年   65892篇
  1988年   60513篇
  1987年   59345篇
  1986年   55431篇
  1985年   53163篇
  1984年   39434篇
  1983年   33508篇
  1982年   19901篇
  1979年   35959篇
  1978年   25696篇
  1977年   21266篇
  1976年   20366篇
  1975年   21845篇
  1974年   26189篇
  1973年   24847篇
  1972年   23250篇
  1971年   22076篇
  1970年   20287篇
  1969年   19349篇
排序方式: 共有10000条查询结果,搜索用时 31 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