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   2355175篇
  免费   175620篇
  国内免费   3390篇
耳鼻咽喉   32103篇
儿科学   76146篇
妇产科学   62978篇
基础医学   349350篇
口腔科学   63780篇
临床医学   211952篇
内科学   459023篇
皮肤病学   51920篇
神经病学   185937篇
特种医学   88254篇
外国民族医学   489篇
外科学   355101篇
综合类   47641篇
现状与发展   12篇
一般理论   855篇
预防医学   183573篇
眼科学   54486篇
药学   175691篇
  11篇
中国医学   4622篇
肿瘤学   130261篇
  2021年   19224篇
  2019年   19698篇
  2018年   27297篇
  2017年   20533篇
  2016年   22935篇
  2015年   25876篇
  2014年   36411篇
  2013年   54383篇
  2012年   75203篇
  2011年   79932篇
  2010年   47425篇
  2009年   44856篇
  2008年   75071篇
  2007年   79935篇
  2006年   80740篇
  2005年   78189篇
  2004年   74791篇
  2003年   72101篇
  2002年   69773篇
  2001年   108978篇
  2000年   111653篇
  1999年   93714篇
  1998年   27115篇
  1997年   23745篇
  1996年   24153篇
  1995年   22804篇
  1994年   20958篇
  1993年   19775篇
  1992年   72123篇
  1991年   70179篇
  1990年   68500篇
  1989年   65775篇
  1988年   60390篇
  1987年   59175篇
  1986年   55286篇
  1985年   53067篇
  1984年   39364篇
  1983年   33437篇
  1982年   19888篇
  1979年   35907篇
  1978年   25661篇
  1977年   21250篇
  1976年   20353篇
  1975年   21842篇
  1974年   26171篇
  1973年   24827篇
  1972年   23209篇
  1971年   22055篇
  1970年   20269篇
  1969年   19340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