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   2605627篇
  免费   181171篇
  国内免费   3908篇
耳鼻咽喉   34197篇
儿科学   85188篇
妇产科学   67885篇
基础医学   377876篇
口腔科学   68688篇
临床医学   231271篇
内科学   507412篇
皮肤病学   54817篇
神经病学   209031篇
特种医学   98708篇
外国民族医学   490篇
外科学   390947篇
综合类   50414篇
现状与发展   12篇
一般理论   887篇
预防医学   208367篇
眼科学   58414篇
药学   190235篇
  11篇
中国医学   5554篇
肿瘤学   150302篇
  2021年   22084篇
  2019年   22150篇
  2018年   49858篇
  2017年   38477篇
  2016年   44016篇
  2015年   29432篇
  2014年   40706篇
  2013年   59677篇
  2012年   88495篇
  2011年   106368篇
  2010年   68004篇
  2009年   58910篇
  2008年   99188篇
  2007年   106975篇
  2006年   86582篇
  2005年   85443篇
  2004年   83123篇
  2003年   81380篇
  2002年   76544篇
  2001年   109570篇
  2000年   112434篇
  1999年   94241篇
  1998年   27914篇
  1997年   24549篇
  1996年   24662篇
  1995年   23268篇
  1994年   21425篇
  1993年   20171篇
  1992年   72366篇
  1991年   70429篇
  1990年   68739篇
  1989年   65939篇
  1988年   60568篇
  1987年   59363篇
  1986年   55458篇
  1985年   53218篇
  1984年   39498篇
  1983年   33582篇
  1982年   20098篇
  1979年   36041篇
  1978年   25783篇
  1977年   21314篇
  1976年   20453篇
  1975年   21870篇
  1974年   26246篇
  1973年   24841篇
  1972年   23233篇
  1971年   22066篇
  1970年   20313篇
  1969年   19374篇
排序方式: 共有10000条查询结果,搜索用时 21 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