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   2345925篇
  免费   175199篇
  国内免费   3332篇
耳鼻咽喉   32054篇
儿科学   75976篇
妇产科学   62699篇
基础医学   348272篇
口腔科学   63731篇
临床医学   211045篇
内科学   456540篇
皮肤病学   51794篇
神经病学   185393篇
特种医学   88220篇
外国民族医学   489篇
外科学   354114篇
综合类   47447篇
现状与发展   12篇
一般理论   848篇
预防医学   182308篇
眼科学   54259篇
药学   175295篇
  9篇
中国医学   4579篇
肿瘤学   129372篇
  2021年   19035篇
  2019年   19579篇
  2018年   27127篇
  2017年   20416篇
  2016年   22810篇
  2015年   25711篇
  2014年   36167篇
  2013年   54046篇
  2012年   74842篇
  2011年   79591篇
  2010年   47184篇
  2009年   44658篇
  2008年   74768篇
  2007年   79634篇
  2006年   80458篇
  2005年   77942篇
  2004年   74523篇
  2003年   71859篇
  2002年   69524篇
  2001年   108836篇
  2000年   111571篇
  1999年   93633篇
  1998年   27046篇
  1997年   23687篇
  1996年   24092篇
  1995年   22751篇
  1994年   20933篇
  1993年   19748篇
  1992年   72098篇
  1991年   70161篇
  1990年   68477篇
  1989年   65774篇
  1988年   60390篇
  1987年   59214篇
  1986年   55291篇
  1985年   53082篇
  1984年   39362篇
  1983年   33436篇
  1982年   19879篇
  1979年   35869篇
  1978年   25596篇
  1977年   21146篇
  1976年   20269篇
  1975年   21763篇
  1974年   26104篇
  1973年   24779篇
  1972年   23196篇
  1971年   22035篇
  1970年   20236篇
  1969年   19298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