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   2346343篇
  免费   175141篇
  国内免费   3319篇
耳鼻咽喉   32081篇
儿科学   75921篇
妇产科学   62733篇
基础医学   348426篇
口腔科学   63658篇
临床医学   211189篇
内科学   456859篇
皮肤病学   51776篇
神经病学   185335篇
特种医学   88140篇
外国民族医学   489篇
外科学   354006篇
综合类   47481篇
现状与发展   12篇
一般理论   848篇
预防医学   182538篇
眼科学   54303篇
药学   175208篇
  9篇
中国医学   4577篇
肿瘤学   129214篇
  2021年   19014篇
  2019年   19559篇
  2018年   27084篇
  2017年   20379篇
  2016年   22787篇
  2015年   25668篇
  2014年   36144篇
  2013年   54031篇
  2012年   74765篇
  2011年   79515篇
  2010年   47129篇
  2009年   44635篇
  2008年   74725篇
  2007年   79576篇
  2006年   80386篇
  2005年   77858篇
  2004年   74453篇
  2003年   71787篇
  2002年   69447篇
  2001年   108789篇
  2000年   111489篇
  1999年   93553篇
  1998年   27016篇
  1997年   23682篇
  1996年   24068篇
  1995年   22733篇
  1994年   20907篇
  1993年   19731篇
  1992年   72049篇
  1991年   70090篇
  1990年   68426篇
  1989年   65693篇
  1988年   60324篇
  1987年   59150篇
  1986年   55245篇
  1985年   53036篇
  1984年   39335篇
  1983年   33412篇
  1982年   19877篇
  1979年   35881篇
  1978年   25669篇
  1977年   21247篇
  1976年   20347篇
  1975年   21829篇
  1974年   26164篇
  1973年   24817篇
  1972年   23224篇
  1971年   22059篇
  1970年   20259篇
  1969年   19320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