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   2359245篇
  免费   176083篇
  国内免费   3344篇
耳鼻咽喉   32121篇
儿科学   76182篇
妇产科学   62859篇
基础医学   350049篇
口腔科学   63869篇
临床医学   213064篇
内科学   458744篇
皮肤病学   51909篇
神经病学   186577篇
特种医学   88504篇
外国民族医学   489篇
外科学   355917篇
综合类   47626篇
现状与发展   12篇
一般理论   875篇
预防医学   184569篇
眼科学   54495篇
药学   176251篇
  9篇
中国医学   4599篇
肿瘤学   129952篇
  2021年   19346篇
  2019年   19871篇
  2018年   27448篇
  2017年   20659篇
  2016年   23070篇
  2015年   26077篇
  2014年   36653篇
  2013年   54719篇
  2012年   75900篇
  2011年   80713篇
  2010年   47804篇
  2009年   45229篇
  2008年   75758篇
  2007年   80721篇
  2006年   81447篇
  2005年   78922篇
  2004年   75481篇
  2003年   72720篇
  2002年   70279篇
  2001年   108855篇
  2000年   111536篇
  1999年   93621篇
  1998年   27166篇
  1997年   23772篇
  1996年   24160篇
  1995年   22805篇
  1994年   20984篇
  1993年   19786篇
  1992年   72046篇
  1991年   70106篇
  1990年   68419篇
  1989年   65693篇
  1988年   60316篇
  1987年   59154篇
  1986年   55241篇
  1985年   53029篇
  1984年   39333篇
  1983年   33423篇
  1982年   19873篇
  1979年   35869篇
  1978年   25659篇
  1977年   21238篇
  1976年   20338篇
  1975年   21821篇
  1974年   26149篇
  1973年   24805篇
  1972年   23202篇
  1971年   22037篇
  1970年   20233篇
  1969年   19285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