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   3638篇
  免费   320篇
  国内免费   7篇
耳鼻咽喉   42篇
儿科学   127篇
妇产科学   77篇
基础医学   427篇
口腔科学   112篇
临床医学   490篇
内科学   555篇
皮肤病学   45篇
神经病学   564篇
特种医学   92篇
外科学   348篇
综合类   30篇
一般理论   11篇
预防医学   522篇
眼科学   34篇
药学   248篇
中国医学   6篇
肿瘤学   235篇
  2024年   12篇
  2023年   46篇
  2022年   71篇
  2021年   163篇
  2020年   114篇
  2019年   139篇
  2018年   160篇
  2017年   132篇
  2016年   112篇
  2015年   122篇
  2014年   134篇
  2013年   235篇
  2012年   275篇
  2011年   317篇
  2010年   174篇
  2009年   140篇
  2008年   227篇
  2007年   278篇
  2006年   233篇
  2005年   204篇
  2004年   178篇
  2003年   160篇
  2002年   139篇
  2001年   18篇
  2000年   16篇
  1999年   25篇
  1998年   27篇
  1997年   20篇
  1996年   15篇
  1995年   14篇
  1994年   8篇
  1993年   7篇
  1992年   4篇
  1991年   5篇
  1990年   8篇
  1989年   6篇
  1988年   5篇
  1987年   6篇
  1986年   2篇
  1985年   2篇
  1984年   3篇
  1983年   2篇
  1981年   1篇
  1977年   2篇
  1973年   1篇
  1972年   1篇
  1969年   1篇
  1968年   1篇
排序方式: 共有3965条查询结果,搜索用时 15 毫秒
101.
102.
103.

Background

Dietary habits and depression are associated with cardiovascular disease risk. Patients with depression often report poor eating habits, and dietary factors may help explain commonly observed associations between depression and cardiovascular disease.

MethodS

From 1996 to 2000, 936 women were enrolled in the Women's Ischemia Syndrome Evaluation at 4 US academic medical centers at the time of clinically indicated coronary angiography and then assessed (median follow-up, 5.9 years) for adverse outcomes (cardiovascular disease death, heart failure, myocardial infarction, stroke). Participants completed a protocol including coronary angiography (coronary artery disease severity) and depression assessments (Beck Depression Inventory scores, antidepressant use, and depression treatment history). A subset of 201 women (mean age, 58.5 years; standard deviation, 11.4) further completed the Food Frequency Questionnaire for Adults (1998 Block). We extracted daily fiber intake and daily servings of fruit and vegetables as measures of dietary habits.

Results

In separate Cox regression models adjusted for age, smoking, and coronary artery disease severity, Beck Depression Inventory scores (hazard ratio [HR], 1.05; 95% confidence interval [CI], 1.01-1.10), antidepressant use (HR, 2.4; 95% CI, 1.01-5.9), and a history of treatment for depression (HR, 2.4; 95% CI, 1.1-5.3) were adversely associated with time to cardiovascular disease outcomes. Fiber intake (HR, 0.87; 95% CI, 0.78-0.97) and fruit and vegetable consumption (HR, 0.36; 95% CI, 0.19-0.70) were associated with a decreased time to cardiovascular disease event risk. In models including dietary habits and depression, fiber intake and fruit and vegetable consumption remained associated with time to cardiovascular disease outcomes, whereas depression relationships were reduced by 10% to 20% and nonsignificant.

Conclusions

Among women with suspected myocardial ischemia, we observed consistent relationships among depression, dietary habits, and time to cardiovascular disease events. Dietary habits partly explained these relationships. These results suggest that dietary habits should be included in future efforts to identify mechanisms linking depression to cardiovascular disease.  相似文献   
104.
The current study examined correlates, moderators, and mediators of functional impairment in 98 treatment-seeking adults with obsessive–compulsive disorder (OCD). Participants completed or were administered measures assessing obsessive–compulsive symptom severity, functional impairment, resistance against symptoms, interference due to obsessive–compulsive symptoms, depressive symptoms, insight, and anxiety sensitivity. Results indicated that all factors, except insight into symptoms, were significantly correlated with functional impairment. The relationship between obsessive–compulsive symptom severity and functional impairment was not moderated by patient insight, resistance against obsessive–compulsive symptoms, or anxiety sensitivity. Mediational analyses indicated that obsessive–compulsive symptom severity mediated the relationship between anxiety sensitivity and obsessive–compulsive related impairment. Indeed, anxiety sensitivity may play an important contributory role in exacerbating impairment through increases in obsessive–compulsive symptom severity. Depressive symptoms mediated the relationship between obsessive–compulsive symptom severity and obsessive–compulsive related impairment. Implications for assessment and treatment are discussed.  相似文献   
105.
106.
A cross-sectional study was done on 100 consecutive paediatric patients presenting with acute encephalitis syndrome. The clinico-laboratory features of all patients were recorded in a prestructured performa. Cerebrospinal fluid and serum samples were tested for: Japanese encephalitis (JE) virus; Chandipura virus; coxsackie virus; dengue virus; enterovirus 76; and West Nile virus. Twenty-two (22.0%) patients were confirmed JE cases and 17% had parasitic or bacteriological aetiology. The remaining 61 cases (61.0%) in which no viral aetiological agent was found were grouped as non-JE cases. Peripheral vascular failure, splenomegaly and hypotonia were distinguishing clinical features found in the non-JE patients. A high mortality of 26.5% was seen in patients with confirmed or presumptive viral encephalitis (22/83). A fatal outcome was independently associated with peripheral vascular failure and pallor at the time of admission. Early recognition of these signs may help clinicians to manage these cases.  相似文献   
107.
108.
109.
The curative potential of allogeneic haematopoietic stem cell transplant (allo HSCT) in chronic lymphocytic leukaemia CLL is established, with a demonstrated role for graft-versus-leukaemia and less certainty for other factors in determining outcome. The first two decades of CLL patients proceeding to allo HSCT at the Leukaemia/Bone Marrow Transplant Program of British Columbia (n = 49 consecutive, 1991-2009) were studied to clarify factors predicting outcome. The donor was related in 29 (59%) and unrelated in 20 (41%). Conditioning was reduced-intensity in 27 (55%) and myeloablative in 22 (45%). Thirty-one of 49 patients survive with median follow-up of 5 years (0·2-15). Cumulative incidence of non-relapse mortality; complete remission (CR); clearance of fluorescence in situ hybridization (FISH) abnormality and progression at 10 years was 36%; 69%; 55% and 22%. Overall survival (OS) was 63% at 2 years; 55% at 5 years and beyond. Factors predicting OS (P value by log rank <0·05) were: comorbidity index <3, FISH rank (Dohner) and 17p deletion, alemtuzumab pre-HSCT, achievement of CR post-HSCT, donor chimerism >90%, clearance of FISH abnormality post-HSCT and absence of high-grade (3-4) graft-versus-host disease. Results from this province-wide, two-decade cohort demonstrated that a substantial proportion of patients with high-risk CLL become long term disease-free survivors.  相似文献   
110.
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