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   1679篇
  免费   103篇
  国内免费   12篇
耳鼻咽喉   3篇
儿科学   53篇
妇产科学   34篇
基础医学   157篇
口腔科学   84篇
临床医学   89篇
内科学   392篇
皮肤病学   65篇
神经病学   146篇
特种医学   56篇
外科学   412篇
综合类   5篇
一般理论   1篇
预防医学   61篇
眼科学   12篇
药学   80篇
中国医学   2篇
肿瘤学   142篇
  2023年   19篇
  2022年   33篇
  2021年   48篇
  2020年   21篇
  2019年   43篇
  2018年   57篇
  2017年   54篇
  2016年   42篇
  2015年   54篇
  2014年   67篇
  2013年   87篇
  2012年   114篇
  2011年   96篇
  2010年   42篇
  2009年   51篇
  2008年   103篇
  2007年   101篇
  2006年   99篇
  2005年   96篇
  2004年   88篇
  2003年   91篇
  2002年   66篇
  2001年   49篇
  2000年   43篇
  1999年   36篇
  1998年   15篇
  1997年   8篇
  1996年   9篇
  1995年   12篇
  1994年   8篇
  1993年   3篇
  1992年   18篇
  1991年   16篇
  1990年   19篇
  1989年   12篇
  1988年   12篇
  1987年   7篇
  1986年   11篇
  1985年   9篇
  1984年   2篇
  1983年   2篇
  1982年   5篇
  1981年   7篇
  1980年   4篇
  1979年   3篇
  1977年   2篇
  1973年   2篇
  1970年   2篇
  1969年   1篇
  1968年   1篇
排序方式: 共有1794条查询结果,搜索用时 15 毫秒
51.
52.

Introduction

There is evidence to suggest that an association exists between oral infections and coronary heart disease (CHD). Subjects presenting lesions of endodontic origin (LEOs) or pulpal inflammation had an increased risk of developing CHD. However, findings concerning systemic manifestations of apical periodontitis (AP) remain controversial. An association between CD14 gene polymorphisms and atherosclerosis-associated diseases has been shown, but there are no data regarding an association between CD14 polymorphism and AP. This study evaluated associations between clinical oral health status, CD14 polymorphisms, and CHD.

Methods

A case-controlled clinical trial was designed to compare middle-aged adults with acute myocardial infarction or unstable angina (n = 51) within 12 months of the acute event defined as first manifestation with healthy controls (n = 49). Participants were matched for age, sex, and socioeconomic status. Indicators of oral disease and compliance were evaluated. CD14 polymorphisms were analyzed by restriction fragment length polymorphism–polymerase chain reaction.

Results

CHD subjects had a higher prevalence of oral diseases and lower compliance to oral preventive strategies than healthy controls. Multivariate analysis showed a positive association between missing teeth (odds ratio [OR] = 1.37; 95% confidence interval [CI], 1.02–1.85), the number of LEOs (OR = 4.37; 95% CI, 1.69–11.28), chronic periodontitis (OR = 5.87; 95% CI, 1.17–29.4), and CHD. No statistically significant association emerged between the CD14 C(−260)T and the CD14 C(−159)T polymorphism, endodontic or periodontal disease, and CHD.

Conclusions

Chronic oral diseases may increase the risk of CHD and may be an unconventional risk factor for CHD.  相似文献   
53.
Neurological Sciences - Individuals experienced psychological symptoms in response to quarantine for the COVID-19 pandemic. Therefore, we aimed to investigate the possible effect of age...  相似文献   
54.
Testicular cancer (TC) is the most common solid cancer in men between the third and fourth decade of life. Due to successful treatment approaches, TC survivors (TCSs) have long life expectancy, but with numerous potential long-term sequelae, including sexual dysfunction. We investigated predictors of long-term normal sexual function (SF) recovery in TCSs. Sociodemographic, medical, and psychometric data were analyzed in 143 Caucasian-European TCSs, who underwent orchiectomy at a single institution. Health-significant comorbidities were scored with the Charlson Comorbidity Index (CCI). Patients completed the International Index of Erectile Function (IIEF). Statistical models tested the association between predictors (including age at surgery, body mass index, CCI, and adjuvant therapy: radiotherapy [RT], chemotherapy [CT], CT followed by retroperitoneal lymph node dissection [RPLND] and RPLND alone) and the long-term recovery of normal SF (defined as IIEF-erectile function [EF] ≥26, and sexual desire [SD], intercourse satisfaction [IS] orgasmic function [OF], and overall satisfaction [OS] domain scores in the upper tertiles). At a mean follow-up of 86 months, 35 (25.5%) TCSs had erectile dysfunction (ED), with 16 (11.2%) experiencing severe ED. Median time of EF recovery was 60, 60, and 70 months after CT, RT, and RPLND, respectively. Only adjuvant RT emerged as an independent predictor of nonrecovery of normal EF (HR: 0.55, P= 0.01). Neither adjuvant CT nor CT plus RPLND or RPLND alone significantly impaired the recovery of normal erections. Adjuvant therapy was not associated with impaired recovery of normal sexuality as a whole, considering the IIEF-SD, -OF, -IS, and OS domains.  相似文献   
55.
56.
ObjectivesTo test the hypothesis that patients with widespread high grade prostatic intra epithelial neoplasia (wHGPIN) and metabolic syndrome (MetS) are at a higher risk of prostate cancer (PCa) at a repeat biopsy.Methods and MaterialsWe prospectively evaluated 161 patients submitted from December 2004 to December 2011 to prostate rebiopsy after a initial diagnosis of HGPIN in a tertiary academic center. A 12 core biopsy template was used for all the biopsies. Rebiopsy was performed six months after the initial biopsy independently from PSA level and the DRE finding. wHGPIN was defined as≥4 biopsy cores involved. MetS was defined according to the National Cholesterol Education Program’s Adult Treatment Panel III criteria.ResultsOverall, 64 patients (39.7%) presented wHGPIN and 97 isolated HGPIN (60.3%). MetS was found in 63 patients, 39.1% of the whole population. Out of them 16 (25.3%) and 47 (74.7%) patients had a diagnosis of isolated and wHGPIN (P = 0.001). PCa detection rate at repeat biopsy was significantly higher in patients with MetS and wHGPIN than in those with wHGPIN and no MetS (57.4% Vs 23.5%; P = 0.016). A logistic regression model confirmed that wHGPIN and MetS are independent risk factors of prostate cancer diagnosis (respectively: Odds ratio (OR) = 4.187, 95%CI: 1.65–10.57 p = 0.002 and OR=3.603, 95%CI: 1.41-9.19, p = 0.007).ConclusionPatients with MetS and wHGPIN are at a higher risk of PCa, therefore performing a new prostate biopsy in those patients should be recommended.  相似文献   
57.
58.
59.
Clinical Rheumatology - Biologic disease-modifying antirheumatic drugs (bDMARDs) play a pivotal role in the treatment of psoriatic arthritis (PsA). Despite this, their discontinuation due to...  相似文献   
60.
Restoring the bladder glycosaminoglycans layer has recently been introduced as prophylactic treatment for recurrent urinary tract infections. Herein, we analyze the latest main clinical and experimental studies to support this therapeutic option. An electronic research was carried out in the most common databases in order to identify any published studies. Retrieved studies were categorized as experimental or clinical according to their setting. For the clinical studies, the evidence level was assigned. A total of 13 laboratory studies showed how bladder glycosaminoglycans instillations act: attenuation of the inflammation process, reduction of bladder contraction amplitude and frequency, reduction of epithelium damage, and lower bacterial growth in urine and tissue samples. Likewise, two randomized clinical trials with grade 2 evidence level and two case series with grade 4 evidence level reported glycosaminoglycans as an alternative to reduce episodes and to prolong recurrence time in patients with recurrent urinary tract infections. At least 12 months of follow up was completed. No serious adverse events were reported. Compared with a placebo, in one randomized study a significantly higher maximum cystometric capacity was obtained, whereas in the other study a significant increase in quality of life scores was reported too. An improvement in the urinary symptoms score was reported by the two randomized trials. Although the clinical use of glycosaminoglycans replacement therapy for recurrent urinary tract infections is supported by a small number of clinical studies with different evidence levels, the laboratory studies show that glycosaminoglycans could have a protective role against inflammatory factors, supporting the idea “to restore the glycosaminoglycans bladder layer to prevent chronic disease course”.  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