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   4953篇
  免费   754篇
  国内免费   32篇
耳鼻咽喉   63篇
儿科学   76篇
妇产科学   106篇
基础医学   553篇
口腔科学   79篇
临床医学   626篇
内科学   1446篇
皮肤病学   76篇
神经病学   440篇
特种医学   134篇
外科学   587篇
综合类   81篇
一般理论   3篇
预防医学   652篇
眼科学   34篇
药学   138篇
中国医学   4篇
肿瘤学   641篇
  2024年   16篇
  2023年   91篇
  2022年   66篇
  2021年   157篇
  2020年   141篇
  2019年   114篇
  2018年   166篇
  2017年   132篇
  2016年   176篇
  2015年   200篇
  2014年   277篇
  2013年   358篇
  2012年   254篇
  2011年   228篇
  2010年   220篇
  2009年   284篇
  2008年   235篇
  2007年   222篇
  2006年   233篇
  2005年   212篇
  2004年   179篇
  2003年   158篇
  2002年   129篇
  2001年   149篇
  2000年   108篇
  1999年   98篇
  1998年   71篇
  1997年   54篇
  1996年   58篇
  1995年   42篇
  1994年   49篇
  1993年   22篇
  1992年   63篇
  1991年   66篇
  1990年   59篇
  1989年   51篇
  1988年   38篇
  1987年   46篇
  1986年   40篇
  1985年   47篇
  1984年   36篇
  1983年   35篇
  1982年   32篇
  1981年   32篇
  1980年   21篇
  1979年   28篇
  1978年   17篇
  1972年   16篇
  1937年   41篇
  1936年   38篇
排序方式: 共有5739条查询结果,搜索用时 15 毫秒
981.
982.
983.
984.

Context

Chemotherapy-induced peripheral neuropathy (CIPN) is a common side effect of cancer treatment and may adversely affect quality of life (QOL) for years.

Objectives

We explored the long-term effects of electroencephalographic neurofeedback (NFB) as a treatment for CIPN and other aspects of QOL.

Methods

Seventy-one cancer survivors (mean age 62.5; 87% females) with CIPN were randomized to NFB or to a waitlist control (WLC) group. The NFB group underwent 20 sessions of NFB where rewards were given for voluntary changes in electroencephalography. Measurements of pain, cancer-related symptoms, QOL, sleep, and fatigue were obtained at baseline, end of treatment, and one and four months later.

Results

Seventy one participants enrolled in the study. At the end of treatment, 30 in the NFB group and 32 in the WLC group completed assessments; at four months, 23 in the NFB group and 28 in the WLC completed assessments. Linear mixed model analysis revealed significant group × time interaction for pain severity. A general linear model determined that the NFB group had greater improvements in worst pain (primary outcome) and other symptoms such as numbness, cancer-related symptom severity, symptom interference, physical functioning, general health, and fatigue compared with the WLC group at the end of treatment and four months (all P < 0.05). Effect sizes were moderate or large for most measures.

Conclusion

NFB appears to result in long-term reduction in multiple CIPN symptoms and improved postchemotherapy QOL and fatigue.  相似文献   
985.

Aim

To examine the impact of patient characteristics, anthropometric measurement and patient clinical variables on their appraisal of treatment satisfaction and well‐being.

Background

Treatment satisfaction and well‐being are instrumental in achieving diabetes care goals. Nursing practices and healthcare policies may inform interventions in these areas.

Introduction

The prevalence of diabetes is high in the Middle East. An understanding of relationships between clinical and socio‐demographic variables and well‐being and treatment satisfaction is needed to improve care and patient outcomes.

Methods

A total of 1002 patients completed tools measuring well‐being, treatment satisfaction and socio‐demographic characteristics. A series of bivariate and multivariate analysis were conducted to identify factors associated with well‐being and treatment satisfaction.

Results

Males reported better treatment satisfaction and well‐being than females. Older participants, those who were compliant to diet, with controlled diabetes, and no neuropathy reported higher treatment satisfaction scores and well‐being scores. Insulin therapy was associated with better treatment satisfaction.

Discussion

Females, participants who were not prescribed diabetic diets and those with complications were more likely to be negatively impacted by diabetes. Individuals with diabetes who were treated with insulin had higher treatment satisfaction than those who used oral hypoglycaemic agents.

Conclusion and implication for nursing and health policy

These findings are important in assisting nurses and other healthcare professionals in identifying patients with diabetes with low treatment satisfaction who may present a greater risk for poor well‐being. Additionally, they lend support to developing policies for frequent screenings and special therapeutic interventions that are needed to maximize patients’ treatment satisfaction and well‐being in the Middle East and elsewhere.  相似文献   
986.
The overall purpose of this paper is to describe the process of utilizing community participation for curriculum design to develop a new school of nursing. A brief Community Needs Assessment Survey was carried out in order to explore community perceptions and expectations of Baccalaureate-prepared nurses in Jordan. The sample consisted of 152 participants who were staff nurses, nurse administrators, nurse supervisors, nurse educators, physicians, pharmacists and consumers of services. Data were collected through a self-administered survey form using open-ended questions. Participants were asked to describe their perceptions of nursing and nurses, the desired professional skills and personal characteristics of the Baccalaureate-prepared nurse, important curriculum contents and to provide suggestions or comments for improving the preparation of Bachelor of Science in Nursing (BSN) nurses. The findings indicated that nursing was viewed as a caring profession where nurses care for the person both in sickness and health. Several professional skills and personal characteristics emerged as being important for the BSN nurse, including clinical competence, the desire to continue learning, communication skills, ethical and moral character, critical thinking, assessment skills, and computer and English-language skills. The participants provided the desired curriculum contents and suggestions related to the expected skills. Implications for nursing education were discussed.  相似文献   
987.
Imaging of neuroendocrine tumors: accuracy of helical CT versus SRS   总被引:5,自引:0,他引:5  
Background: We retrospectively compared the accuracy of somatostatin receptor scintigraphy (SRS) with that of helical computed tomography (CT) in the detection and localization of primary and metastatic neuroendocrine tumors.Methods: A medical record search identified 27 patients with known or clinically suspected neuroendocrine tumors who underwent helical CT and SRS within 3 months of one another at our institution. CT images were evaluated retrospectively by two blinded radiologists who used consensus reading. Images were evaluated for the presence or absence of primary tumor and hepatic and extrahepatic metastases. CT results were compared with the SRS report as interpreted by the nuclear medicine physicians. The results of the surgical, clinical follow-up, and pathologic findings were considered as the gold standard. Sensitivity, specificity, and accuracy were calculated for both imaging techniques. In addition, McNemar analysis was performed to determine statistically significant differences between CT and SRS.Results: Helical CT was more sensitive than SRS in the detection of extrahepatic metastases, and the difference between the two imaging modalities was statistically significant (p = 0.0312) as determined by the McNemar chi-square test. However, the difference between CT and SRS in detecting primary neuroendocrine tumors, hepatic metastasis, and combined hepatic and extrahepatic metastasis was not statistically significant (p = 0.625, 1.000, and 1.000, respectively).Conclusion: Helical CT and SRS have similar sensitivity, specificity, and accuracy in detecting primary neuroendocrine tumor and hepatic metastasis. However, helical CT appears to be more sensitive in detecting extrahepatic metastasis from primary neuroendocrine tumors.  相似文献   
988.

Objective

This study aims to know if the level of S100B protein at the initiation of cardiopulmonary resuscitation (CPR) and immediately after return of spontaneous circulation (ROSC) can predict clinical outcome.

Materials and methods

A prospective observational study from December 2004 to October 2006 was conducted in an urban tertiary hospital emergency department. Clinical demographics for out-of-hospital cardiac arrest patients were collected based on the Utstein style. Outcomes collected included ROSC for 20 min, survival to admission, survival and Glasgow Outcome Scale (GOS) at 1 month. S100B protein was measured twice before starting CPR (first S100B) and immediately after ROSC (second S100B). We investigated the association between S100B protein levels and clinical outcomes using a multivariate logistic regression model.

Results

A total of 151 patients were included (age: 60.2 ± 16.8 years, male: 64.2%). Of these, 60 (39.7%) had ROSC and 46 (30.5%) survived to admission. After 1 month, 12 (8.0%) survived and only three patients showed good GOS (≥4 points). The S100B levels were not different for ROSC, survival to admission and 1-month survival between survivors and non-survivors (p > 0.05, first and second S100 B level). For the witnessed out-of-hospital cardiac arrest (OHCA) group (N = 87), only the first S100B (1.22 ± 0.85 μg l−1 vs. 3.91 ± 4.25 μg l−1, p < 0.001) showed significant difference for 1-month survival between survivors and non-survivors. The first S100B showed significant association with survival to emergency department (ED) but not 1-month survival (adjusted odds ratio (OR) = 0.905, 95% confidence interval = 0.821-0.998).

Conclusion

Higher levels of S100B at start of CPR were significantly associated with lower survival to admission, and not for 1-month survival.  相似文献   
989.
Every day, thousands of physical therapists and rehabilitation nurses are required to perform physically demanding therapeutic patient handling tasks that are stressful to the caregiver and increase his or her risk of developing work‐related musculoskeletal disorders (MSDs). In rehabilitation, patient handling tasks might be classified as “traditional” or “therapeutic.” Traditional tasks have a practical goal, such as transferring a patient from bed to a wheelchair, and therapeutic tasks have more targeted goals such as facilitating patient function and independence. Therapeutic patient handling tasks present a greater risk for caregivers to sustain work‐related MSDs than typical patient handling tasks do because caregivers are exposed to high mechanical loads on the spinal tissues for longer amounts of time. The Veterans Health Administration, Association of Rehabilitation Nurses, and the American Physical Therapy Association endorse the use of modern patient handling technology as part of a comprehensive safe patient handling program for providing therapy in rehabilitation settings. Information about patient handling technology that is effective in reducing the risk of work‐related MSDs from performing therapeutic patient handling and movement tasks is also presented and discussed in this article.  相似文献   
990.
(Headache 2010;50:588‐599) Background.— Data on the association between the MTHFR 677C>T and ACE D/I polymorphisms and migraine including aura status are conflicting. Objective.— The objective of this study is to perform a systematic review and meta‐analysis on this topic. Methods.— We searched for studies published until March 2009 using electronic databases (MEDLINE, EMBASE, Science Citation Index) and reference lists of studies and reviews on the topic. Assessment for eligibility of studies and extraction of data was performed by 2 independent investigators. For each study we calculated the odds ratios (OR) and 95% confidence intervals (CI) assuming additive, dominant, and recessive genetic models. We then calculated pooled ORs and 95% CIs. Results.— Thirteen studies investigated the association between the MTHFR 677C>T polymorphism and migraine. The TT genotype was associated with an increased risk for any migraine, which only appeared for migraine with aura (pooled OR = 1.48, 95% CI 1.02‐2.13), but not for migraine without aura. Nine studies investigated the association of the ACE D/I polymorphism with migraine. The II genotype was associated with a reduced risk for migraine with aura (pooled OR = 0.71, 95% CI 0.55‐0.93) and migraine without aura (pooled OR = 0.84, 95% CI 0.70‐0.99). Results for both variants were driven by studies in non‐Caucasian populations. Results among Caucasians did not suggest an association. Extractable data did not allow investigation of gene–gene interactions. Conslusions.— The MTHFR 677TT genotype is associated with an increased risk for migraine with aura, while the ACE II genotype is protective against both migraine with and without aura. Results for both variants appeared only among non‐Caucasian populations. There was no association among Caucasians.  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