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   46462篇
  免费   7493篇
  国内免费   110篇
耳鼻咽喉   361篇
儿科学   1471篇
妇产科学   2170篇
基础医学   3709篇
口腔科学   549篇
临床医学   18568篇
内科学   6780篇
皮肤病学   553篇
神经病学   3376篇
特种医学   948篇
外国民族医学   1篇
外科学   4946篇
综合类   660篇
一般理论   23篇
预防医学   5022篇
眼科学   448篇
药学   2125篇
中国医学   45篇
肿瘤学   2310篇
  2023年   967篇
  2022年   369篇
  2021年   1001篇
  2020年   1030篇
  2019年   940篇
  2018年   1927篇
  2017年   1923篇
  2016年   1978篇
  2015年   2128篇
  2014年   2410篇
  2013年   3028篇
  2012年   2300篇
  2011年   2606篇
  2010年   2092篇
  2009年   2250篇
  2008年   2145篇
  2007年   2054篇
  2006年   2006篇
  2005年   1880篇
  2004年   1695篇
  2003年   1582篇
  2002年   1473篇
  2001年   1112篇
  2000年   842篇
  1999年   900篇
  1998年   805篇
  1997年   879篇
  1996年   861篇
  1995年   734篇
  1994年   575篇
  1993年   475篇
  1992年   598篇
  1991年   584篇
  1990年   597篇
  1989年   505篇
  1988年   401篇
  1987年   412篇
  1986年   340篇
  1985年   386篇
  1984年   307篇
  1983年   254篇
  1982年   217篇
  1981年   194篇
  1980年   167篇
  1979年   245篇
  1978年   200篇
  1977年   171篇
  1976年   164篇
  1974年   159篇
  1972年   158篇
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
1.
Patient navigation is a strategy for overcoming barriers to reduce disparities and to improve access and outcomes. The aim of this umbrella review was to identify, critically appraise, synthesize, and present the best available evidence to inform policy and planning regarding patient navigation across the cancer continuum. Systematic reviews examining navigation in cancer care were identified in the Cochrane Central Register of Controlled Trials (CENTRAL), PubMed, Embase, Cumulative Index of Nursing and Allied Health (CINAHL), Epistemonikos, and Prospective Register of Systematic Reviews (PROSPERO) databases and in the gray literature from January 1, 2012, to April 19, 2022. Data were screened, extracted, and appraised independently by two authors. The JBI Critical Appraisal Checklist for Systematic Review and Research Syntheses was used for quality appraisal. Emerging literature up to May 25, 2022, was also explored to capture primary research published beyond the coverage of included systematic reviews. Of the 2062 unique records identified, 61 systematic reviews were included. Fifty-four reviews were quantitative or mixed-methods reviews, reporting on the effectiveness of cancer patient navigation, including 12 reviews reporting costs or cost-effectiveness outcomes. Seven qualitative reviews explored navigation needs, barriers, and experiences. In addition, 53 primary studies published since 2021 were included. Patient navigation is effective in improving participation in cancer screening and reducing the time from screening to diagnosis and from diagnosis to treatment initiation. Emerging evidence suggests that patient navigation improves quality of life and patient satisfaction with care in the survivorship phase and reduces hospital readmission in the active treatment and survivorship care phases. Palliative care data were extremely limited. Economic evaluations from the United States suggest the potential cost-effectiveness of navigation in screening programs.  相似文献   
2.
3.
4.
5.
6.
7.
8.
9.
10.
Background A high Mandard score implies a non-response to chemotherapy in oesophageal adenocarcinoma. However, some patients exhibit tumour volume reduction and a nodal response despite a high score. This study examines survival and recurrence patterns in these patients.Methods Clinicopathological factors were analysed using multivariable Cox regression assessing time to death and recurrence. Computed tomography-estimated tumour volume change was examined in a subgroup of consecutive patients.Results Five hundred and fifty-five patients were included. Median survival was 55 months (Mandard 1–3) and 21 months (Mandard 4 and 5). In the Mandard 4 and 5 group (332 patients), comparison between complete nodal responders and persistent nodal disease showed improved survival (90 vs 18 months), recurrence rates (locoregional 14.75 vs 28.74%, systemic 24.59 vs 48.42%) and circumferential resection margin positivity (22.95 vs 68.11%). Complete nodal response independently predicted improved survival (hazard ratio 0.34 (0.16–0.74). Post-chemotherapy tumour volume reduction was greater in patients with a complete nodal response (−16.3 vs −7.7 cm3, p = 0.033) with no significant difference between Mandard groups.Conclusion Patients with a complete nodal response to chemotherapy have significantly improved outcomes despite a poor Mandard score. High Mandard score does not correspond with a non-response to chemotherapy in all cases and patients with nodal downstaging may still benefit from adjuvant chemotherapy.Subject terms: Oesophageal cancer, Surgical oncology  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