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   8136篇
  免费   587篇
  国内免费   112篇
耳鼻咽喉   142篇
儿科学   74篇
妇产科学   116篇
基础医学   1405篇
口腔科学   156篇
临床医学   800篇
内科学   1579篇
皮肤病学   230篇
神经病学   693篇
特种医学   457篇
外科学   1018篇
综合类   28篇
预防医学   304篇
眼科学   125篇
药学   858篇
中国医学   154篇
肿瘤学   696篇
  2023年   43篇
  2022年   35篇
  2021年   290篇
  2020年   184篇
  2019年   237篇
  2018年   265篇
  2017年   257篇
  2016年   342篇
  2015年   558篇
  2014年   603篇
  2013年   620篇
  2012年   935篇
  2011年   887篇
  2010年   494篇
  2009年   402篇
  2008年   527篇
  2007年   461篇
  2006年   407篇
  2005年   310篇
  2004年   227篇
  2003年   197篇
  2002年   158篇
  2001年   92篇
  2000年   81篇
  1999年   58篇
  1998年   34篇
  1997年   17篇
  1996年   12篇
  1995年   13篇
  1994年   8篇
  1993年   14篇
  1992年   17篇
  1991年   10篇
  1990年   3篇
  1989年   6篇
  1988年   2篇
  1987年   4篇
  1986年   5篇
  1985年   5篇
  1984年   1篇
  1982年   1篇
  1981年   1篇
  1980年   1篇
  1979年   4篇
  1977年   1篇
  1974年   2篇
  1972年   1篇
  1969年   1篇
  1968年   1篇
  1967年   1篇
排序方式: 共有8835条查询结果,搜索用时 15 毫秒
1.
2.
3.
4.
5.

Background

The purpose of the study was to compare cancer detection rates between 12-core transrectal ultrasound-guided prostate biopsy (TRUS-Bx) and multiparametric magnetic resonance imaging (mpMRI)-guided target prostate biopsy (MRI-TBx) according to prostate-specific antigen (PSA) level in biopsy-naive patients.

Patients and Methods

A retrospective study was conducted in 2009 biopsy-naive patients with suspected prostate cancer (PSA ≤20 ng/mL). Patients underwent TRUS-Bx (n = 1786) or MRI-guided target prostate biopsy (MRI-TBx; n = 223) from September 2013 to March 2017 and were stratified according to each of 4 PSA cutoffs. MRI-TBx was performed on lesions with Prostate Imaging Reporting and Data System (PI-RADS) scores of 3 to 5 on mpMRI. Clinically significant prostate cancer (csPCa) was defined as Gleason ≥7. Propensity score matching was performed using the prebiopsy variables, which included age, PSA, prostate volume, and PSA density.

Results

Propensity score matching resulted in 222 patients in each group. There were significant differences between the TRUS-Bx and MRI-TBx groups in the overall detection rates of prostate cancer (41.4% vs. 55.4%; P = .003) and csPCa (30.1% vs. 42.8%; P = .005). However, across PSA cutoffs, MRI-TBx detected more prostate cancer than TRUS-Bx at PSA levels of 2.5 to <4 (29.5% vs. 56.6%; P < .001). The csPCa detection rates of TRUS-Bx and MRI-TBx did not differ significantly within the PSA cutoffs. There was a significantly higher detection rate of prostate cancer and csPCa in lesions with PI-RADS scores 4 and 5 than in those with a score of 3.

Conclusion

Prebiopsy mpMRI and subsequent targeted biopsy had a higher detection rate than TRUS-Bx in patients with prostate cancer and csPCa.  相似文献   
6.
7.
8.
While decreasing trend in gender differences in alcohol use disorders was reported in Western countries, the change in Asian countries is unknown. This study aims to explore the shifts in gender difference in alcohol abuse (AA) and dependence (AD) in Korea. We compared the data from two nation-wide community surveys to evaluate gender differences in lifetime AA and AD by Diagnostic and Statistical Manual of Mental Disorders, Fourth Edition (DSM-IV). Face-to-face interviews using the Composite International Diagnostic Interview (CIDI) were applied to all subjects in 2001 (n=6,220) and 2011 (n=6,022). Male-to-female ratio of odds was decreased from 6.41 (95% CI, 4.81-8.54) to 4.37 (95% CI, 3.35-5.71) for AA and from 3.75 (95% CI, 2.96-4.75) to 2.40 (95% CI, 1.80-3.19) for AD. Among those aged 18-29, gender gap even became statistically insignificant for AA (OR, 1.59; 95% CI, 0.97-2.63) and AD (OR, 1.18; 95% CI, 0.80-2.41) in 2011. Men generally showed decreased odds for AD (0.55; 95% CI, 0.45-0.67) and women aged 30-39 showed increased odds for AA (2.13; 95% CI 1.18-3.84) in 2011 compared to 2001. Decreased AD in men and increased AA in women seem to contribute to the decrease of gender gap. Increased risk for AA in young women suggests needs for interventions.  相似文献   
9.
10.
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