全文获取类型
收费全文 | 1162篇 |
免费 | 76篇 |
国内免费 | 1篇 |
专业分类
耳鼻咽喉 | 3篇 |
儿科学 | 49篇 |
妇产科学 | 24篇 |
基础医学 | 134篇 |
口腔科学 | 19篇 |
临床医学 | 107篇 |
内科学 | 199篇 |
皮肤病学 | 28篇 |
神经病学 | 73篇 |
特种医学 | 83篇 |
外科学 | 272篇 |
综合类 | 18篇 |
预防医学 | 72篇 |
眼科学 | 14篇 |
药学 | 91篇 |
肿瘤学 | 53篇 |
出版年
2022年 | 11篇 |
2021年 | 31篇 |
2020年 | 13篇 |
2019年 | 30篇 |
2018年 | 24篇 |
2017年 | 16篇 |
2016年 | 20篇 |
2015年 | 15篇 |
2014年 | 18篇 |
2013年 | 34篇 |
2012年 | 35篇 |
2011年 | 46篇 |
2010年 | 33篇 |
2009年 | 36篇 |
2008年 | 41篇 |
2007年 | 41篇 |
2006年 | 44篇 |
2005年 | 31篇 |
2004年 | 32篇 |
2003年 | 28篇 |
2002年 | 35篇 |
2001年 | 35篇 |
2000年 | 26篇 |
1999年 | 36篇 |
1998年 | 20篇 |
1997年 | 22篇 |
1996年 | 17篇 |
1995年 | 13篇 |
1993年 | 11篇 |
1992年 | 30篇 |
1991年 | 33篇 |
1990年 | 29篇 |
1989年 | 30篇 |
1988年 | 24篇 |
1987年 | 31篇 |
1986年 | 13篇 |
1985年 | 21篇 |
1984年 | 13篇 |
1983年 | 9篇 |
1982年 | 11篇 |
1981年 | 11篇 |
1980年 | 16篇 |
1979年 | 25篇 |
1978年 | 10篇 |
1977年 | 12篇 |
1976年 | 10篇 |
1974年 | 16篇 |
1971年 | 10篇 |
1968年 | 12篇 |
1967年 | 11篇 |
排序方式: 共有1239条查询结果,搜索用时 15 毫秒
31.
Jonathan L. Gleason Holly E. Richter David T. Redden Patricia S. Goode Kathryn L. Burgio Alayne D. Markland 《International urogynecology journal》2013,24(2):295-302
Introduction and hypothesis
The goal of this study was to characterize associations between caffeine consumption and severity of urinary incontinence (UI) in US women. We hypothesized that moderate and high caffeine intake would be associated with UI in US women when controlling for other factors associated with UI.Methods
US women participated in the 2005–2006 and 2007–2008 National Health and Nutrition Examination Survey (NHANES), a cross-sectional, nationally representative survey. Using the Incontinence Severity Index, UI was categorized as “any” and “moderate/severe”. Types of UI included stress, urge, mixed, and other. Food diaries were completed, and average water (grams/day), total dietary moisture (grams/day), and caffeine (milligrams/day) intake were calculated into quartiles. Stepwise logistic regression models were constructed adjusting for sociodemographics, chronic diseases, body mass index, self-rated health, depression, physical activity, alcohol use, dietary water and moisture intake, and reproductive factors.Results
From the 4,309 nonpregnant women (aged ≥20 years) who had complete UI and dietary data, UI prevalence for any UI was 41.0 % and 16.5 % for moderate/severe UI, with stress UI the most common type (36.6 %). Women consumed a mean caffeine intake of 126.7 mg/day. After adjusting for multiple factors, caffeine intake in the highest quartile (≥204 mg/day) was associated with any UI [prevalence odds ratio (POR) 1.47, 95 % confidence interval (CI) 1.07–2.01], but not moderate/severe UI (POR 1.42, 95 % CI 0.98–2.07). Type of UI (stress, urgency, mixed) was not associated with caffeine intake.Conclusions
Caffeine intake ≥204 mg/day was associated with any UI but not with moderate/severe UI in US women. 相似文献32.
Long‐Term Trajectories of PTSD in Vietnam‐Era Veterans: The Course and Consequences of PTSD in Twins
下载免费PDF全文
![点击此处可从《Journal of traumatic stress》网站下载免费的PDF全文](/ch/ext_images/free.gif)
Kathryn M. Magruder Jack Goldberg Christopher W. Forsberg Matthew J. Friedman Brett T. Litz Viola Vaccarino Patrick J. Heagerty Theresa C. Gleason Grant D. Huang Nicholas L. Smith 《Journal of traumatic stress》2016,29(1):5-16
We estimated the temporal course of posttraumatic stress disorder (PTSD) in Vietnam‐era veterans using a national sample of male twins with a 20‐year follow‐up. The complete sample included those twins with a PTSD diagnostic assessment in 1992 and who completed a DSM‐IV PTSD diagnostic assessment and a self‐report PTSD checklist in 2012 (n = 4,138). Using PTSD diagnostic data, we classified veterans into 5 mutually exclusive groups, including those who never had PTSD, and 4 PTSD trajectory groups: (a) early recovery, (b) late recovery, (c) late onset, and (d) chronic. The majority of veterans remained unaffected by PTSD throughout their lives (79.05% of those with theater service, 90.85% of those with nontheater service); however, an important minority (10.50% of theater veterans, 4.45% of nontheater veterans) in 2012 had current PTSD that was either late onset (6.55% theater, 3.29% nontheater) or chronic (3.95% theater, 1.16% nontheater). The distribution of trajectories was significantly different by theater service (p < .001). PTSD remains a prominent issue for many Vietnam‐era veterans, especially for those who served in Vietnam. 相似文献
33.
34.
James A. Brown MA George J. Arnaoutakis MD Arman Kilic MD Thomas G. Gleason MD Edgar Aranda-Michel BS Ibrahim Sultan MD 《Journal of cardiac surgery》2020,35(9):2331-2337
Within the spectrum of acute aortic syndromes, intramural hematoma (IMH) is a distinct lesion that is characterized by crescentic or circumferential thickening of the aortic wall in the absence of an intimal defect. The reported incidence of IMH among all type A acute aortic syndromes ranges from 3.5% to 28.3%. As compared with acute aortic dissection, IMH is a disease of the elderly, and it tends to have reduced rates of malperfusion syndromes, aortic insufficiency, and root dilation, yet also tends to have increased rates of pericardial effusion, cardiac tamponade, and periaortic hematoma. With respect to natural history, IMH may progress to classic dissection, frank rupture, or aneurysmal dilation; yet, IMH may also regress and be completely resorbed. However, studies disagree over the rates of progression or regression; as such, few studies agree on the short-term and long-term prognosis associated with IMH. American and European guidelines advocate emergent surgery for all acutely presenting type A IMH. At a minimum, supracoronary replacement of the aorta with hemiarch reconstruction is the preferred extent of operative repair to reduce rates of long-term reintervention for disease progression. However, valve and/or root procedures may be necessary proximally, while total arch reconstruction or hybrid procedures for the descending aorta may be necessary distally. Much remains unknown for IMH, including the ideal extent of aortic repair, risk-stratification for elderly patients, and the optimal treatment paradigm for stable, uncomplicated IMH. As such, IMH remains a diagnostic and therapeutic challenge for the cardiovascular surgeon. 相似文献
35.
36.
37.
38.
Jack Goldberg Kathryn M. Magruder Christopher W. Forsberg Lewis E. Kazis T. Bedirhan Üstün Matthew J. Friedman Brett T. Litz Viola Vaccarino Patrick J. Heagerty Theresa C. Gleason Grant D. Huang Nicholas L. Smith 《Quality of life research》2014,23(5):1579-1591
Purpose
To assess the relationship of posttraumatic stress disorder (PTSD) with health functioning and disability in Vietnam-era Veterans.Methods
A cross-sectional study of functioning and disability in male Vietnam-era Veteran twins. PTSD was measured by the Composite International Diagnostic Interview; health functioning and disability were assessed using the Veterans RAND 36-Item Health Survey (VR-36) and the World Health Organization Disability Assessment Schedule 2.0 (WHODAS 2.0). All data collection took place between 2010 and 2012.Results
Average age of the 5,574 participating Veterans (2,102 Vietnam theater and 3,472 non-theater) was 61.0 years. Veterans with PTSD had poorer health functioning across all domains of VR-36 and increased disability for all subscales of WHODAS 2.0 (all p < .001) compared with Veterans without PTSD. Veterans with PTSD were in poorer overall health on the VR-36 physical composite summary (PCS) (effect size = 0.31 in theater and 0.47 in non-theater Veterans; p < .001 for both) and mental composite summary (MCS) (effect size = 0.99 in theater and 0.78 in non-theater Veterans; p < .001 for both) and had increased disability on the WHODAS 2.0 summary score (effect size = 1.02 in theater and 0.96 in non-theater Veterans; p < .001 for both). Combat exposure, independent of PTSD status, was associated with lower PCS and MCS scores and increased disability (all p < .05, for trend). Within-pair analyses in twins discordant for PTSD produced consistent findings.Conclusions
Vietnam-era Veterans with PTSD have diminished functioning and increased disability. The poor functional status of aging combat-exposed Veterans is of particular concern. 相似文献39.
40.
Norihiko Kamioka Vasilis Babaliaros Michael Andrew Morse Tiberio Frisoli Stamatios Lerakis Jose Miguel Iturbe Jose Binongo Frank Corrigan Altayyeb Yousef Patrick Gleason John A. Wells Hope Caughron Andy Dong Evelio Rodriguez Bradley Leshnower William O’Neill Gaetano Paone Marvin Eng Adam Greenbaum 《JACC: Cardiovascular Interventions》2018,11(12):1131-1138