全文获取类型
收费全文 | 3062篇 |
免费 | 164篇 |
国内免费 | 7篇 |
专业分类
耳鼻咽喉 | 14篇 |
儿科学 | 71篇 |
妇产科学 | 92篇 |
基础医学 | 264篇 |
口腔科学 | 121篇 |
临床医学 | 260篇 |
内科学 | 560篇 |
皮肤病学 | 31篇 |
神经病学 | 265篇 |
特种医学 | 164篇 |
外科学 | 413篇 |
综合类 | 49篇 |
预防医学 | 430篇 |
眼科学 | 26篇 |
药学 | 82篇 |
中国医学 | 3篇 |
肿瘤学 | 388篇 |
出版年
2023年 | 120篇 |
2022年 | 149篇 |
2021年 | 206篇 |
2020年 | 298篇 |
2019年 | 147篇 |
2018年 | 135篇 |
2017年 | 151篇 |
2016年 | 137篇 |
2015年 | 141篇 |
2014年 | 301篇 |
2013年 | 191篇 |
2012年 | 122篇 |
2011年 | 94篇 |
2010年 | 197篇 |
2009年 | 172篇 |
2008年 | 70篇 |
2007年 | 83篇 |
2006年 | 63篇 |
2005年 | 42篇 |
2004年 | 25篇 |
2003年 | 23篇 |
2002年 | 36篇 |
2001年 | 27篇 |
2000年 | 28篇 |
1999年 | 39篇 |
1998年 | 23篇 |
1997年 | 26篇 |
1996年 | 31篇 |
1995年 | 16篇 |
1994年 | 9篇 |
1993年 | 9篇 |
1992年 | 6篇 |
1991年 | 11篇 |
1990年 | 7篇 |
1989年 | 8篇 |
1988年 | 14篇 |
1987年 | 8篇 |
1986年 | 9篇 |
1985年 | 9篇 |
1984年 | 8篇 |
1983年 | 9篇 |
1982年 | 6篇 |
1981年 | 4篇 |
1980年 | 4篇 |
1978年 | 2篇 |
1977年 | 3篇 |
1974年 | 5篇 |
1971年 | 2篇 |
1964年 | 1篇 |
1936年 | 3篇 |
排序方式: 共有3233条查询结果,搜索用时 15 毫秒
1.
2.
3.
4.
《Journal of the American Medical Directors Association》2020,21(4):531-537.e1
ObjectiveHospitalization-associated disability [HAD, ie, the loss of ability to perform ≥1 basic activities of daily living (ADLs) independently at discharge] is a frequent condition among older patients. The present study assessed whether a simple inpatient exercise program decreases HAD incidence in acutely hospitalized very old patients.DesignIn this randomized controlled trial (Activity in Geriatric Acute Care) participants were assigned to a control or intervention group and were assessed at baseline, admission, discharge, and 3 months thereafter.Setting and ParticipantsIn total, 268 patients (mean age 88 years, range 75–102) admitted to an acute care for older patients unit of a public hospital were randomized to a control (n = 125) or intervention (exercise) group (n = 143).MethodsBoth groups received usual care, and patients in the intervention group also performed simple supervised exercises (walking and rising from a chair, for a total duration of ∼20 minutes/day). We measured ADL function (Katz index) and incident HAD at discharge and after 3 months (primary outcome) and Short Physical Performance Battery, ambulatory capacity, number of falls, rehospitalization, and death during a 3-month follow-up (secondary outcomes).ResultsMedian duration of hospitalization was 7 days (interquartile range 4 days). The intervention group had a lower risk of HAD with reference to both baseline [odds ratio (OR) 0.36; 95% confidence interval (CI) 0.17–0.76, P = .007] and admission (OR 0.29; 95% CI 0.10–0.89, P = .030). A trend toward an improved ADL function at discharge vs admission was found in the intervention group compared with controls (OR 0.32; 95% CI ‒0.04 to 0.68; P = .083). No between-group differences were noted for the other endpoints (all P > .05).Conclusion and ImplicationsA simple inpatient exercise program decreases risk of HAD in acutely hospitalized, very old patients. 相似文献
5.
6.
7.
8.
9.
10.
ObjectiveTo develop a trail running injury screening instrument (TRISI) for utilisation as clinical decision aid in determining if a trail runner is at an increased risk for injury.DesignMultiple methods approach.MethodsThe study utilised five phases 1) identification of injury risk factors 2) determining the relevance of each identified risk factor in a trail running context, 3) creating the content of the Likert scale points from 0 to 4, 4) rescaling the Likert scale points to determine numerical values for the content of each Likert scale point, and 5) determining a weighted score for each injury risk factor that contributes to the overall combined composite score.ResultsOf the 77 identified injury risk factors, 26 were deemed relevant in trail running. The weighted score for each injury risk factor ranged from 2.21 to 5.53 with the highest calculated score being 5.53. The final TRISI includes risk categories of training, running equipment, demographics, previous injury, behavioural, psychological, nutrition, chronic disease, physiological, and biomechanical factors.ConclusionThe developed TRISI aims to assist the clinician during pre-race injury screening or during a training season to identify meaningful areas to target in designing injury risk management strategies and/or continuous health education. 相似文献