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   3119篇
  免费   512篇
  国内免费   6篇
耳鼻咽喉   35篇
儿科学   79篇
妇产科学   136篇
基础医学   168篇
口腔科学   153篇
临床医学   319篇
内科学   482篇
皮肤病学   33篇
神经病学   126篇
特种医学   49篇
外科学   360篇
综合类   12篇
一般理论   7篇
预防医学   994篇
眼科学   17篇
药学   71篇
中国医学   1篇
肿瘤学   595篇
  2024年   12篇
  2023年   208篇
  2022年   210篇
  2021年   322篇
  2020年   272篇
  2019年   272篇
  2018年   251篇
  2017年   199篇
  2016年   162篇
  2015年   173篇
  2014年   225篇
  2013年   263篇
  2012年   156篇
  2011年   163篇
  2010年   146篇
  2009年   169篇
  2008年   139篇
  2007年   77篇
  2006年   86篇
  2005年   42篇
  2004年   40篇
  2003年   30篇
  2002年   7篇
  2001年   8篇
  1999年   1篇
  1997年   1篇
  1996年   1篇
  1984年   2篇
排序方式: 共有3637条查询结果,搜索用时 15 毫秒
101.
ObjectivesBlack adults in the United States have shorter sleep durations and poorer sleep efficiency relative to White adults, yet reasons for these disparities are not well explicated. The objective of this study was to examine neighborhood safety in childhood as a mediator of subsequent racial disparities in sleep.MethodsData were from Black and White young adults attending a large, predominantly White university in the Southeastern United States (N = 263; 52% Black, 53% female; Mean age = 19.21 years, SD = 1.01). Sleep parameters were assessed from eight nights of wrist actigraphy (time in bed, sleep duration, and efficiency) and an established self-report measure of daytime sleepiness. Residential histories from birth through age 18 were documented, and retrospective self-reports of neighborhood safety in childhood were assessed.ResultsBlack participants had less time in bed (p < 0.001), shorter sleep duration (p < 0.001), poorer sleep efficiency (p < 0.001), and more daytime sleepiness (p = 0.009) than White participants. Neighborhood safety mediated race differences in time in bed (p = 0.028), sleep duration (p = 0.033), and daytime sleepiness (p = 0.048), but not sleep efficiency. Findings were substantively unchanged after adjustment for family socioeconomic status, BMI, and substance use.ConclusionsFindings support the hypothesis that neighborhood safety in childhood may partially account for race differences in subsequent sleep duration and daytime sleepiness. Addressing racial inequities in childhood neighborhood safety may be an important step toward reducing racial disparities in sleep health.  相似文献   
102.
This study aims to understand the health correlates of sleep deficiencies in non-elderly U.S. Hispanic1 women. Data from a sample of U.S. Hispanic women (n = 1531; ages 18–65 [M = 39.98; SD = 12.85]) who completed the 2017 National Health Interview Survey were analyzed to understand (1) sleep duration and quality; (2) the association of sleep patterns with key health indicators; and (3) whether these relationships are mediated by health behaviors (ie, healthy eating and physical activity). Shorter sleep duration was associated with a higher likelihood of often feeling anxious and having hypertension. Worse sleep quality was associated with a higher likelihood of being overweight, having fair or poor health status, often feeling depressed, often feeling anxious, having high cholesterol, and having asthma. Doctor's recommendation to engage in physical activity and to decrease calorie intake served as mediators in some of these relationships. Results indicate that among Hispanic women: (1) sleep is an important determinant of a variety of health outcomes and (2) the association of sleep and many health outcomes are mediated by healthy eating and physical activity. Further research on the association of sleep and risk of chronic disease among Hispanic women is needed.  相似文献   
103.
Access to dental care continues to be a challenge for millions of vulnerable Americans. In more than 50 nations worldwide, dental therapists (DTs), mid‐level providers who deliver a limited scope of dental care under the supervision of a dentist, have helped increase access to needed care. Since 2003, when the Alaska Native Tribal Health System introduced DTs as part of the Federally authorized Alaska Community Health Aide Program, a total of 13 states have adopted the role. However, as of April 2020, there are fewer than 150 DTs in practice throughout the country, and educational and licensing requirements as well as scope of practice vary between each state. Such heterogeneity makes the training and recruitment of future DTs a challenge. This article summarizes the current state of the DT workforce in the United States and discusses the possible future of the profession as other states contemplate adopting the model in the face of ongoing oral health disparities.  相似文献   
104.

Background

Overall usage of email communication between patients and physicians continues to increase, due in part to expanding the adoption of electronic health records and patient portals. Unequal access and acceptance of these technologies has the potential to exacerbate disparities in care. Little is known about the attitudes of pediatric caregivers with regard to their acceptance of email as a means to communicate with their health care providers.

Objective

We conducted a survey to assess pediatric caregiver access to and attitudes toward the use of electronic communication modalities to communicate with health care providers in an urban pediatric primary care clinic.

Methods

Participants were pediatric caregivers recruited from an urban pediatric primary care clinic in Baltimore, Maryland, who completed a 35-item questionnaire in this cross-sectional study.

Results

Of the 229 caregivers who completed the survey (91.2% response rate), 171 (74.6%) reported that they use email to communicate with others. Of the email users, 145 respondents (86.3%) stated that they would like to email doctors, although only 18 (10.7%) actually do so. Among email users, African-American caregivers were much less likely to support the expanded use of email communication with health care providers (adjusted OR 0.34, 95% CI 0.14-0.82) as were those with annual incomes less than US $30,000 (adjusted OR 0.26, 95% CI 0.09-0.74).

Conclusions

Caregivers of children have access to email and many would be interested in communicating with health care providers. However, African-Americans and those in lower socioeconomic groups were much less likely to have positive attitudes toward email.  相似文献   
105.
106.
107.
108.
109.
Current medical models frequently overlook functional limitations and the home environment even though they partially determine healthcare usage and quality of life. The Centers for Medicare and Medicaid Services (CMS) Innovation Center funds projects that have potential to affect the “triple aim,” a framework for decreasing costs while improving health and quality of life. This article presents preliminary data from Community Aging in Place, Advancing Better Living for Elders (CAPABLE), a model funded by the CMS Innovation Center and designed to overcome the functional and home environmental barriers of older adults. CAPABLE is a patient‐directed, team‐based intervention comprising an occupational therapist, a registered nurse, and a handyman to decrease hospitalization and nursing home usage of community‐dwelling older adults with functional limitations who are dually eligible for Medicare and Medicaid. Activity of daily living limitations improved in 79% of the first 100 people who completed the intervention. Preliminary findings of this novel intervention may have implications for other older adults with functional limitations.  相似文献   
110.
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