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   114958篇
  免费   31312篇
  国内免费   1211篇
耳鼻咽喉   2640篇
儿科学   3209篇
妇产科学   2923篇
基础医学   4252篇
口腔科学   5639篇
临床医学   27222篇
内科学   28355篇
皮肤病学   3679篇
神经病学   12794篇
特种医学   4221篇
外国民族医学   9篇
外科学   21480篇
综合类   780篇
现状与发展   41篇
一般理论   21篇
预防医学   14494篇
眼科学   2749篇
药学   2867篇
中国医学   160篇
肿瘤学   9946篇
  2024年   547篇
  2023年   5231篇
  2022年   1382篇
  2021年   3974篇
  2020年   5955篇
  2019年   2806篇
  2018年   7941篇
  2017年   7952篇
  2016年   8524篇
  2015年   8694篇
  2014年   11274篇
  2013年   13143篇
  2012年   5168篇
  2011年   4950篇
  2010年   7525篇
  2009年   9669篇
  2008年   4292篇
  2007年   3311篇
  2006年   4345篇
  2005年   2761篇
  2004年   2116篇
  2003年   1679篇
  2002年   1556篇
  2001年   2103篇
  2000年   1417篇
  1999年   1931篇
  1998年   2184篇
  1997年   1981篇
  1996年   2023篇
  1995年   1769篇
  1994年   1132篇
  1993年   948篇
  1992年   856篇
  1991年   736篇
  1990年   606篇
  1989年   606篇
  1988年   583篇
  1987年   448篇
  1986年   439篇
  1985年   369篇
  1984年   311篇
  1983年   379篇
  1982年   254篇
  1981年   235篇
  1980年   147篇
  1979年   138篇
  1978年   161篇
  1977年   163篇
  1976年   123篇
  1974年   108篇
排序方式: 共有10000条查询结果,搜索用时 78 毫秒
1.

Objective

The aim of the study was to estimate the effect of the state-based reinsurance programs through the section 1332 State Innovation Waivers on health insurance marketplace premiums and insurer participation.

Data Source

2015 to 2022 Robert Wood Johnson Foundation Health Insurance Exchange Compare Datasets.

Study Design

An event study difference-in-differences (DD) model separately for each year of implementation and a synthetic control method (SCM) are used to estimate year-by-year effects following program implementation.

Data Collection/Extraction Methods

Not applicable.

Principal Findings

Reinsurance programs were associated with a decline in premiums in the first year of implementation by 10%–13%, 5%–19%, and 11%–17% for bronze, silver, and gold plans (p < 0.05). There is a trend of sustained declines especially for states that implemented their programs in 2019 and 2020. The SCM analyses suggest some effect heterogeneity across states but also premium declines across most states. There is no evidence that reinsurance programs affected insurer participation.

Conclusion

State-based reinsurance programs have the potential to improve the affordability of health insurance coverage. However, reinsurance programs do not appear to have had an effect on insurer participation, highlighting the need for policy makers to consider complementary strategies to encourage insurer participation.  相似文献   
2.
3.
4.
5.
6.
7.
8.
9.
10.
BackgroundTotal hip and knee arthroplasties are increasingly performed operations, and routine follow-up places huge demands on orthopedic services. This study investigates the effectiveness, patients’ satisfaction, and cost reduction of Virtual Joint Replacement Clinic (VJRC) follow-up of total hip arthroplasty and total knee arthroplasty patients in a university hospital. VJRC is especially valuable when in-person appointments are not advised or feasible such as during the COVID-19 pandemic.MethodsA total of 1749 patients who were invited for VJRC follow-up for knee or hip arthroplasty from January 2017 to December 2018 were included in this retrospective study. Patients were referred to VJRC after their 6-week postoperative review. Routine VJRC postoperative review was undertaken at 1 and 7 years and then 3-yearly thereafter. We evaluated the VJRC patient response rate, acceptability, and outcome. Patient satisfaction was measured in a subgroup of patients using a satisfaction survey. VJRC costs were calculated compared to face-to-face follow-up.ResultsThe VJRC had a 92.05% overall response rate. Only 7.22% required further in-person appointments with only 3% being reviewed by an orthopedic consultant. VJRC resulted in an estimated saving of £42,644 per year at our institution. The patients’ satisfaction survey showed that 89.29% of the patients were either satisfied or very satisfied with VJRC follow-up.ConclusionVJRC follow-up for hip and knee arthroplasty patients is an effective alternative to in-person clinic assessment which is accepted by patients, has high patient satisfaction, and can reduce the cost to both health services and patients.  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