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   709篇
  免费   57篇
耳鼻咽喉   1篇
儿科学   19篇
妇产科学   34篇
基础医学   65篇
口腔科学   4篇
临床医学   124篇
内科学   129篇
皮肤病学   3篇
神经病学   83篇
特种医学   5篇
外科学   66篇
综合类   6篇
一般理论   2篇
预防医学   89篇
眼科学   1篇
药学   74篇
肿瘤学   61篇
  2023年   9篇
  2022年   10篇
  2021年   37篇
  2020年   20篇
  2019年   36篇
  2018年   24篇
  2017年   18篇
  2016年   16篇
  2015年   18篇
  2014年   31篇
  2013年   55篇
  2012年   50篇
  2011年   47篇
  2010年   29篇
  2009年   16篇
  2008年   48篇
  2007年   28篇
  2006年   60篇
  2005年   43篇
  2004年   36篇
  2003年   29篇
  2002年   25篇
  2001年   10篇
  2000年   7篇
  1999年   9篇
  1998年   8篇
  1997年   2篇
  1996年   2篇
  1995年   5篇
  1994年   2篇
  1993年   2篇
  1992年   3篇
  1991年   2篇
  1990年   1篇
  1989年   5篇
  1988年   6篇
  1987年   3篇
  1986年   2篇
  1984年   1篇
  1982年   3篇
  1979年   1篇
  1977年   1篇
  1974年   1篇
  1973年   1篇
  1969年   1篇
  1967年   1篇
  1965年   1篇
  1915年   1篇
排序方式: 共有766条查询结果,搜索用时 15 毫秒
21.
22.

Objectives

To evaluate the short-term effects of staged InterStim® implantation on activities of daily living (ADL) and pain.

Methods

This prospective study assessed women undergoing staged InterStim® implantation. The Older Americans Resources and Services Program Multidimensional Functional Assessment Questionnaire asked participants about their ability to complete activities without help or what help they needed following stage I lead placement and stage II neurostimulator implantation. Narcotic use and a visual analog scale (VAS) for pain were recorded daily.

Results

Thirty-eight women underwent stage I with 33 (86.8 %) progressing to stage II. On stage I postoperative day (POD) 2, more women required help shopping compared with baseline (40 vs 17 %, p?<?0.004). The median pain score increased on Stage I POD1 (P?<?0.001) and the use of narcotics increased on POD1 and 2 compared with baseline (50 % vs 14 %, p?=?0.001). The same trends were seen following stage II.

Conclusions

Staged InterStim® implantation has minimal impact on ADL, pain or narcotic requirements.  相似文献   
23.
In order to report specifically on the use of adjuvant endocrine therapy (ET) in the oldest old breast cancer (BC) patients, we compared treatment patterns including drug compliance and persistence in a cohort of patients who were ≥80 years at diagnosis (n = 79) with those of “younger elderly” patients who were 60–79 years old (n = 358). The geriatric cohort more commonly declined the recommended ET (non-compliance: 13.0% vs. 4.5%, p = 0.011). Of the patients who initiated ET, only a minority of the older patients completed the planned therapy duration of five years (39.6% vs. 71.3%, p < 0.001). However, when applying strict criteria for non-persistence, this was found in comparable frequency (17.0% vs. 12.0%, p = 0.370). In older patients, medication was more often discontinued by the physician due to serious medical reasons independent of BC (17.0% vs. 4.7%, p = 0.003). Older women were treated by a general practitioner more often and not by an oncologist (54.4% vs. 23.9%, p < 0.001). Studies on compliance/persistence on cancer therapy in the oldest old demand a detailed follow-up of the patients and the consideration of principles of geriatric medicine. Efforts should be made to make sure that all physicians, but above all general practitioners, who are predominantly involved in the treatment of elderly BC patients, are provided with current knowledge and skills, as to ensure optimal patient management.  相似文献   
24.
Journal of Autism and Developmental Disorders - Adolescents with autism spectrum disorder (ASD) without an intellectual disability have daily living skills (DLS) impairments. An initial feasibility...  相似文献   
25.

Objectives

Prenatal smoking is the leading preventable cause of poor obstetric outcomes, yet treatment options are limited. Past reviews of prenatal smoking cessation have often grouped all counseling into a single category, which ignores the fact that psychotherapy is distinct from brief counseling. The objective of this study was to compare the effect sizes of two intensive interventions for prenatal smoking cessation: contingency management (i.e., financial incentives for abstinence) and psychotherapy.

Methods

A systematic search for randomized controlled trials testing the efficacy of contingency management or psychotherapy was completed using PubMed, PsycINFO, Web of Science, the Cochrane Library, and EMBASE. Independent raters extracted data and assessed trials for risk of bias. Treatment effects were analyzed for three times points: late pregnancy, early postpartum, and late postpartum.

Results

The search yielded 22 studies, and meta-analytic results indicated that interventions (compared with control groups) generally increased the odds of abstinence. Moderator analyses indicated that intervention type (contingency management vs. psychotherapy) accounted for variability in effect sizes. When comparing treatment type, effects of contingency management interventions were significantly greater than those of psychotherapeutic interventions. Although psychotherapy did not affect smoking abstinence, contingency management interventions had significant treatment effects at all three time points.

Conclusions

Contingency management seems to be a safe and efficacious prenatal smoking cessation treatment. Although psychotherapy alone did not show an effect on prenatal smoking abstinence, future research may seek to combine this approach with contingency management to promote prenatal smoking cessation.  相似文献   
26.
OBJECTIVE: To examine age-period-duration patterns of the prevalence of pressure ulcers in community-residing people with spinal cord injury (SCI). DESIGN: Multicenter cohort study. SETTING: Nine Model Spinal Cord Injury Systems throughout the United States. PARTICIPANTS: People with SCI (N=3361) injured between 1986 and 1995 and followed up thereafter on a yearly basis through 2002. INTERVENTIONS: Not applicable. MAIN OUTCOME MEASURE: Physician-confirmed pressure ulcers of stage II or greater at the follow-up visits. RESULTS: The multivariable generalized estimating equations model showed a significant trend toward increasing pressure ulcer prevalence in the recent years (1994-2002 vs 1984-1993: odds ratio=1.4; 95% confidence interval, 1.2-1.6) not explained by aging, years since injury, or demographic and clinical factors. The risk of pressure ulcers appeared to be steady during the first 10 years and increased 15 years postinjury. Pressure ulcers were more common among the elderly, men, African Americans, singles, subjects with education less than high school, unemployed, subjects with complete injury, and subjects with history of pressure ulcers, rehospitalization, nursing home stay, and other medical conditions. Injury cause and level had no significant effect. CONCLUSIONS: These results highlight the need for research into factors that contribute to the increasing pressure ulcer prevalence.  相似文献   
27.
Familial tumoral calcinosis is characterized by ectopic calcifications due to persistent hyperphosphatemia. The most common genetic cause of the disease is mutations in GALNT3, encoding a glycosyltransferase involved in a posttranslational modification of fibroblast growth factor 23 (FGF23). The Galnt3 knockout mouse we developed was hyperphosphatemic due to low intact Fgf23 levels, but did not develop any apparent calcifications on a standard rodent diet. We therefore tested the hypothesis that a further challenge with a high phosphate diet could induce ectopic calcifications in Galnt3 knockout mice. Mice were fed either normal (0.6%) or high (1.65%) phosphate diet for 20 weeks beginning from weaning at 3 weeks. The high phosphate diet did not affect serum phosphorus concentration. However, regardless of the dietary phosphate contents, serum phosphorus levels were consistently elevated in Galnt3 knockout mice. The mice on the high phosphate diet had slightly low serum calcium, but significantly high alkaline phosphatase, parathyroid hormone (PTH), and calcium in the kidney. Although none of Galnt3 knockout mice on the normal phosphate diet developed calcifications, calcifications appeared in approximately one‐half of the mice on the high phosphate diet by 12 weeks. Calcified masses were most often found around the neck and on the back and as large as 9.9 mm in length. These data indicate that dietary phosphate load has major impact on the development of ectopic calcifications in tumoral calcinosis. © 2014 American Society for Bone and Mineral Research.  相似文献   
28.

Rationale

The α4β2 nicotinic acetylcholine receptor partial agonist varenicline has been reported to reduce drinking among both heavy-drinking smokers and primary alcoholics, and this effect may be related to varenicline-mediated reduction of alcohol craving. Among smokers, varenicline has been reported to modulate cigarette cue-elicited brain activation in several reward-related areas.

Objectives

This pilot study tested varenicline’s effects on drinking, alcohol craving, and alcohol cue-elicited activation of reward-related brain areas among non-treatment-seeking alcohol-dependent individuals.

Methods

Thirty-five such individuals (mean age?=?30, 57 % male, 76 % heavy drinking days in the past month, 15 smokers) were randomized to either varenicline (titrated to 2 mg) or placebo for 14 days, and were administered an alcohol cue reactivity fMRI task on day 14. A priori regions of interest (ROIs) were bilateral and medial orbitofrontal cortex (OFC), right ventral striatum (VS), and medial prefrontal cortex (mPFC).

Results

Despite good medication adherence, varenicline did not reduce heavy drinking days or other drinking parameters. It did, however, increase self-reported control over alcohol-related thoughts and reduced cue-elicited activation bilaterally in the OFC, but not in other brain areas.

Conclusions

These data indicate that varenicline reduces alcohol craving and some of the neural substrates of alcohol cue reactivity. However, varenicline effects on drinking mediated by cue-elicited brain activation and craving might be best observed among treatment-seekers motivated to reduce their alcohol consumption.  相似文献   
29.

Background

For school-aged children with reading difficulties, an emerging and important area of investigation concerns determining predictors of intervention response. Previous studies have focused exclusively on cognitive and broadly defined behavioral variables. What has been missing, however, are studies examining anxiety, which is among the most commonly experienced difficulty for youth.

Objective

The present study examined anxiety among children classified as typically achieving or showing inadequate/adequate response following an intervention for reading problems.

Methods

Participants were 153 ethnically-diverse children (84 male, 69 female) evaluated in the winter and spring of their first-grade academic year. Children completed several standardized measures of reading achievement involving decoding and fluency along with a multidimensional anxiety rating scale.

Results

Repeated measures ANOVA revealed significant main effects for time and scale and significant interactions for time × scale and group × scale. Logistic regression examined whether anxiety predicted response to intervention (Y/N) at the end of the school-year.

Conclusions

Results showed overall decreases in anxiety over time, with the exception of the harm avoidance area which increased and also interacted with group (children with decoding/fluency difficulties reported less harm avoidance than typically achieving children). The harm avoidance area was most pertinent across analyses highlighting the potential importance of targeting this area; however, none of the anxiety scales predicted response group at the end of the intervention. Ongoing research is needed in this area in order to identify characteristics of inadequate responders to reading intervention programs and/or inform interventions that incorporate these socioemotional factors.  相似文献   
30.
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