Abstract:
PURPOSE:To compare the efficacy, safety, and cost-effectiveness of low-molecular-weight heparin with standard heparin for the prevention of deep vein thrombosis after total hip arthroplasty. DATA IDENTIFICATION:Studies were identified by MEDLINE search and review of bibliographies of retrieved articles. Hospital resources used in treating deep vein thrombosis and bleeding complications after total hip arthroplasty were estimated using retrospectively collected data from 447 patients who participated in a recently completed randomized controlled deep vein thrombosis prophylaxis trial at our center. STUDY SELECTION:Randomized controlled trials directly comparing a low-molecular-weight heparin preparation with standard heparin for the prevention of deep vein thrombosis after total hip arthroplasty were potentially eligible for the meta-analysis. DATA EXTRACTION:Data from eligible studies were extracted independently by two of the authors. Multiple regression analysis of data from the patient cohort was used to estimate the effect of deep vein thrombosis and bleeding on length of hospital stay. A hypothetical North American price for low-molecular-weight heparin was determined based on the ratio between low-molecular-weight heparin and standard heparin in France. Costs were based on weighted per-diem hospital expenditures and physician fees for procedures and reported in 1992 U.S. dollars. RESULTS OF DATA SYNTHESIS:Meta-analysis of six eligible trials determined that low-molecular-weight heparin was significantly more effective than standard heparin at preventing deep vein thrombosis after total hip arthroplasty (common odds ratio, 0.72; 95% CI, 0.53 to 0.95). However, this benefit was restricted to the prevention of proximal deep vein thrombosis (common odds ratio, 0.40; CI, 0.28 to 0.59). No significant differences were found in the rates of distal deep vein thrombosis or total, major, or minor bleeding between the two groups. Based on a 2.6 to 1 price ratio between low-molecular-weight heparin and standard heparin, use of low-molecular-weight heparin would save the health care system about $50,000 per 1000 patients treated. Sensitivity analysis shows that if the low-molecular-weight heparin/standard heparin price ratio exceeds 3.7 (the threshold value lies between 0.8 and 5.5 based on the extremes of the 95% CI of the common odds ratios for deep vein thrombosis and bleeding complications), use of low-molecular-weight heparin is more expensive. At a price ratio of 10, it would cost more than $250,000 to treat 1000 patients with low-molecular-weight heparin compared with standard heparin or about $5000 for each additional deep vein thrombosis prevented with low-molecular-weight heparin. CONCLUSIONS:Low-molecular-weight heparin is more effective and is at least as safe as standard heparin for the prevention of deep vein thrombosis after total hip arthroplasty. Based on the current French price ratio of low-molecular-weight heparin to standard heparin, the use of low-molecular-weight heparin in North America would result in overall savings in cost; however, the relative cost-effectiveness is critically dependent on the price ratio between the two drugs. Further research is needed to compare the cost-effectiveness of low-molecular-weight heparin with other prophylactic regimens and postoperative deep vein thrombosis management strategies.
journal_name
Ann Intern Medjournal_title
Annals of internal medicineauthors
Anderson DR,O'Brien BJ,Levine MN,Roberts R,Wells PS,Hirsh Jdoi
10.7326/0003-4819-119-11-199312010-00008subject
Has Abstractpub_date
1993-12-01 00:00:00pages
1105-12issue
11eissn
0003-4819issn
1539-3704journal_volume
119pub_type
杂志文章,meta分析abstract:BACKGROUND:Sleep-related accidents often involve healthy young persons who are driving at night. Coffee and napping restore alertness, but no study has compared their effects on real nighttime driving performances. OBJECTIVE:To test the effects of 125 mL of coffee (half a cup) containing 200 mg of caffeine, placebo (d...
journal_title:Annals of internal medicine
pub_type: 杂志文章,随机对照试验
doi:10.7326/0003-4819-144-11-200606060-00004
更新日期:2006-06-06 00:00:00
abstract:BACKGROUND:Dietary trans fat increases risk for coronary heart disease. In 2006, New York City (NYC) passed the first regulation in the United States restricting trans fat use in restaurants. OBJECTIVE:To assess the effect of the NYC regulation on the trans and saturated fat content of fast-food purchases. DESIGN:Cro...
journal_title:Annals of internal medicine
pub_type: 杂志文章
doi:10.7326/0003-4819-157-2-201207170-00004
更新日期:2012-07-17 00:00:00
abstract::During the last 2 years, the use of pulsed Doppler echocardiography for assessing left ventricular diastolic function has received increased attention. This method is based on measurements derived from a waveform that reflects the velocity of blood flow through the mitral valve during ventricular filling. The techniqu...
journal_title:Annals of internal medicine
pub_type: 杂志文章,评审
doi:10.7326/0003-4819-109-2-122
更新日期:1988-07-15 00:00:00
abstract:BACKGROUND:The frequency and severity of post-thrombotic sequelae after spontaneous axillary-subclavian venous thrombosis remain poorly known. OBJECTIVE:To determine the late sequelae of conventionally treated spontaneous axillary-subclavian venous thrombosis. DESIGN:Cross-sectional study. SETTING:University departm...
journal_title:Annals of internal medicine
pub_type: 杂志文章
doi:10.7326/0003-4819-131-7-199910050-00006
更新日期:1999-10-05 00:00:00
abstract:BACKGROUND:Few treatments for back pain are supported by strong scientific evidence. Conventional treatments, although widely used, have had limited success. Dissatisfied patients have, therefore, turned to complementary and alternative medical therapies and providers for care for back pain. PURPOSE:To provide a rigor...
journal_title:Annals of internal medicine
pub_type: 杂志文章,评审
doi:10.7326/0003-4819-138-11-200306030-00011
更新日期:2003-06-03 00:00:00
abstract::Antimicrobial prophylaxis prevents recurrent urinary tract infections in susceptible women, but its cost effectiveness has not been studied. In a recent placebo-controlled trial of urinary prophylaxis, we also assessed cost effectiveness using a decision analysis model. In our hospital the direct cost of 1 patient yea...
journal_title:Annals of internal medicine
pub_type: 临床试验,杂志文章,随机对照试验
doi:10.7326/0003-4819-94-2-251
更新日期:1981-02-01 00:00:00
abstract::Fifty-five consecutive patients with advanced recurrent Hodgkin's disease resistant to MOPP chemotherapy (mechlorethamine, vincristine, procarbazine, and prednisone) were given ABVD chemotherapy (doxorubicin, bleomycin, vinblastine, and dacarbazine). In 54 patients evaluable for response, complete remission after path...
journal_title:Annals of internal medicine
pub_type: 杂志文章
doi:10.7326/0003-4819-96-2-139
更新日期:1982-02-01 00:00:00
abstract:BACKGROUND:Left bundle-branch block (BBB) is considered an important predictor of poor outcome in patients with acute myocardial infarction, but the consequences of right BBB are not well understood. OBJECTIVES:To 1) estimate the prevalence of left and right BBB in patients with myocardial infarction; 2) compare the c...
journal_title:Annals of internal medicine
pub_type: 杂志文章
doi:10.7326/0003-4819-129-9-199811010-00003
更新日期:1998-11-01 00:00:00
abstract::Active-control noninferiority trials are being performed with increasing frequency when standard placebo-controlled trials are considered unethical. Three attributes are optimally required to establish noninferiority: 1) The treatment under consideration exhibits therapeutic noninferiority to the active control; 2) th...
journal_title:Annals of internal medicine
pub_type: 杂志文章
doi:10.7326/0003-4819-145-1-200607040-00011
更新日期:2006-07-04 00:00:00
abstract:STUDY OBJECTIVE:To determine the association between current non-aspirin nonsteroidal anti-inflammatory drug (NSAID) use and fatal peptic ulcers or upper gastrointestinal hemorrhage. DESIGN:Nested case control study using a linked Medicaid-death certificate database. SETTING:Tennessee Medicaid enrollees aged 60 and g...
journal_title:Annals of internal medicine
pub_type: 杂志文章
doi:10.7326/0003-4819-109-5-359
更新日期:1988-09-01 00:00:00
abstract:STUDY OBJECTIVE:To assess the efficacy and toxicity of cyclosporin A in patients with severe, treatment-refractory rheumatoid arthritis. DESIGN:Prospective randomized, double-blind 6-month trial. PATIENTS:Thirty-one patients who had classic seropositive rheumatoid arthritis with active synovitis unresponsive to conve...
journal_title:Annals of internal medicine
pub_type: 临床试验,杂志文章,随机对照试验
doi:10.7326/0003-4819-109-11-863
更新日期:1988-12-01 00:00:00
abstract:OBJECTIVE:To assess the safety and efficacy of minocycline in the treatment of rheumatoid arthritis. DESIGN:A double-blind, randomized, multicenter, 48-week trial of oral minocycline (200 mg/d) or placebo. SETTING:6 clinical centers in the United States. PATIENTS:219 adults with active rheumatoid arthritis who had p...
journal_title:Annals of internal medicine
pub_type: 临床试验,杂志文章,多中心研究,随机对照试验
doi:10.7326/0003-4819-122-2-199501150-00001
更新日期:1995-01-15 00:00:00
abstract::Conventional interpretation of clinical trials relies heavily on the classic p value. The p value, however, represents only a false-positive rate, and does not tell the probability that the investigator's hypothesis is correct, given his observations. This more relevant posterior probability can be quantified by an ex...
journal_title:Annals of internal medicine
pub_type: 杂志文章
doi:10.7326/0003-4819-98-3-385
更新日期:1983-03-01 00:00:00
abstract:BACKGROUND:Mucositis can be a serious complication of cancer treatment. Palifermin reduces mucositis when given in multiple doses to patients undergoing hematopoietic stem-cell transplantation. OBJECTIVE:To evaluate the efficacy of palifermin given as a single dose before each cycle in patients receiving multicycle ch...
journal_title:Annals of internal medicine
pub_type: 杂志文章,随机对照试验
doi:10.7326/0003-4819-153-6-201009210-00003
更新日期:2010-09-21 00:00:00
abstract::Common variable immunodeficiency (CVI) is a heterogenous immunodeficiency syndrome characterized by hypogammaglobulinemia, recurrent bacterial infections, and various immunologic abnormalities. In addition to recurrent infections, patients with this syndrome also have an increased incidence of autoimmune disease and m...
journal_title:Annals of internal medicine
pub_type: 杂志文章,评审
doi:10.7326/0003-4819-118-9-199305010-00011
更新日期:1993-05-01 00:00:00
abstract:Background:Medicare uses the Centers for Medicare & Medicaid Services Hierarchical Condition Category (CMS-HCC) model to predict patients' annualized Medicare costs in value-based payment programs. The CMS-HCC model does not include measures of frailty, and prior research shows that it systematically underpredicts cost...
journal_title:Annals of internal medicine
pub_type: 杂志文章
doi:10.7326/M19-3261
更新日期:2020-04-21 00:00:00
abstract:BACKGROUND:Thymectomy is standard therapy fornonthymomatousmyasthenia gravis despite the absence of randomized clinical trials (1). Myasthenia gravis is uncommonly reported in monozygous twins; disease concordance occurs in approximately one third of such identical twin pairs; and treatment for myasthenia gravis, when ...
journal_title:Annals of internal medicine
pub_type: 信件
doi:10.7326/0003-4819-155-7-201110040-00016
更新日期:2011-10-04 00:00:00
abstract::We examined the survival time and costs of therapy for patients with end-stage renal disease. A computer simulation model of the current system was constructed to estimate the cost-effectiveness of home and center hemodialysis and live related as well as cadaver donor renal transplantation. Analysis of the simulation ...
journal_title:Annals of internal medicine
pub_type: 杂志文章
doi:10.7326/0003-4819-92-2-243
更新日期:1980-02-01 00:00:00
abstract:BACKGROUND:Although antiviral therapy is cost-effective in adults, its cost-effectiveness in older adults has not been studied. OBJECTIVE:To determine the cost-effectiveness of influenza testing and treatment strategies for older adults. DESIGN:Cost-utility decision model. DATA SOURCES:Clinical trials of antiviral d...
journal_title:Annals of internal medicine
pub_type: 杂志文章
doi:10.7326/0003-4819-139-5_part_1-200309020-00007
更新日期:2003-09-02 00:00:00
abstract::Fifteen patients with chronic type B hepatitis were treated with corticosteroids in a randomized, double-blind, placebo-controlled trial lasting 28 days. Ten patients received prednisolone, 60 mg/d for 2 weeks, then 30 mg/d for another 2 weeks; 5 patients received placebo. Serum aminotransferase levels decreased signi...
journal_title:Annals of internal medicine
pub_type: 临床试验,杂志文章,随机对照试验
doi:10.7326/0003-4819-104-1-12
更新日期:1986-01-01 00:00:00
abstract::A case of a patient with metastatic cancer raises the issues of patient refusal of treatment, euthanasia, and unintended side effects of therapy. For each management dilemma, there are relevant ethical and legal considerations, justifications, and conclusions. In addition, psychological and social influences on the de...
journal_title:Annals of internal medicine
pub_type: 杂志文章
doi:
更新日期:1980-01-01 00:00:00
abstract::Recently, antibodies to human T-cell leukemia virus membrane antigens (HTLV-MA) and elevated levels of beta 2-microglobulin and thymosin alpha 1 have been found with high frequency in patients with the acquired immunodeficiency syndrome. Prospective studies of asymptomatic persons at high risk for this syndrome will a...
journal_title:Annals of internal medicine
pub_type: 杂志文章
doi:10.7326/0003-4819-100-2-178
更新日期:1984-02-01 00:00:00
abstract::A 20-year follow-up evaluation of young men with fixed and reproducible orthostatic proteinuria showed no evidence of progressive renal disease. Follow-up information was obtained on 43 of the original 64 patients and detailed information was secured on 36. All had normal renal function and only six patients continued...
journal_title:Annals of internal medicine
pub_type: 杂志文章
doi:10.7326/0003-4819-97-4-516
更新日期:1982-10-01 00:00:00
abstract:Background:FLU-v is a broad-spectrum influenza vaccine that induces antibodies and cell-mediated immunity. Objective:To compare the safety, immunogenicity, and exploratory efficacy of different formulations and dosing regimens of FLU-v versus placebo. Design:Randomized, double-blind, placebo-controlled, single-center...
journal_title:Annals of internal medicine
pub_type: 杂志文章,随机对照试验
doi:10.7326/M19-0735
更新日期:2020-04-07 00:00:00
abstract:BACKGROUND:AL amyloidosis is a fatal disease resulting from tissue deposition of amyloid fibrils derived from monoclonal immunoglobulin light chains. Treatment with oral chemotherapy is minimally effective. OBJECTIVE:To test survival and organ response in a large sample of patients treated with high-dose intravenous m...
journal_title:Annals of internal medicine
pub_type: 临床试验,杂志文章
doi:10.7326/0003-4819-140-2-200401200-00008
更新日期:2004-01-20 00:00:00
abstract::Type 2 diabetes mellitus is a metabolic disease of carbohydrate metabolism. However, it should also be considered a vascular disease because diabetic patients have a strong predilection for atherosclerosis. With the increasing prevalence and earlier age at onset of diabetes, the projected effect of diabetes on cardiov...
journal_title:Annals of internal medicine
pub_type: 杂志文章,评审
doi:10.7326/0003-4819-139-10-200311180-00010
更新日期:2003-11-18 00:00:00
abstract::Data on body weight and weight change collected from nationally representative samples of U.S. adults are reviewed. The body mass index (weight [kg]/height [m2]) has a low correlation with height and is used to compare body weights between persons of differing heights. The BMI varies to a greater degree in women than ...
journal_title:Annals of internal medicine
pub_type: 杂志文章,评审
doi:10.7326/0003-4819-119-7_part_2-199310011-00004
更新日期:1993-10-01 00:00:00
abstract:OBJECTIVE:To assess safety, pharmacokinetics, and in-vivo virologic activity of five different combination regimens of zidovudine and didanosine compared with zidovudine alone in patients with human immunodeficiency virus type 1 (HIV-1) infection. DESIGN:Open-label, partially randomized, dose-ranging study. SETTING:U...
journal_title:Annals of internal medicine
pub_type: 临床试验,杂志文章,多中心研究,随机对照试验
doi:10.7326/0003-4819-119-8-199310150-00003
更新日期:1993-10-15 00:00:00
abstract::Brain death has been discussed extensively for the last 25 years. Most investigators now believe that requiring death of the entire brain as the criterion for brain death in the Uniform Determination of Death Act and the standard clinical tests of brain death outlined in the Report of the Medical Consultants to the Pr...
journal_title:Annals of internal medicine
pub_type: 杂志文章,评审
doi:10.7326/0003-4819-119-6-199309150-00013
更新日期:1993-09-15 00:00:00
abstract::In 1984, both the United Kingdom and the United States received recommendations from panels of experts specifically convened to consider the merits of Depo-Provera (depot medroxyprogesterone acetate [DMPA]) as a long-term contraceptive agent. This study compares the final reports written by these panels. We explore wh...
journal_title:Annals of internal medicine
pub_type: 杂志文章
doi:10.7326/0003-4819-106-6-886
更新日期:1987-06-01 00:00:00