Abstract:
BACKGROUND:Risk for transmission of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) to close contacts of infected persons has not been well estimated. OBJECTIVE:To evaluate the risk for transmission of SARS-CoV-2 to close contacts in different settings. DESIGN:Prospective cohort study. SETTING:Close contacts of persons infected with SARS-CoV-2 in Guangzhou, China. PARTICIPANTS:3410 close contacts of 391 index cases were traced between 13 January and 6 March 2020. Data on the setting of the exposure, reverse transcriptase polymerase chain reaction testing, and clinical characteristics of index and secondary cases were collected. MEASUREMENT:Coronavirus disease 2019 (COVID-19) cases were confirmed by guidelines issued by China. Secondary attack rates in different settings were calculated. RESULTS:Among 3410 close contacts, 127 (3.7% [95% CI, 3.1% to 4.4%]) were secondarily infected. Of these 127 persons, 8 (6.3% [CI, 2.1% to 10.5%]) were asymptomatic. Of the 119 symptomatic cases, 20 (16.8%) were defined as mild, 87 (73.1%) as moderate, and 12 (10.1%) as severe or critical. Compared with the household setting (10.3%), the secondary attack rate was lower for exposures in health care settings (1.0%; odds ratio [OR], 0.09 [CI, 0.04 to 0.20]) and on public transportation (0.1%; OR, 0.01 [CI, 0.00 to 0.08]). The secondary attack rate increased with the severity of index cases, from 0.3% (CI, 0.0% to 1.0%) for asymptomatic to 3.3% (CI, 1.8% to 4.8%) for mild, 5.6% (CI, 4.4% to 6.8%) for moderate, and 6.2% (CI, 3.2% to 9.1%) for severe or critical cases. Index cases with expectoration were associated with higher risk for secondary infection (13.6% vs. 3.0% for index cases without expectoration; OR, 4.81 [CI, 3.35 to 6.93]). LIMITATION:There was potential recall bias regarding symptom onset among patients with COVID-19, and the symptoms and severity of index cases were not assessed at the time of exposure to contacts. CONCLUSION:Household contact was the main setting for transmission of SARS-CoV-2, and the risk for transmission of SARS-CoV-2 among close contacts increased with the severity of index cases. PRIMARY FUNDING SOURCE:Guangdong Province Higher Vocational Colleges and Schools Pearl River Scholar Funded Scheme.
journal_name
Ann Intern Medjournal_title
Annals of internal medicineauthors
Luo L,Liu D,Liao X,Wu X,Jing Q,Zheng J,Liu F,Yang S,Bi H,Li Z,Liu J,Song W,Zhu W,Wang Z,Zhang X,Huang Q,Chen P,Liu H,Cheng X,Cai M,Yang P,Yang X,Han Z,Tang J,Ma Y,Mao Cdoi
10.7326/M20-2671subject
Has Abstractpub_date
2020-12-01 00:00:00pages
879-887issue
11eissn
0003-4819issn
1539-3704journal_volume
173pub_type
杂志文章abstract:OBJECTIVE:To evaluate the 6-month change in cardiovascular (coronary heart disease) risk as a function of diet and drug therapy for mild hypertension. DESIGN:Collaborative randomized, controlled clinical trial to assess the efficacy of alternative regimens in treating mild hypertension. SETTING:Three university-based...
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:10.7326/0003-4819-112-2-89
更新日期:1990-01-15 00:00:00
abstract::Five of 70 patients with systemic lupus erythematosus seen over a 5-year period had peripheral blood films suggestive of hyposplenism. Technetium-99m-sulfur colloid scans showed no splenic activity in three patients. One of these three patients, who had a spontaneous remission of persistent thrombocytopenia concurrent...
journal_title:Annals of internal medicine
pub_type: 杂志文章
doi:10.7326/0003-4819-96-1-40
更新日期:1982-01-01 00:00:00
abstract:OBJECTIVE:To determine if polyvalent IgG is promising therapy for severe IgG nephropathy. DESIGN:Open prospective cohort study. SETTING:Referral nephrology unit. PATIENTS:11 adult patients with severe IgA nephropathy (9 who had idiopathic disease and 2 who had Henoch-Schönlein purpura) and indicators of poor prognos...
journal_title:Annals of internal medicine
pub_type: 杂志文章
doi:10.7326/0003-4819-120-6-199403150-00005
更新日期:1994-03-15 00:00:00
abstract::Previous epidemiologic studies of staphylococcal infections in newborn infants and surgical patients provide clues to the method of infection in toxic shock syndrome. In newborn infants, staphylococci were shown to be transmitted most often by the hands of nursery personnel to the umbilical stump, which afforded a war...
journal_title:Annals of internal medicine
pub_type: 杂志文章
doi:10.7326/0003-4819-96-6-934
更新日期:1982-06-01 00:00:00
abstract:OBJECTIVE:To prospectively study the clinical features, pathophysiology, treatment and prognosis of Wegener granulomatosis. DESIGN:Of the 180 patients with Wegener granulomatosis referred to the National Institute of Allergy and Infectious Diseases during the past 24 years, 158 have been followed for 6 months to 24 ye...
journal_title:Annals of internal medicine
pub_type: 杂志文章
doi:10.7326/0003-4819-116-6-488
更新日期:1992-03-15 00:00:00
abstract:OBJECTIVE:To evaluate the relation between skeletal muscle disease (myopathy) and degenerative changes in cardiac muscle (cardiomyopathy) in patients with chronic alcoholism. DESIGN:A cross-sectional study. SETTING:University medical center. PARTICIPANTS:Group A included 24 patients with chronic alcoholism who had d...
journal_title:Annals of internal medicine
pub_type: 临床试验,杂志文章,随机对照试验
doi:10.7326/0003-4819-120-7-199404010-00001
更新日期:1994-04-01 00:00:00
abstract::Two patients presenting with nephrotic syndrome but without evidence of collagen vascular disease had organized glomerular immune deposits with a "fingerprint" pattern. This finding has been previously associated with lupus nephritis and, in our institution, has been seen in 6% of the biopsy specimens from patients wi...
journal_title:Annals of internal medicine
pub_type: 杂志文章
doi:10.7326/0003-4819-100-1-66
更新日期:1984-01-01 00:00:00
abstract:OBJECTIVE:To determine whether protruding atheromas in the thoracic aorta are a risk factor for systemic embolization. DESIGN:Case-control study. SETTING:A referral hospital. PATIENTS:A total of 122 patients with a history of stroke, transient ischemic attack, or peripheral emboli and an equal number of age- and sex...
journal_title:Annals of internal medicine
pub_type: 杂志文章
doi:10.7326/0003-4819-115-6-423
更新日期:1991-09-15 00:00:00
abstract:BACKGROUND:Depression collaborative care implementation using community engagement and planning (CEP) across programs improves 6-month client outcomes in minority communities, compared with technical assistance to individual programs (resources for services [RS]). However, 12-month outcomes are unknown. OBJECTIVE:To c...
journal_title:Annals of internal medicine
pub_type: 杂志文章,随机对照试验
doi:10.7326/M13-3011
更新日期:2014-11-18 00:00:00
abstract:BACKGROUND:Alleviating the problems faced by dying persons and their families has drawn substantial public attention, but little is known about the experience of dying. OBJECTIVE:To characterize the experience of dying from the perspective of surrogate decision makers, usually close family members (89%). DESIGN:Prosp...
journal_title:Annals of internal medicine
pub_type: 杂志文章,多中心研究
doi:10.7326/0003-4819-126-2-199701150-00001
更新日期:1997-01-15 00:00:00
abstract::Acute severe aortic regurgitation is a relatively unfamiliar, though life-threatening, disease. We review its diverse causes, anatomic faults, and hemodynamic sequelae and set the stage for an understanding of the clinical manifestations in light of their physiologic mechanisms. Clinical information includes the natur...
journal_title:Annals of internal medicine
pub_type: 杂志文章,评审
doi:10.7326/0003-4819-87-2-223
更新日期:1977-08-01 00:00:00
abstract:BACKGROUND:Posttransplantation acute renal failure (ARF) occurs in roughly 25% of recipients of organs from deceased donors. Inflammation in the donor organ is associated with risk for ARF. OBJECTIVE:To determine whether administering corticosteroids to deceased organ donors reduces the incidence and duration of ARF i...
journal_title:Annals of internal medicine
pub_type: 杂志文章,多中心研究,随机对照试验
doi:10.7326/0003-4819-153-4-201008170-00003
更新日期:2010-08-17 00:00:00
abstract:BACKGROUND:Resistance to activated protein C due to the factor V R506Q (Leiden) mutation is the most common clotting abnormality in patients with venous thromboembolism. OBJECTIVE:To evaluate the risk for venous thromboembolism associated with the factor V Leiden mutation or with resistance to activated protein C in t...
journal_title:Annals of internal medicine
pub_type: 杂志文章
doi:10.7326/0003-4819-130-8-199904200-00004
更新日期:1999-04-20 00:00:00
abstract::The prevalence of sleep apnea was studied in 46 middle- and older-aged men with "essential hypertension." Thirty-four age- and weight-similar normotensive men were also studied. Fourteen hypertensive men and three controls had sleep apnea syndrome, as defined as greater than ten apneas per hour of sleep. Hypertensive ...
journal_title:Annals of internal medicine
pub_type: 杂志文章
doi:10.7326/0003-4819-103-2-190
更新日期:1985-08-01 00:00:00
abstract::We studied D-penicillamine toxicity in 259 patients with systemic sclerosis treated since 1972. The average daily dose of 635 mg was given for a mean of 1.8 years. Of patients with systemic sclerosis, 47% has side effects from D-penicillamine treatment, similar to the 56% of 807 patients with rheumatoid arthritis in s...
journal_title:Annals of internal medicine
pub_type: 杂志文章
doi:10.7326/0003-4819-104-5-699
更新日期:1986-05-01 00:00:00
abstract:BACKGROUND:Advice and exercise are widely recommended for subacute low back pain, but the effectiveness of these interventions is unclear. OBJECTIVE:To investigate the effectiveness of physiotherapist-prescribed exercise, advice, or both for subacute low back pain. DESIGN:Factorial randomized, placebo-controlled tria...
journal_title:Annals of internal medicine
pub_type: 杂志文章,多中心研究,随机对照试验
doi:10.7326/0003-4819-146-11-200706050-00007
更新日期:2007-06-05 00:00:00
abstract:BACKGROUND:Previous studies suggest that patients hospitalized with acute myocardial infarction (MI) in December have poor outcomes, and some studies have hypothesized that the cause may be the infrequent use of evidence-based therapies during the December holiday season. OBJECTIVE:To compare the care and outcomes of ...
journal_title:Annals of internal medicine
pub_type: 杂志文章
doi:10.7326/0003-4819-143-7-200510040-00006
更新日期:2005-10-04 00:00:00
abstract:DESCRIPTION:Reaffirmation of the 2004 U.S. Preventive Services Task Force (USPSTF) recommendation statement on screening for testicular cancer. METHODS:The USPSTF performed a targeted literature search for benefits and harms of screening for testicular cancer in asymptomatic males and found no new studies. RECOMMENDA...
journal_title:Annals of internal medicine
pub_type: 杂志文章,实务指引
doi:10.7326/0003-4819-154-7-201104050-00006
更新日期:2011-04-05 00:00:00
abstract:BACKGROUND:Extended-duration low-molecular-weight heparin has been shown to prevent venous thromboembolism (VTE) in high-risk surgical patients. OBJECTIVE:To evaluate the efficacy and safety of extended-duration enoxaparin thromboprophylaxis in acutely ill medical patients. DESIGN:Randomized, parallel, placebo-contro...
journal_title:Annals of internal medicine
pub_type: 杂志文章,多中心研究,随机对照试验
doi:10.7326/0003-4819-153-1-201007060-00004
更新日期:2010-07-06 00:00:00
abstract:BACKGROUND:Medicare's value-based purchasing (VBP) and the Hospital Readmissions Reduction Program (HRRP) could disproportionately affect safety-net hospitals. OBJECTIVE:To determine whether safety-net hospitals incur larger financial penalties than other hospitals under VBP and HRRP. DESIGN:Cross-sectional analysis....
journal_title:Annals of internal medicine
pub_type: 杂志文章
doi:10.7326/M14-2813
更新日期:2015-09-15 00:00:00
abstract::Impairment of penicillin G excretion in renal failure may result in life-threatening, dose-related toxicity. We report a method for achieving a desired mean serum penicillin G concentration in patients with renal failure, with minimal risk of both undertreatment and drug toxicity. The method is based on the linear rel...
journal_title:Annals of internal medicine
pub_type: 杂志文章
doi:10.7326/0003-4819-82-2-189
更新日期:1975-02-01 00:00:00
abstract::Implantable cardioverter defibrillators are life-saving devices for many patients with cardiac disease. Recipients of these devices, nevertheless, often suffer from progressive comorbid and cardiac conditions. Therefore, physicians should anticipate situations in which the defibrillator is no longer desired by the pat...
journal_title:Annals of internal medicine
pub_type: 杂志文章
doi:10.7326/0003-4819-142-8-200504190-00012
更新日期:2005-04-19 00:00:00
abstract::In 1993, the Clinical Efficacy Assessment Subcommittee began evaluation of new topics and reevaluation of previous guidelines on common screening tests, which were published in Annals of Internal Medicine between 1988 and 1990 and republished as a collection in 1991 (Eddy DM, ed. Common Screening Tests. Philadelphia: ...
journal_title:Annals of internal medicine
pub_type: 杂志文章,评审
doi:10.7326/0003-4819-122-12-199506150-00008
更新日期:1995-06-15 00:00:00
abstract:SOURCE CITATION:Ye Z, Rochwerg B, Wang Y, et al. Treatment of patients with nonsevere and severe coronavirus disease 2019: an evidence-based guideline. CMAJ. 2020;192:E536-45. 32350002. ...
journal_title:Annals of internal medicine
pub_type: 杂志文章
doi:10.7326/ACPJ202007210-004
更新日期:2020-07-21 00:00:00
abstract:BACKGROUND:Soon, half of all physicians may be married to other physicians (that is, in dual-doctor families). Little is known about how marriage to another physician affects physicians themselves. OBJECTIVE:To learn how physicians in dual-doctor families differ from other physicians in their professional and family l...
journal_title:Annals of internal medicine
pub_type: 杂志文章
doi:10.7326/0003-4819-130-4-199902160-00017
更新日期:1999-02-16 00:00:00
abstract:OBJECTIVE:To identify and describe patients with hepatotoxicity possibly caused by flutamide, an antiandrogen drug. DESIGN:Case series of reports, submitted to the Adverse Drug Event Reporting System of the Food and Drug Administration. SETTING:Outpatient clinics and physicians' offices in the United States. PATIENT...
journal_title:Annals of internal medicine
pub_type: 杂志文章
doi:10.7326/0003-4819-118-11-199306010-00006
更新日期:1993-06-01 00:00:00
abstract:OBJECTIVE:To develop an early diagnostic test for pancreatic cancer based on the identification of K-ras mutations in pure pancreatic juice collected during endoscopic retrograde pancreatography. DESIGN:Prospective study with masked comparison. The standard criteria for the diagnosis of pancreatic cancer were pancreat...
journal_title:Annals of internal medicine
pub_type: 临床试验,杂志文章
doi:10.7326/0003-4819-123-3-199508010-00005
更新日期:1995-08-01 00:00:00
abstract::The content, role, and purpose of internal medicine, organized as an American specialty 100 years ago, have been marked by ambivalence from the beginning. Nevertheless, molded to a large extent by external events, including the strategic and symbolic importance of surgery in American medicine, the rise of university m...
journal_title:Annals of internal medicine
pub_type: 历史文章,杂志文章
doi:10.7326/0003-4819-105-4-592
更新日期:1986-10-01 00:00:00
abstract::Hepatocellular carcinoma is the most frequent cancer worldwide, responsible for approximately 1,000,000 deaths annually, most of them in the Far East and in sub-Saharan Africa. It usually presents at an advanced stage and has a poor prognosis. There is evidence of an etiologic role for hepatitis B virus infection in t...
journal_title:Annals of internal medicine
pub_type: 杂志文章,评审
doi:10.7326/0003-4819-108-3-390
更新日期:1988-03-01 00:00:00
abstract::Behavioral economics provides insights about the development of effective incentives for physicians to deliver high-value care. It suggests that the structure and delivery of incentives can shape behavior, as can thoughtful design of the decision-making environment. This article discusses several principles of behavio...
journal_title:Annals of internal medicine
pub_type: 杂志文章
doi:10.7326/M15-1330
更新日期:2016-01-19 00:00:00