Abstract:
BACKGROUND:Although survival is traditionally modeled using Cox proportional hazards modeling, this approach may be inappropriate in sepsis, in which the proportional hazards assumption does not hold. Newer, more flexible models, such as Gray's model, may be more appropriate. OBJECTIVES:To construct and compare Gray's model and two different Cox models in a large sepsis cohort. To determine whether hazards for death after sepsis were nonproportional. To explore how well the different survival modeling approaches describe these data. DESIGN:Analysis of combined data from the treatment and placebo arms of a large, negative, sepsis trial. SETTING:Intensive care units at 136 U.S. medical centers. SUBJECTS:A total of 1090 adults aged 18 yrs or older with signs and symptoms of severe sepsis and documented or probable Gram-negative infection. MEASUREMENTS:We considered 27 potential baseline risk factors and modeled survival over the 28 days after the onset of sepsis. We tested proportionality in single-variable Cox analysis using Schoenfeld residuals and log-log plots. We constructed a traditional multivariable Cox model, a multivariable Cox model with time-varying covariates, and a multivariable Gray's model. RESULTS:In single-variable analyses, 20 of the 27 potential factors were significantly associated with mortality, and 10 of 20 had nonproportional hazards. In multivariate analysis, all three models retained a very similar set of significant covariates (two models retained the identical set of nine variables, and the third differed only in that it retained the same nine plus a tenth variable). Four of the nine common covariates had nonproportional hazards. Of the three models, Gray's model best captured these changing hazard ratios over time. CONCLUSION:We confirm that many of the important predictors of mortality in severe sepsis are nonproportional and find that Gray's model seems best suited for modeling survival in this condition.
journal_name
Crit Care Medjournal_title
Critical care medicineauthors
Kasal J,Jovanovic Z,Clermont G,Weissfeld LA,Kaplan V,Watson RS,Angus DCdoi
10.1097/01.ccm.0000114819.37569.4bsubject
Has Abstractpub_date
2004-03-01 00:00:00pages
700-7issue
3eissn
0090-3493issn
1530-0293pii
00003246-200403000-00013journal_volume
32pub_type
杂志文章,多中心研究abstract:OBJECTIVE:To examine the accuracy of brain multimodal monitoring-consisting of intracranial pressure, brain tissue PO2, and cerebral microdialysis--in detecting cerebral hypoperfusion in patients with severe traumatic brain injury. DESIGN:Prospective single-center study. PATIENTS:Patients with severe traumatic brain ...
journal_title:Critical care medicine
pub_type: 杂志文章
doi:10.1097/CCM.0000000000000720
更新日期:2015-02-01 00:00:00
abstract:OBJECTIVE:Patients with severe sepsis have high mortality that is improved by timely, often expensive, treatments. Patients without insurance are more likely to delay seeking care; they may also receive less intense care. DESIGN:We performed a retrospective analysis of administrative database-Healthcare Costs and Util...
journal_title:Critical care medicine
pub_type: 杂志文章
doi:10.1097/01.ccm.0000435667.15070.9c
更新日期:2014-03-01 00:00:00
abstract:OBJECTIVE:Sepsis is a frequent cause of admission, but incidence rates based on administrative data have previously produced large differences in estimates. The aim of the study was to estimate the incidence of community-acquired sepsis based on patients' symptoms and clinical findings at arrival to the hospital. DESI...
journal_title:Critical care medicine
pub_type: 杂志文章
doi:10.1097/CCM.0000000000000611
更新日期:2015-01-01 00:00:00
abstract:OBJECTIVE:To determine daily amino acid and total protein losses in patients with acute renal failure receiving total parenteral nutrition (TPN) during treatment by continuous arteriovenous hemofiltration with hemodialysis (CAVHD). DESIGN:Prospective, nonrandomized study. SETTING:Patients in the ICU of a regional nep...
journal_title:Critical care medicine
pub_type: 杂志文章
doi:10.1097/00003246-199112000-00012
更新日期:1991-12-01 00:00:00
abstract:OBJECTIVE:To describe the experience of pediatric intensive care hospitalization from the perspective of a parents of children with severe, antecedent disability. DESIGN:Qualitative analysis of data obtained through semistructured interviews. SETTING:Pediatric intensive care unit (PICU) in a children's hospital. SUB...
journal_title:Critical care medicine
pub_type: 杂志文章
doi:10.1097/CCM.0b013e3181a00578
更新日期:2009-06-01 00:00:00
abstract:OBJECTIVES:To determine whether contemporary β-lactam anti-infective dosing recommendations in critically ill children achieve concentrations associated with maximal anti-infective activity. The secondary objective was to describe the microbiological and clinical outcomes associated with β-lactam therapeutic drug manag...
journal_title:Critical care medicine
pub_type: 杂志文章
doi:10.1097/CCM.0000000000002817
更新日期:2018-02-01 00:00:00
abstract:BACKGROUND:Intensive care units (ICUs) are recognized as stressful environments. However, the conditions in which stressors may affect health professionals' performance and well-being and the conditions that potentially lead to impaired performance and staff psychological distress are not well understood. OBJECTIVES:T...
journal_title:Critical care medicine
pub_type: 杂志文章
doi:10.1097/CCM.0b013e31819c1496
更新日期:2009-04-01 00:00:00
abstract:OBJECTIVE:To review how endogenous protein C activation might change in disease states and to discuss the implications of these findings in the context of severe sepsis. DATA SOURCE:A review of the published literature in PubMed together with data from abstracts from 2001 to present. DATA EXTRACTION AND SYNTHESIS:Act...
journal_title:Critical care medicine
pub_type: 杂志文章,评审
doi:10.1097/01.ccm.0000126125.79861.d3
更新日期:2004-05-01 00:00:00
abstract:OBJECTIVE:Nondepolarizing neuromuscular blocking agents are commonly used in the intensive care setting, but they have occasionally been associated with development of myopathy. In addition, diaphragmatic atrophy and a reduction in diaphragmatic force were reported after short-term controlled mechanical ventilation in ...
journal_title:Critical care medicine
pub_type: 杂志文章
doi:10.1097/01.CCM.0000245783.28478.AD
更新日期:2006-12-01 00:00:00
abstract::Serum ionized calcium (Ca+2), creatinine, magnesium, phosphate, and arterial pH were measured in patients on admission to the medical ICU (MICU). Patients were classified into three groups: a) hypotensive (n = 38), those who received vasopressor support for frank hypotension; b) hypertensive (n = 21), those who requir...
journal_title:Critical care medicine
pub_type: 杂志文章
doi:10.1097/00003246-198806000-00002
更新日期:1988-06-01 00:00:00
abstract:BACKGROUND:Although thrombocytopenia in the intensive care unit (ICU) is associated with a poorer outcome, the precise relationship between the time course of platelet counts and the mortality rate has not been well defined. OBJECTIVE:To describe the time course of the platelet count in relation to the mortality rate ...
journal_title:Critical care medicine
pub_type: 杂志文章,多中心研究
doi:10.1097/00003246-200204000-00005
更新日期:2002-04-01 00:00:00
abstract::The educational objectives in use in our Pediatric ICU are described. These have importance for educational programs in critical care medicine, in particular, where patient care needs can easily overwhelm educational needs. It is important not to overlook our role as teachers in the development of proper attitudes and...
journal_title:Critical care medicine
pub_type: 杂志文章
doi:10.1097/00003246-197705000-00008
更新日期:1977-05-01 00:00:00
abstract:OBJECTIVE:Exposure of neutrophils to low doses of bacterial lipopolysaccharides enhances their readiness to respond with inflammatory mediator generation including oxygen radical formation to a subsequently applied inflammatory stimulus ("priming"). In the present study, we investigated the role of lipid mediator synth...
journal_title:Critical care medicine
pub_type: 杂志文章
doi:10.1097/00003246-200210000-00020
更新日期:2002-10-01 00:00:00
abstract:OBJECTIVE:The neuroprotective effects of the noble gas xenon are well known. Argon, in contrast to xenon, is abundant, inexpensive, and therefore widely applicable. In this study, we analyzed the possible neuroprotective role of argon in an in vivo rat model of acute focal cerebral ischemia. DESIGN:Controlled laborato...
journal_title:Critical care medicine
pub_type: 杂志文章
doi:10.1097/CCM.0b013e31821209be
更新日期:2011-06-01 00:00:00
abstract:OBJECTIVE:To determine whether the absence or presence of clinical pharmacists in intensive care units (ICUs) results in differences in mortality rates, length of ICU stay, and ICU charges for Medicare patients with nosocomial-acquired infections, community-acquired infections, and sepsis. DESIGN, SETTING, AND PATIENT...
journal_title:Critical care medicine
pub_type: 杂志文章
doi:10.1097/CCM.0b013e31818f2269
更新日期:2008-12-01 00:00:00
abstract:OBJECTIVE:To determine the association of pulmonary artery catheter (PAC) use with in-hospital mortality. DESIGN:Prospective, observational study. SETTING:The medical intensive care units (MICU) of two teaching hospitals. METHODS:The study included 751 adults who were admitted to the MICU, excluding those who stayed...
journal_title:Critical care medicine
pub_type: 杂志文章
doi:10.1097/00003246-200106000-00010
更新日期:2001-06-01 00:00:00
abstract::Thirty-three patients underwent extensive cardiorespiratory monitoring during cardiac surgery. Recordings of measurements, with derived variables, were made preoperatively, postoperatively, and after extubation approximately 3 h after operation. The data provide a reference that allows decisions on whether the conditi...
journal_title:Critical care medicine
pub_type: 杂志文章
doi:
更新日期:1981-07-01 00:00:00
abstract:OBJECTIVES:In this study, we evaluated the inflammatory response in patients with severe acute respiratory infection due to the Middle East respiratory syndrome and non-Middle East respiratory syndrome and assessed the presence of distinct inflammatory subphenotypes using latent class analysis. DESIGN:Prospective coho...
journal_title:Critical care medicine
pub_type: 杂志文章
doi:10.1097/CCM.0000000000004724
更新日期:2021-02-01 00:00:00
abstract:OBJECTIVE:To determine whether partial liquid ventilation (PLV) affects the risk of nosocomial pneumonia. STUDY DESIGN:To assess in vitro bacterial adhesion and viability after liquid perfluorocarbon exposure and to assess bacterial recovery after partial liquid ventilation in vivo in rabbits. SETTING:University anim...
journal_title:Critical care medicine
pub_type: 杂志文章
doi:10.1097/00003246-199912000-00023
更新日期:1999-12-01 00:00:00
abstract:OBJECTIVE:Intrahospital transport of critically ill patients is often necessary for optimal patient care. However, transport of intensive care unit (ICU) patients within the hospital has been associated with a high rate of potentially detrimental complications. This study was designed to determine the occurrence rate o...
journal_title:Critical care medicine
pub_type: 杂志文章
doi:10.1097/00003246-199510000-00009
更新日期:1995-10-01 00:00:00
abstract:OBJECTIVES:Hepatic ischemia-reperfusion is a major clinical problem with limited treatment options. The pathophysiology of hepatic ischemia-reperfusion is characterized by mitochondrial dysfunction and cellular energy deficits. Sirtuin 1 is an energy-sensing enzyme known to modulate mitochondrial biogenesis. We hypothe...
journal_title:Critical care medicine
pub_type: 杂志文章
doi:10.1097/CCM.0000000000001637
更新日期:2016-08-01 00:00:00
abstract::Flow rates and pressure recording accuracy were compared for Argyle 14-, 16-, and 18-ga double-lumen and Edwards 7-Fr triple-lumen CVP catheters. Physiologic saline solution was pressure-infused into dogs through one lumen and CVP was measured via the other lumen. CVP accuracy was unaltered by simultaneous rapid infus...
journal_title:Critical care medicine
pub_type: 杂志文章
doi:10.1097/00003246-198507000-00017
更新日期:1985-07-01 00:00:00
abstract:OBJECTIVE:Quality of care for patients admitted with pneumonia varies across hospitals, but causes of this variation are poorly understood. Whether hospitals with high ICU utilization for patients with pneumonia provide better quality care is unknown. We sought to investigate the relationship between a hospital's ICU a...
journal_title:Critical care medicine
pub_type: 杂志文章
doi:10.1097/CCM.0000000000000925
更新日期:2015-06-01 00:00:00
abstract:OBJECTIVES:To review the difficulties associated with defining sepsis and its complications and to characterize the role of the proinflammatory cytokines in the development of human septic shock, adult respiratory distress syndrome, and the systemic inflammatory response syndrome. DATA SOURCES:Information presented at...
journal_title:Critical care medicine
pub_type: 杂志文章,评审
doi:
更新日期:1994-07-01 00:00:00
abstract:OBJECTIVES:To address the association between the 2003 heat wave in Paris (France) and the occurrence of out-of-hospital cardiac arrest. DESIGN:: An analysis of the interventions of the medical mobile intensive care units of the City of Paris for out-of-hospital cardiac arrest and prehospital myocardial infarctions, w...
journal_title:Critical care medicine
pub_type: 杂志文章
doi:10.1097/CCM.0b013e3181b0868f
更新日期:2009-12-01 00:00:00
abstract:OBJECTIVE:To assess the number of adult critical care beds in Asian countries and regions in relation to population size. DESIGN:Cross-sectional observational study. SETTING:Twenty-three Asian countries and regions, covering 92.1% of the continent's population. PARTICIPANTS:Ten low-income and lower-middle-income eco...
journal_title:Critical care medicine
pub_type: 杂志文章
doi:10.1097/CCM.0000000000004222
更新日期:2020-05-01 00:00:00
abstract:OBJECTIVES:Postresuscitation care bundle treatment after return of spontaneous circulation in patients experiencing in-hospital cardiac arrest can improve patients' survival and quality of life. The aim of the study was to evaluate the efficacy and safety of combined therapy of Shenfu injection and postresuscitation ca...
journal_title:Critical care medicine
pub_type: 杂志文章,多中心研究,随机对照试验
doi:10.1097/CCM.0000000000002570
更新日期:2017-10-01 00:00:00
abstract::This report documents the validity of clinical measurements of oxygen consumption (VO2) and carbon dioxide production (VCO2) made with a new metabolic gas monitor (MGM) suitable for use in critically ill patients receiving mechanical ventilatory support. Paired samples of inspired and expired gases were obtained, and ...
journal_title:Critical care medicine
pub_type: 杂志文章
doi:10.1097/00003246-198710000-00012
更新日期:1987-10-01 00:00:00
abstract::The disciplines of critical care and palliative care may initially seem to be polar opposites, yet they share fundamental features. Both focus on the sickest patients in the healthcare system. Each discipline's primary goal-extending life for critical care and comfort and quality of life for palliative care-represents...
journal_title:Critical care medicine
pub_type: 杂志文章,评审
doi:10.1097/01.CCM.0000237347.94229.23
更新日期:2006-11-01 00:00:00
abstract:BACKGROUND:Venous thromboembolic disease is among the most common causes of morbidity and mortality during pregnancy. The clinical evaluation alone is insufficient for the diagnosis of venous thromboembolic disease, and the normal pregnant state makes this evaluation even more challenging. DIAGNOSIS:Objective testing ...
journal_title:Critical care medicine
pub_type: 杂志文章,评审
doi:10.1097/01.ccm.0000183157.15533.4c
更新日期:2005-10-01 00:00:00