Articles
48 result(s) for 'statistics review ball' within Critical Care
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Citation: Critical Care 2002 7:8
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Erratum to: Statistics review 3: Hypothesis testing and Pvalues
Citation: Critical Care 2002 7:15 -
Statistics review 8: Qualitative data – tests of association
This review introduces methods for investigating relationships between two qualitative (categorical) variables. The χ2 test of association is described, together with the modifications needed for small samples. T...
Citation: Critical Care 2003 8:46 -
Statistics review 13: Receiver operating characteristic curves
This review introduces some commonly used methods for assessing the performance of a diagnostic test. The sensitivity, specificity and likelihood ratio of a test are discussed. The uses of the receiver operati...
Citation: Critical Care 2004 8:508 -
Statistics review 11: Assessing risk
Relative risk and odds ratio have been introduced in earlier reviews (see Statistics reviews 3, 6 and 8). This review describes the calculation and interpretation of their confidence intervals. The different c...
Citation: Critical Care 2004 8:287 -
Statistics review 10: Further nonparametric methods
This review introduces nonparametric methods for testing differences between more than two groups or treatments. Three of the more common tests are described in detail, together with multiple comparison proced...
Citation: Critical Care 2004 8:196 -
Introducing Critical Care Forum's ongoing review of medical statistics
Statistics is increasingly used in all fields of medicine but is often poorly understood and incorrectly applied. Critical Care is therefore launching a series of articles aimed at providing a simple introduction...
Citation: Critical Care 2002 6:3 -
Statistics review 5: Comparison of means
The present review introduces the commonly used t-test, used to compare a single mean with a hypothesized value, two means arising from paired data, or two means arising from unpaired data. The assumptions und...
Citation: Critical Care 2002 6:424 -
Statistics review 12: Survival analysis
This review introduces methods of analyzing data arising from studies where the response variable is the length of time taken to reach a certain end-point, often death. The Kaplan–Meier methods, log rank test ...
Citation: Critical Care 2004 8:389 -
Statistics review 14: Logistic regression
This review introduces logistic regression, which is a method for modelling the dependence of a binary response variable on one or more explanatory variables. Continuous and categorical explanatory variables a...
Citation: Critical Care 2005 9:112 -
Statistics review 1: Presenting and summarising data
The present review is the first in an ongoing guide to medical statistics, using specific examples from intensive care. The first step in any analysis is to describe and summarize the data. As well as becoming...
Citation: Critical Care 2001 6:66 -
Statistics review 9: One-way analysis of variance
This review introduces one-way analysis of variance, which is a method of testing differences between more than two groups or treatments. Multiple comparison procedures and orthogonal contrasts are described a...
Citation: Critical Care 2004 8:130 -
Statistics review 2: Samples and populations
The previous review in this series introduced the notion of data description and outlined some of the more common summary measures used to describe a dataset. However, a dataset is typically only of interest f...
Citation: Critical Care 2002 6:143 -
Statistics review 4: Sample size calculations
The present review introduces the notion of statistical power and the hazard of under-powered studies. The problem of how to calculate an ideal sample size is also discussed within the context of factors that ...
Citation: Critical Care 2002 6:335 -
Statistics review 7: Correlation and regression
The present review introduces methods of analyzing the relationship between two quantitative variables. The calculation and interpretation of the sample product moment correlation coefficient and the linear re...
Citation: Critical Care 2003 7:451 -
Statistics review 3: Hypothesis testing and P values
The present review introduces the general philosophy behind hypothesis (significance) testing and calculation of P values. Guidelines for the interpretation of P values are also provided in the context of a publi...
Citation: Critical Care 2002 6:222 -
Statistics review 6: Nonparametric methods
The present review introduces nonparametric methods. Three of the more common nonparametric methods are described in detail, and the advantages and disadvantages of nonparametric versus parametric methods in g...
Citation: Critical Care 2002 6:509 -
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Citation: Critical Care 2013 17(Suppl 2):P441 -
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Citation: Critical Care 2013 17(Suppl 2):P65 -
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Citation: Critical Care 2013 17(Suppl 2):P438 -
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Citation: Critical Care 2013 17(Suppl 2):P268 -
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Citation: Critical Care 2013 17(Suppl 2):P384 -
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Citation: Critical Care 2013 17(Suppl 2):P350 -
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Citation: Critical Care 2001 5(Suppl 1):P022 -
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Citation: Critical Care 2007 11(Suppl 2):P231 -
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Citation: Critical Care 2007 11(Suppl 2):P337 -
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Citation: Critical Care 2007 11(Suppl 2):P483 -
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Citation: Critical Care 2006 10(Suppl 1):P28 -
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Citation: Critical Care 2006 10(Suppl 1):P13 -
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Citation: Critical Care 2006 10(Suppl 1):P416 -
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Citation: Critical Care 2005 9(Suppl 1):P367 -
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Citation: Critical Care 2005 9(Suppl 1):P339 -
38th International Symposium on Intensive Care and Emergency Medicine
Citation: Critical Care 2018 22(Suppl 1):82 -
Risk factors for intra-abdominal hypertension and abdominal compartment syndrome among adult intensive care unit patients: a systematic review and meta-analysis
Although intra-abdominal hypertension (IAH) and abdominal compartment syndrome (ACS) are associated with substantial morbidity and mortality among critically ill adults, it remains unknown if prevention or tre...
Citation: Critical Care 2013 17:R249 -
Chest dual-energy CT to assess the effects of steroids on lung function in severe COVID-19 patients
Steroids have been shown to reduce inflammation, hypoxic pulmonary vasoconstriction (HPV) and lung edema. Based on evidence from clinical trials, steroids are widely used in severe COVID-19. However, the effec...
Citation: Critical Care 2022 26:328 -
A quantitative analysis of extension and distribution of lung injury in COVID-19: a prospective study based on chest computed tomography
Typical features differentiate COVID-19-associated lung injury from acute respiratory distress syndrome. The clinical role of chest computed tomography (CT) in describing the progression of COVID-19-associated...
Citation: Critical Care 2021 25:276 -
The sit-to-stand test as a patient-centered functional outcome for critical care research: a pooled analysis of five international rehabilitation studies
With ICU mortality rates decreasing, it is increasingly important to identify interventions to minimize functional impairments and improve outcomes for survivors. Simultaneously, we must identify robust patien...
Citation: Critical Care 2022 26:175 -
Physiological effects of lung-protective ventilation in patients with lung fibrosis and usual interstitial pneumonia pattern versus primary ARDS: a matched-control study
Although patients with interstitial pneumonia pattern (ILD-UIP) and acute exacerbation (AE) leading to severe acute respiratory failure may require invasive mechanical ventilation (MV), physiological data on l...
Citation: Critical Care 2023 27:398 -
Computed tomography assessment of PEEP-induced alveolar recruitment in patients with severe COVID-19 pneumonia
There is a paucity of data concerning the optimal ventilator management in patients with COVID-19 pneumonia; particularly, the optimal levels of positive-end expiratory pressure (PEEP) are unknown. We aimed to...
Citation: Critical Care 2021 25:81 -
Lung distribution of gas and blood volume in critically ill COVID-19 patients: a quantitative dual-energy computed tomography study
Critically ill COVID-19 patients have pathophysiological lung features characterized by perfusion abnormalities. However, to date no study has evaluated whether the changes in the distribution of pulmonary gas...
Citation: Critical Care 2021 25:214 -
Nasal pressure swings as the measure of inspiratory effort in spontaneously breathing patients with de novo acute respiratory failure
Excessive inspiratory effort could translate into self-inflicted lung injury, thus worsening clinical outcomes of spontaneously breathing patients with acute respiratory failure (ARF). Although esophageal mano...
Citation: Critical Care 2022 26:70 -
Effects of positive end-expiratory pressure on lung ultrasound patterns and their correlation with intracranial pressure in mechanically ventilated brain injured patients
The effects of positive end-expiratory pressure (PEEP) on lung ultrasound (LUS) patterns, and their relationship with intracranial pressure (ICP) in brain injured patients have not been completely clarified. T...
Citation: Critical Care 2022 26:31 -
The clinical relevance of oliguria in the critically ill patient: analysis of a large observational database
Urine output is widely used as one of the criteria for the diagnosis and staging of acute renal failure, but few studies have specifically assessed the role of oliguria as a marker of acute renal failure or ou...
Citation: Critical Care 2020 24:171 -
Temporal changes in the epidemiology, management, and outcome from acute respiratory distress syndrome in European intensive care units: a comparison of two large cohorts
Mortality rates for patients with ARDS remain high. We assessed temporal changes in the epidemiology and management of ARDS patients requiring invasive mechanical ventilation in European ICUs. We also investig...
Citation: Critical Care 2021 25:87 -
Pneumocystis jirovecii pneumonia in intensive care units: a multicenter study by ESGCIP and EFISG
Pneumocystis jirovecii pneumonia (PJP) is an opportunistic, life-threatening disease commonly affecting immunocompromised patients. The distribution of predisposing diseases or conditions in critically ill patien...
Citation: Critical Care 2023 27:323 -
Relationship between the Clinical Frailty Scale and short-term mortality in patients ≥ 80 years old acutely admitted to the ICU: a prospective cohort study
The Clinical Frailty Scale (CFS) is frequently used to measure frailty in critically ill adults. There is wide variation in the approach to analysing the relationship between the CFS score and mortality after ...
Citation: Critical Care 2021 25:231 -
Clinical risk factors for increased respiratory drive in intubated hypoxemic patients
There is very limited evidence identifying factors that increase respiratory drive in hypoxemic intubated patients. Most physiological determinants of respiratory drive cannot be directly assessed at the bedsi...
Citation: Critical Care 2023 27:138 -
22nd International Symposium on Intensive Care and Emergency Medicine, Brussels, Belgium, 19–22 March 2002
Citation: Critical Care 2002 6:264
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- ISSN: 1364-8535 (electronic)