A validation of the National Early Warning Score to predict outcome in patients with COPD exacerbation

NCEPOD. National Confidential Enquiry in to Patient Outcome and Death, 2012, Time to intervene?

Hillman, 2002, Duration of life-threatening antecedents prior to intensive care admission, Intensive Care Med, 28, 1629, 10.1007/s00134-002-1496-y

Duckitt, 2007, Worthing physiological scoring system: derivation and validation of a physiological early-warning system for medical admissions. An observational, population-based single-centre study, Br J Anaesth, 98, 769, 10.1093/bja/aem097

Prytherch, 2010, ViEWS—Towards a national early warning score for detecting adult inpatient deterioration, Resuscitation, 81, 932, 10.1016/j.resuscitation.2010.04.014

Physicians RCo. National Early Warning Score (NEWS) Standardising the assessment of acute-illness severity in the NHS—Report of a working party. London, 2012.

Eccles, 2014, CREWS: improving specificity whilst maintaining sensitivity of the National Early Warning Score in patients with chronic hypoxaemia, Resuscitation, 85, 109, 10.1016/j.resuscitation.2013.08.277

O'Driscoll, 2013, Concerns regarding the design of the bedside monitoring chart for use with the NEWS (National Early Warning System), Clin Med, 13, 319, 10.7861/clinmedicine.13-3-319

NICE, 2010, CG101 Chronic obstructive pulmonary disease (update): full guideline

Hospital Episode Statistics, Admitted Patient Care, England—2012–2013, 2013.

Moons, 2015, Transparent Reporting of a multivariable prediction model for Individual Prognosis or Diagnosis (TRIPOD): explanation and elaboration, Ann Intern Med, 162, W1, 10.7326/M14-0698

WHO, 2010, WHO International Statistical Classification of Diseases and Related Health Problems

Hosmer, 1989, Applied logistic regression, 187

Kramer, 2007, Assessing the calibration of mortality benchmarks in critical care: The Hosmer-Lemeshow test revisited, Crit Care Med, 35, 2052, 10.1097/01.CCM.0000275267.64078.B0

Kellett, 2012, Validation of an abbreviated Vitalpac™ Early Warning Score (ViEWS) in 75,419 consecutive admissions to a Canadian regional hospital, Resuscitation, 83, 297, 10.1016/j.resuscitation.2011.08.022

Bleyer, 2011, Longitudinal analysis of one million vital signs in patients in an academic medical center, Resuscitation, 82, 1387, 10.1016/j.resuscitation.2011.06.033

Opio, 2013, Validation of the VitalPAC Early Warning Score (ViEWS) in acutely ill medical patients attending a resource-poor hospital in sub-Saharan Africa, Resuscitation, 84, 743, 10.1016/j.resuscitation.2013.02.007

Dawes, 2014, Introduction of an electronic physiological early warning system: effects on mortality and length of stay, Br J Anaesth, 113, 603, 10.1093/bja/aeu107

Blunt, Trends in emergency admissions in England 2004–2009: is greater efficiency breeding inefficiency?

BTS, 2015, COPD: Who cares matters. National Chronic Obstructive Pulmonary Disease (COPD) Audit Programme: Clinical audit of COPD exacerbations admitted to acute units in England and Wales 2014

Prieto-Centurion, 2014, Multicenter study comparing case definitions used to identify patients with chronic obstructive pulmonary disease, Am J Respir Crit Care Med, 190, 989, 10.1164/rccm.201406-1166OC

Miller, 2015, Chronic obstructive pulmonary disease: missed diagnosis versus misdiagnosis, BMJ, 351, h3021, 10.1136/bmj.h3021

Quint, 2014, Validation of chronic obstructive pulmonary disease recording in the Clinical Practice Research Datalink (CPRD-GOLD), BMJ Open, 4, e005540, 10.1136/bmjopen-2014-005540

Statistics OfN, 2007, Mortality Statistics Series DH1 no 38

Moons, 1997, Limitations of sensitivity, specificity, likelihood ratio, and Bayes’ theorem in assessing diagnostic probabilities: a clinical example, Epidemiology, 8, 12, 10.1097/00001648-199701000-00002

Mallett, 2014, Exploration of analysis methods for diagnostic imaging tests: problems with ROC AUROC and confidence scores in CT colonography, PLoS ONE, 9, e107633, 10.1371/journal.pone.0107633

Cook, 2007, Use and misuse of the receiver operating characteristic curve in risk prediction, Circulation, 115, 928, 10.1161/CIRCULATIONAHA.106.672402

Vickers, 2006, Decision curve analysis: a novel method for evaluating prediction models, Med Decis Making, 26, 565, 10.1177/0272989X06295361

Singanayagam, 2013, Predictors of mortality in hospitalized adults with acute exacerbation of chronic obstructive pulmonary disease, Ann Am Thorac Soc, 10, 81, 10.1513/AnnalsATS.201208-043OC

Roche, 2008, Predictors of outcomes in COPD exacerbation cases presenting to the emergency department, Eur Respir J, 32, 953, 10.1183/09031936.00129507

Ruiz-González, 2008, C-reactive protein and other predictors of poor outcome in patients hospitalized with exacerbations of chronic obstructive pulmonary disease, Respirology, 13, 1028, 10.1111/j.1440-1843.2008.01403.x

Tabak, 2009, Mortality and need for mechanical ventilation in acute exacerbations of chronic obstructive pulmonary disease: development and validation of a simple risk score, Arch Intern Med, 169, 1595, 10.1001/archinternmed.2009.270

Steer, 2012, The DECAF Score: predicting hospital mortality in exacerbations of chronic obstructive pulmonary disease, Thorax, 67, 970, 10.1136/thoraxjnl-2012-202103

Asiimwe, 2011, Routine laboratory tests can predict in-hospital mortality in acute exacerbations of COPD, Lung, 189, 225, 10.1007/s00408-011-9298-z

Tabak, 2013, Development and validation of a mortality risk-adjustment model for patients hospitalized for exacerbations of chronic obstructive pulmonary disease, Med Care, 51, 597, 10.1097/MLR.0b013e3182901982

Stiell, 2014, Clinical characteristics associated with adverse events in patients with exacerbation of chronic obstructive pulmonary disease: a prospective cohort study, CMAJ, 186, E193, 10.1503/cmaj.130968

Quintana, 2014, Predictive score for mortality in patients with COPD exacerbations attending hospital emergency departments, BMC Med, 12, 66, 10.1186/1741-7015-12-66

Kawamoto, 2005, Improving clinical practice using clinical decision support systems: a systematic review of trials to identify features critical to success, BMJ, 330, 765, 10.1136/bmj.38398.500764.8F

Roche, 2014, A clinical in-hospital prognostic score for acute exacerbations of COPD, Respir Res, 15, 99, 10.1186/s12931-014-0099-9

Shorr, 2011, Validation of a novel risk score for severity of illness in acute exacerbations of COPD, Chest, 140, 1177, 10.1378/chest.10-3035

Hu, 2015, The Pneumonia Severity Index as a Predictor of In-Hospital Mortality in Acute Exacerbation of Chronic Obstructive Pulmonary Disease, PLoS ONE, 10, e0133160, 10.1371/journal.pone.0133160

Echevarria, 2016, Validation of the DECAF score to predict hospital mortality in acute exacerbations of COPD, Thorax, 71, 133, 10.1136/thoraxjnl-2015-207775

O'Driscoll, 2008, BTS guideline for emergency oxygen use in adult patients, Thorax, 63, vi1