Published in PLoS One on October 27, 2016
A new method of classifying prognostic comorbidity in longitudinal studies: development and validation. J Chronic Dis (1987) 174.79
Evaluating the added predictive ability of a new marker: from area under the ROC curve to reclassification and beyond. Stat Med (2008) 57.29
Comorbidity measures for use with administrative data. Med Care (1998) 46.67
Use and misuse of the receiver operating characteristic curve in risk prediction. Circulation (2007) 20.44
Validation of information recorded on general practitioner based computerised data resource in the United Kingdom. BMJ (1991) 17.91
Extensions of net reclassification improvement calculations to measure usefulness of new biomarkers. Stat Med (2010) 14.49
Validation and validity of diagnoses in the General Practice Research Database: a systematic review. Br J Clin Pharmacol (2010) 10.70
Diabetes mellitus, fasting glucose, and risk of cause-specific death. N Engl J Med (2011) 10.33
The limitations of risk factors as prognostic tools. N Engl J Med (2006) 5.90
Statins and the risk of dementia. Lancet (2000) 5.65
Updating and validating the Charlson comorbidity index and score for risk adjustment in hospital discharge abstracts using data from 6 countries. Am J Epidemiol (2011) 5.41
Antibiotics and risk of subsequent first-time acute myocardial infarction. JAMA (1999) 5.37
Risk assessment after acute upper gastrointestinal haemorrhage. Gut (1996) 5.02
Data Resource Profile: Clinical Practice Research Datalink (CPRD). Int J Epidemiol (2015) 4.87
A chronic disease score with empirically derived weights. Med Care (1995) 4.34
Inflammatory bowel disease is not associated with an increased risk of lymphoma. Gastroenterology (2001) 4.28
Lower risk of thromboembolic cardiovascular events with naproxen among patients with rheumatoid arthritis. Arch Intern Med (2002) 3.24
Survival in COPD patients after regular use of fluticasone propionate and salmeterol in general practice. Eur Respir J (2002) 3.22
A note on the evaluation of novel biomarkers: do not rely on integrated discrimination improvement and net reclassification index. Stat Med (2013) 3.03
Adaptation and validation of the Charlson Index for Read/OXMIS coded databases. BMC Fam Pract (2010) 2.93
Use of the General Practice Research Database (GPRD) for respiratory epidemiology: a comparison with the 4th Morbidity Survey in General Practice (MSGP4). Thorax (1999) 2.91
Comorbidities affect risk of nonvariceal upper gastrointestinal bleeding. Gastroenterology (2013) 2.48
How accurate are diagnoses for rheumatoid arthritis and juvenile idiopathic arthritis in the general practice research database? Arthritis Rheum (2008) 2.27
Estimating the prevalence of diagnosed diabetes in a health district of Wales: the importance of using primary and secondary care sources of ascertainment with adjustment for death and migration. Diabet Med (2000) 2.13
Validity of cancer diagnosis in a primary care database compared with linked cancer registrations in England. Population-based cohort study. Cancer Epidemiol (2012) 1.89
Determining the predictive value of Read/OXMIS codes to identify incident acute myocardial infarction in the General Practice Research Database. Pharmacoepidemiol Drug Saf (2008) 1.85
Correcting for optimistic prediction in small data sets. Am J Epidemiol (2014) 1.69
Diagnosis and initial management of stroke and transient ischemic attack across UK health regions from 1992 to 1996: experience of a national primary care database. Stroke (2001) 1.61
Triptans in migraine: the risks of stroke, cardiovascular disease, and death in practice. Neurology (2004) 1.58
5-aminosalicylic acids and the risk of renal disease: a large British epidemiologic study. Gastroenterology (2004) 1.57
Identifying adverse events of vaccines using a Bayesian method of medically guided information sharing. Drug Saf (2012) 1.46
Incidence and prevalence of cirrhosis in the United Kingdom, 1992-2001: a general population-based study. J Hepatol (2008) 1.29
Prevalence and incidence of Wegener's granulomatosis in the UK general practice research database. Arthritis Rheum (2009) 1.24
Metformin, other antidiabetic drugs, and risk of Alzheimer's disease: a population-based case-control study. J Am Geriatr Soc (2012) 1.22
Excess long-term mortality following non-variceal upper gastrointestinal bleeding: a population-based cohort study. PLoS Med (2013) 1.19
Estimation of the prevalence of diagnosed diabetes from primary care and secondary care source data: comparison of record linkage with capture-recapture analysis. J Epidemiol Community Health (2002) 1.12
Hyperlipidaemia, statin use and the risk of developing rheumatoid arthritis. Ann Rheum Dis (2008) 1.08
Antidiabetic drugs and heart failure risk in patients with type 2 diabetes in the U.K. primary care setting. Diabetes Care (2005) 1.07
Defining upper gastrointestinal bleeding from linked primary and secondary care data and the effect on occurrence and 28 day mortality. BMC Health Serv Res (2012) 1.05
Predicting survival in adults with end-stage renal disease: an age equivalence index. Ann Intern Med (1982) 1.04
Diagnosis of liver cirrhosis in England, a cohort study, 1998-2009: a comparison with cancer. Am J Gastroenterol (2014) 0.95
Postmenopausal estrogen replacement therapy and the risk of Alzheimer disease. Arch Neurol (2001) 0.93
Uncomplicated peptic ulcer in the UK: trends from 1997 to 2005. Aliment Pharmacol Ther (2009) 0.93
Use of dexfenfluramine, fenfluramine and phentermine and the risk of stroke. Br J Clin Pharmacol (1999) 0.89
Improved incidence estimates from linked vs. stand-alone electronic health records. J Clin Epidemiol (2016) 0.83
Non-steroidal anti-inflammatory drugs and risk of first hospital admission for heart failure in the general population. Heart (2006) 0.81
Adult height and cryptogenic fibrosing alveolitis: a case-control study using the UK general practice research database. Thorax (2000) 0.80
Mortality Risk Prediction: Can Comorbidity Indices Be Improved With Psychosocial Data? Med Care (2015) 0.79
A comparison of the recording of comorbidity in primary and secondary care by using the Charlson Index to predict short-term and long-term survival in a routine linked data cohort. BMJ Open (2015) 0.78