| A new method of classifying prognostic comorbidity in longitudinal studies: development and validation | Journal of Chronic Diseases | 1987 | 31.8K |
| Clinical Characteristics of 138 Hospitalized Patients With 2019 Novel Coronavirus-Infected Pneumonia in Wuhan, China | JAMA - Journal of the American Medical Association | 2020 | 12.6K |
| Frailty in older adults: evidence for a phenotype | Journals of Gerontology - Series A Biological Sciences and Medical Sciences | 2001 | 11.6K |
| The Third International Consensus Definitions for Sepsis and Septic Shock (Sepsis-3) | JAMA - Journal of the American Medical Association | 2016 | 9.7K |
| Lifetime and 12-month prevalence of DSM-III-R psychiatric disorders in the United States. Results from the National Comorbidity Survey | Archives of General Psychiatry | 1994 | 9.1K |
| Prevalence, severity, and comorbidity of 12-month DSM-IV disorders in the National Comorbidity Survey Replication | Archives of General Psychiatry | 2005 | 7.7K |
| Epidemiology of severe sepsis in the United States: analysis of incidence, outcome, and associated costs of care | Critical Care Medicine | 2001 | 7K |
| Posttraumatic stress disorder in the National Comorbidity Survey | Archives of General Psychiatry | 1995 | 6.9K |
| Comorbidity measures for use with administrative data | Medical Care | 1998 | 6.3K |
| Coding algorithms for defining comorbidities in ICD-9-CM and ICD-10 administrative data | Medical Care | 2005 | 6K |
| The epidemiology of major depressive disorder: results from the National Comorbidity Survey Replication (NCS-R) | JAMA - Journal of the American Medical Association | 2003 | 5.5K |
| Global strategy for the diagnosis, management, and prevention of chronic obstructive pulmonary disease: GOLD executive summary | American Journal of Respiratory and Critical Care Medicine | 2007 | 5.2K |
| Presenting Characteristics, Comorbidities, and Outcomes Among 5700 Patients Hospitalized With COVID-19 in the New York City Area | JAMA - Journal of the American Medical Association | 2020 | 5K |
| Years lived with disability (YLDs) for 1160 sequelae of 289 diseases and injuries 1990-2010: a systematic analysis for the Global Burden of Disease Study 2010 | Lancet, The | 2012 | 4.9K |
| Bariatric surgery: a systematic review and meta-analysis | JAMA - Journal of the American Medical Association | 2004 | 4.9K |
| Risk Factors Associated With Acute Respiratory Distress Syndrome and Death in Patients With Coronavirus Disease 2019 Pneumonia in Wuhan, China | JAMA Internal Medicine | 2020 | 4.4K |
| Validation of a combined comorbidity index | Journal of Clinical Epidemiology | 1994 | 4.2K |
| Frailty in elderly people | Lancet, The | 2013 | 4K |
| Global, regional, and national incidence, prevalence, and years lived with disability for 301 acute and chronic diseases and injuries in 188 countries, 1990-2013: a systematic analysis for the Global Burden of Disease Study 2013 | Lancet, The | 2015 | 3.7K |
| Global, regional, and national incidence, prevalence, and years lived with disability for 310 diseases and injuries, 1990-2015: a systematic analysis for the Global Burden of Disease Study 2015 | Lancet, The | 2016 | 3.7K |
| A global clinical measure of fitness and frailty in elderly people | Cmaj | 2005 | 3.7K |
| Global strategy for the diagnosis, management, and prevention of chronic obstructive pulmonary disease: GOLD executive summary | American Journal of Respiratory and Critical Care Medicine | 2013 | 3.6K |
| Lifetime prevalence of mental disorders in U.S. adolescents: results from the National Comorbidity Survey Replication--Adolescent Supplement (NCS-A) | Journal of the American Academy of Child and Adolescent Psychiatry | 2010 | 3.6K |
| Epidemiology of multimorbidity and implications for health care, research, and medical education: a cross-sectional study | Lancet, The | 2012 | 3.3K |
| Cancer treatment and survivorship statistics, 2016 | Ca-A Cancer Journal for Clinicians | 2016 | 3.2K |
