Research graph
References from A comparison of three comorbidity indexes in a head and neck cancer population. Local targets link to admitted publications; unresolved targets remain external evidence.
Use of comorbidity scores for control of confounding in studies using administrative databases
10.1093/ije/29.5.891 · 2000 · External reference
Validation of a combined comorbidity index [see comments]
10.1016/0895-4356(94)90129-5 · 1994 · External reference
A new method of classifying prognostic comorbidity in longitudinal studies
10.1016/0021-9681(87)90171-8 · 1987 · External reference
The importance of classifying initial co-morbidity in evaluating the outcome of diabetes mellitus
10.1016/0021-9681(74)90017-4 · 1974 · External reference
Comparing comorbid-illness indices assessing outcome variation
10.1007/bf02603483 · 1996 · External reference
Comorbidity measurement in elderly female breast cancer patients with administrative and medical records data
10.1016/s0895-4356(97)00050-4 · 1997 · External reference
Does comorbid disease interact with cancer? An epidemiologic analysis of mortality in a cohort of elderly breast cancer patients
10.1093/gerona/53a.5.m372 · 1998 · External reference
The impact of comorbidity and age on survival with laryngeal cancer
10.1177/014556139907800813 · 1999 · External reference
Validation of the Charlson comorbidity index in patients with head and neck cancer: a multi-institutional study
10.1097/00005537-199711000-00009 · 1997 · External reference
Adapting a clinical comorbidity index for use with ICD-9-CM administrative databases
10.1016/0895-4356(92)90133-8 · 1992 · External reference
Evaluation of two competing methods for calculating Charlson's comorbidity index when analyzing short-term mortality using administrative data
10.1016/s0895-4356(97)00091-7 · 1997 · External reference
New clinical severity staging system for cancer of the larynx. Five-year survival rates
10.1177/000348949410300201 · 1994 · External reference
Clinical-severity staging system for oropharyngeal cancer: five-year survival rates
10.1001/archotol.1997.01900100094013 · 1997 · External reference
Clinical-severity staging system for oral cavity cancer
10.1016/s0194-5998(99)70367-0 · 1999 · External reference
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Potential for cancer related health services research using a linked Medicare-tumor registry database
10.1097/00005650-199308000-00006 · 1993 · External reference
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A plain man's guide to the proportional hazards model
1982 · External reference
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1998 · External reference
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