HCUP Facts and Figures

TABLE OF CONTENTS

HIGHLIGHTS

INTRODUCTION

HCUP PARTNERS

1. OVERVIEW

2. DIAGNOSES

3. PROCEDURES

4. COSTS

5. PAYERS

SOURCES/METHODS

DEFINITIONS

FOR MORE INFO

ACKNOWLEDGMENTS

CITATION

FACTS & FIGURES 2007 PDF

EXHIBIT 2.4 Most Frequent Comorbidities PDF

Top comorbidities and percent of discharges with specific comorbidity, 2007. Bar chart. Percent distribution. Hypertension: 35%; fluid and electrolyte disorders: 16%; chronic pulmonary disease: 14%; diabetes, uncomplicated: 14%; deficiency anemias: 11%; renal failure: 7%; hypothyroidism: 7%; depression: 7%; congestive heart failure: 6%; obesity: 6%; peripheral vascular disorders: 4%; alcohol abuse: 3%; diabetes with chronic complications: 3%; drug abuse: 3%; psychoses: 3%; valvular disease: 3%; coagulopathy: 2%; chronic blood loss anemia: 2%; weight loss: 2%; rheumatoid arthritis/collagen vascular diseases: 2%.
Note: Comorbidities are based on a classification of ICD-9-CM codes which is distinct from the Clinical Classification System.

Comorbidities ⁵ are chronic disorders that are not the primary reason for hospitalization, but which may influence the course of hospitalization.

Hypertension was a comorbidity in 35 percent of all hospital stays in 2007.
Fluid and electrolyte disorders were comorbidities in 16 percent of hospital stays.
Mental health conditions were among the top comorbidities in 2007, occurring singly or in combination with other mental health conditions. Depression occurred as a comorbid condition in 7 percent of stays in 2007 and alcohol abuse, drug abuse, and/or psychoses were each present in 3 percent of stays.
Diabetes, both uncomplicated and with chronic complications, were comorbidities in 17 percent of all stays.
Other notable comorbidities included chronic pulmonary disease, anemia, renal failure, hypothyroidism, congestive heart failure, and obesity.

⁵Comorbidities are different from secondary conditions, as secondary conditions may be directly related to the principal reason for hospitalization while comorbidities are not. For example, retinopathy may be a secondary condition in a hospital stay in which the principal diagnosis is diabetes. However, retinopathy would not be considered a comorbidity of diabetes, as it is a related condition.

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