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A multidimensional grading system (BODE index) as predictor of hospitalization for COPD
Kian-Chung Ong1, Arul Earnest, Suat-Jin Lu
1Department of Respiratory Medicine, Tan Tock Seng Hospital, 11 Jalan Tan Tock Seng, Singapore 308433. kian_chung_ong@ttsh.com.sg
Chest
|December 16, 2005
Summary
The BODE index, incorporating body mass index, airflow obstruction, dyspnea, and exercise capacity, is a superior predictor of COPD hospitalizations compared to FEV1 alone. This comprehensive staging system offers improved prognostic accuracy for patients with chronic obstructive pulmonary disease.
Area of Science:
- Pulmonary Medicine
- Clinical Epidemiology
Background:
- Chronic Obstructive Pulmonary Disease (COPD) poses a significant burden, with frequent hospitalizations impacting patient outcomes and healthcare costs.
- Predicting COPD exacerbations and hospital admissions is crucial for effective patient management and resource allocation.
Purpose of the Study:
- To evaluate the BODE (body mass index, airflow obstruction, dyspnea, and exercise capacity) index's efficacy in predicting COPD-related hospitalizations.
- To compare the predictive power of the BODE index against FEV1 (forced expiratory volume in 1 second) alone.
Main Methods:
- A historical cohort study involving 127 COPD patients from a university-affiliated hospital outpatient clinic.
- The BODE index was calculated at enrollment, and patients were followed for a mean of 16.2 months to record COPD hospital admissions.
- Poisson regression analysis was employed to compare the predictive performance of the BODE index and FEV1.
Main Results:
- The BODE index demonstrated a significant association with the number of hospital admissions (IRR, 1.20; p < 0.001).
- FEV1 also showed a significant but weaker association with hospital admissions (IRR, 0.08; p < 0.001).
- The BODE index outperformed the Global Initiative for Chronic Obstructive Lung Disease (GOLD) staging system based on FEV1 in predicting hospitalizations (pseudo r2 of 0.16 vs. 0.04).
Conclusions:
- The BODE staging system, integrating FEV1 with other clinical and physiological parameters, provides a more accurate prediction of hospitalization for COPD.
- This comprehensive index aids in better risk stratification and management of patients with chronic obstructive pulmonary disease.