Predictors of health status do not change over three-year periods and exacerbation makes difference in chronic obstructive pulmonary disease

Health and Quality of Life Outcomes

Irma Godoy¹  Cristiane R Naves¹  Laura MO Caram¹  Suzana E Tanni¹  Renata Ferrari¹ 

[1] Faculdade de Medicina, UNESP-Univ Estadual Paulista, Campus de Botucatu, Departamento de Clínica Médica, Botucatu, SP, Brasil

关键词: dyspnea;    BODE index;    Health status;    COPD;   

Others  :  826161
DOI  :  10.1186/1477-7525-9-112

 received in 2011-05-30, accepted in 2011-12-09,  发布年份 2011

【 摘 要 】

Background

The association between disease markers and health status (HS) overtime is unclear. The aim of this study was to verify the predictors of HS at baseline and after three years in Chronic Obstructive Pulmonary Disease (COPD) patients.

Methods

Ninety-five consecutive COPD patients (66% male, age = 67 ± 9 y, FEV₁ = 58 ± 23%) underwent the following evaluations at baseline and after three years: body composition, pulse oximetry (SpO₂), six-minute walk distance (6MWD), Modified edical Research Council dyspnea scale (MMRC) and Saint George's Respiratory Questionnaire (SGRQ). The Charlson comorbidity index and BODE index were calculated. COPD exacerbations during the follow-up were evaluated. At baseline, age, gender, smoking, SpO₂, BODE index or its components (BMI, MMRC, FEV₁ and 6MWD), and Charlson index were included in a multiple linear regression analysis with the baseline SGRQ total score as the dependent variable. After three years, we included the final values of the variables plus the number of exacerbations and the final SGRQ total score as the dependent variable.

Results

SGRQ total score (42 ± 19% vs 44 ± 19%; p = 0.041) and activity domain (52 ± 21% vs 60 ± 22%; p < 0.001) deteriorated during follow-up. At baseline, BODE index was selected as a predictor of SGRQ total score (R² = 0.46; p < 0.001); after three years, BODE index and age were the predictors (R² = 0.49; p < 0.001). When the BODE index was replaced by its variables, MMRC was selected as the only variable associated with the SGRQ total score (R² = 0.58; p < 0.001). After three years, MMRC, FEV₁ and number of exacerbations were selected as predictors of SGRQ total score (R² = 0.63; p < 0.001).

Conclusion

HS deteriorated significantly over the three-year period and the predictors of HS do not change over time. BODE index and dyspnea were predictors at baseline and after three years. Exacerbation was also a predictor of HS after three years.

Trial Registration

ClinicalTrials.gov:NCT00605540

【 授权许可】

   
2011 Ferrari et al; licensee BioMed Central Ltd.

【 图 表 】

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