Limitação nas atividades de vida diária e qualidade de vida segundo a classificação combinada da doença pulmonar obstrutiva crônica

Abstract

The Global Initiative for Chronic Obstructive Lung Disease (GOLD), in its 2011 update, began to recommend that the management and treatment of COPD were made to combine the impact of disease and future risk of exacerbations. These subjects have limitations in activities of daily living (ADL) performing, which may manifest as a decrease in oxygen saturation (SpO2) and progressive dyspnea. These limitations may be associated with worsening of quality of life. Thus, this study aims to verify whether the COPD combined classification, proposed by GOLD 2011, is able to differentiate subjects with ADL limitations, such as desaturation and dyspnea, and impaired quality of life. We intend to compare the quality of life, dyspnea and desaturation ADL among groups stratified by GOLD 2011. This is an observational, cross-sectional study. 44 subjects were evaluated and categorized in four groups proposed by the GOLD 2011. The mean age was 69 ± 8.8 years, with mean FEV1 = 1.33 ± 0.53 liters (49 ± 15.7% of predicted). Medical Research Council Dyspnea (mMRC) and London Chest Activity Daily Living (LCADL) Scales and the Saint George's Respiratory Questionnaire (SRGQ) were applied. The six-minute walk test (6MWT) and the ADL simulation in appropriate laboratory were also conducted. There was no association between the COPD combined evaluation groups and the presence of peripheral oxygen desaturation and dyspnea (X² test), however it was noted a higher prevalence of subjects who desaturate in GOLD D group. Regarding to dyspnea in all groups exist subjects with dyspnea when performing ADL. There was no correlation between the presence of dyspnea with the presence of desaturation. Most symptomatic subjects, GOLD B and D, had higher ADL dyspnea (LCADL% total = 28% and 30%) compared with subjects GOLD A. The GOLD D subjects had a poorer quality of life (SGRQtotal = 49%) when compared to less symptomatic groups. The COPD combined classification wasn t sensitive in determining the presence of desaturation and dyspnea while performing ADLs. The subjects of the symptomatic groups and with increased risk of exacerbation had a poorer quality of life and greater dyspnea.