Brazilian Journal of Pulmonology

ISSN (on-line): 1806-3756 | ISSN (printed): 1806-3713

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Influence of lean body mass on cardiopulmonary repercussions during the six-minute walk test in patients with COPD

Influência da massa magra corporal nas repercussões cardiopulmonares durante o teste de caminhada de seis minutos em pacientes com DPOC

Nilva Regina Gelamo Pelegrino, Paulo Adolfo Lucheta, Fernanda Figueirôa Sanchez, Márcia Maria Faganello, Renata Ferrari, Irma de Godoy

J Bras Pneumol.2009;35(1):20-26

Abstract PDF PT PDF EN Portuguese Text

Objective: Although lean body mass (LBM) has been associated with mortality in patients with COPD, its influence on functional limitation is not clear. The objective of this study was to analyze the cardiopulmonary variables in COPD patients with or without LBM depletion, prior to and after the six-minute walk test (6MWT). Methods: We evaluated COPD patients, 32 with LBM depletion and 36 without. All patients underwent clinical evaluation, spirometry, evaluation of body mass composition and 6MWT, as well as completing questionnaires related to quality of life and perception of dyspnea. Results: No significant differences in the severity of airway obstruction, perception of dyspnea and quality of life scores were found between the groups. The distance covered on the 6MWT was similar in COPD patients with and without LBM depletion (470.3 ± 68.5 m vs. 448.2 ± 89.2 m). However, patients with LBM depletion presented significantly greater differences between baseline and final values in terms of heart rate and Borg scale index for lower limb fatigue. There was a significant positive correlation between distance covered on the 6MWT and FEV1 (r = 0.381, p = 0.01).Conclusions: In the patients studied, functional exercise tolerance and quality of life were unaffected by LBM depletion. However, the patients with LBM depletion presented more pronounced lower limb fatigue during the 6MWT, which underscores the importance of the evaluation and treatment of systemic manifestations in COPD patients.

 


Keywords: Body mass index; Pulmonary disease, chronic obstructive; Exercise tolerance.

 


Gender differences in predictors of health status in patients with COPD

Preditores do estado de saúde em pacientes com DPOC de acordo com o gênero

Renata Ferrari, Suzana Erico Tanni, Paulo Adolfo Lucheta, Márcia Maria Faganello, Renata Antonialli Ferreira do Amaral, Irma Godoy

J Bras Pneumol.2010;36(1):37-43

Abstract PDF PT PDF EN Portuguese Text

Objective: To evaluate the health status (HS) of COPD patients and to identify the main predictors of HS in these patients according to gender. Methods: The study included 90 COPD patients (60 males and 30 females; mean age = 64 ± 9 years) with a wide range of airway obstruction disorders (mean FEV1 = 56 ± 19% of predicted). The men were individually matched to the women by % of predicted FEV1 (ratio: 2:1). The patients were assessed regarding body composition; six-minute walk distance; perception of dyspnea using the Modified Medical Research Council Dyspnea Scale; Saint George's Respiratory Questionnaire (SGRQ); Charlson comorbidity index; and the multidimensional Body mass index, airway Obstruction, Dyspnea, and Exercise capacity (BODE) index. Multiple linear regression analysis was performed to identify the predictors of HS by gender. Results: Impairment of HS was greater among the women than among the men for SGRQ total score and for all SGRQ domains (total: 51 ± 18% vs. 38 ± 19%; p = 0.002; symptoms: 61 ± 22% vs. 42 ± 21%; p < 0.001; activity: 62 ± 18% vs. 49 ± 21%; p = 0.004; and impact: 41 ± 19% vs. 27 ± 18%; p = 0.001). The multiple linear regression showed that age and perception of dyspnea correlated with SGRQ total score for both genders (males, r² = 0.42; females, r² = 0.70; p < 0.05). Conclusions: Our results showed an association between gender and HS in COPD patients. Age and dyspnea are determinants of HS in both genders.

 


Keywords: Pulmonary disease, chronic obstructive; Health status; Dyspnea.

 


 

 


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