Abstract
AimTo provide a Portuguese version of the Multidimensional Dyspnea Profile (MDP), investigating its validity and reliability in Brazilian patients with COPD.MethodsThis was a cross-sectional study for translation and linguist validation of the Portuguese MDP version for patients with COPD. The process occurred according to the protocol of Mapi Research Trust, Lyon, France. Three scores of MDP were used for the analysis: the immediate unpleasantness of dyspnea (A1); the “immediate perception domain” (S) (sum of A1 plus the sensory descriptors) and the “emotional response domain” (A2) (sum of the emotional descriptors). The questionnaires COPD assessment Test (CAT), Hospital Anxiety and Depression scale (HADS) and Medical Research Council scale (MRC) were used as anchors to investigate MDP’s validity. Internal consistency was assessed with Cronbach’s alpha. Test–retest reliability was assessed with intraclass correlation coefficient (ICC) and concurrent validity was assessed with Spearman correlation coefficients.ResultsThirty patients with moderate-severe COPD were studied for MDP’s validation analysis (43% male, 63±8years, body mass index [BMI] 27±6Kg/m2, forced expiratory volume in the first second [FEV1] 48±15%predicted, six-minute walking test [6MWT] 464±84m and 84±16%predicted), whereas 10 patients were excluded from the test-retest reliability analysis due to missing data, resulting in a sample of 20 subjects for this purpose (50% male, 62±8years, BMI 27±6Kg/m2, FEV1 48±15%predicted, 6MWT 452±93m and 82±19%predicted). Both samples were similar regarding general characteristics (P>0,05 for all variables). MDP presented strong correlations, i.e., ICC intra-rater: A1: 0.77 (0.48–0.90), S: 0.78 (0.52–0.91), and A2: 0.85 (0.66–0.94), with high internal consistency (Cronbach's α 0.86, 0.88 and 0.92 respectively); and ICC inter-rater: A1: 0.74 (0.46–0.89), S: 0.75 (0.48–0.89) and A2: 0.91 (0.78–0.96) with Cronbach's α 0.85, 0.86 and 0.95 respectively.ConclusionThe Portuguese version of the MDP is the first valid and reliable instrument to assess dyspnea multidimensionally in Portuguese-speaking patients with COPD.
Highlights
Thirty patients with moderate-severe chronic obstructive pulmonary disease (COPD) were studied for multidimensional dyspnea profile (MDP)’s validation analysis (43% male, 63±8years, body mass index [BMI] 27±6Kg/m2, forced expiratory volume in the first second [FEV1] 48±15%predicted, six-minute walking test [6MWT] 464±84m and 84 ±16%predicted), whereas 10 patients were excluded from the test-retest reliability analysis due to missing data, resulting in a sample of 20 subjects for this purpose (50% male, 62 ±8years, BMI 27±6Kg/m2, FEV1 48±15%predicted, 6MWT 452±93m and 82±19%predicted)
Dyspnea is a major disabling symptom reported by patients with chronic obstructive pulmonary disease (COPD), described as a subjective experience, derived from interactions among multiple physiological, psychosocial, and environmental factors [1]
The multidimensional dyspnea profile (MDP) is an instrument indicated for this purpose [4,5,6,7]
Summary
Dyspnea is a major disabling symptom reported by patients with chronic obstructive pulmonary disease (COPD), described as a subjective experience, derived from interactions among multiple physiological, psychosocial, and environmental factors [1]. The majority of available instruments in Portuguese assesses dyspnea only in a one-dimensional approach [2,3]. An instrument in Portuguese language which is able to assess and distinguish multiple aspects of dyspnea is necessary. The multidimensional dyspnea profile (MDP) is an instrument indicated for this purpose [4,5,6,7]. It assesses immediate respiratory discomfort, qualities of the breathlessness, and emotional responses [4,6]. The aim of this study was to provide a Portuguese version of MDP, investigating its validity and reliability in Brazilian patients with COPD
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