SESSION TITLE: Pulmonary Rehabilitation
SESSION TYPE: Original Investigation Slide
PRESENTED ON: Monday, October 26, 2015 at 07:30 AM - 08:30 AM
PURPOSE: To explore the relationships between dyspnoea and physical activity in people with chronic obstructive pulmonary disease (COPD). We hypothesised that the Dyspnoea-12 questionnaire (D-12), a comprehensive clinical measure of dyspnoea that assess the physical and affective components of breathlessness, would be significantly associated with reduced physical activity and explain more of physical activity levels compared to other dyspnoea measures.
METHODS: People with COPD were recruited as part of a multi-centre trial of exercise training for those with exercise-induced oxygen desaturation. Dyspnoea was assessed using the D-12, the Chronic Respiratory Questionnaire dyspnoea domain (CRQ-D) and the Borg dysponoea score (0 to 10) measured at the end of the six-minute walk test (6MWT) and endurance shuttle walk test (ESWT). Physical activity was measured objectively over one week using the Sense Wear Armband®. The relationships were analysed for three physical activity criteria given in minutes: sedentary time, < 1.5 METs (STmin); time spent in light PA, 1.5 to 3.0 METs (LPAmin); and time spent in moderate to vigorous PA, > 3.0 METs (MVPAmin). Correlation coefficients and linear regression were used.
RESULTS: Sixty-three participants with COPD were included (mean ± SD; age: 69 ± 7years, FEV1%pred: 49 ± 19). The D-12 was significantly associated with clinical dyspnoea measures (CRQ-D, Borg scores at the end of exercise tests, p ≤ 0.05). No significant association was found between the D-12 and any physical activity variable analysed (p > 0.05). The Borg score reported at the end of the ESWT was the only dyspnoea measure significantly associated with the physical activity variables STmin (r = 0.20, p = 0.05) and MVPAmin (r = -0.20, p = 0.04). No dyspnoea measure was able to predict physical activity.
CONCLUSIONS: The D-12 comprehensive dyspnea assessment was not associated with physical activity in COPD. The predictors of physical activity in COPD are likely to be complex and require further investigation.
CLINICAL IMPLICATIONS: Dyspnoea levels are not able to predict the level of physical activity performed by people with COPD.
DISCLOSURE: The following authors have nothing to disclose: Cristino Oliveira, Anne Holland, Regina Leung, Christine Mc Donald, Zoe McKeough, Sue Jenkins, Kylie Hill, Norman Morris, Lissa Spencer, Nola Cecins, Annemarie Lee, Catherine Hill, Helen Seale, Roger Adams, Helen Boursinos, Jennifer Alison
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