Exacerbations in patients with chronic obstructive pulmonary disease receiving physical therapy: a cohort-nested randomised controlled trial

BACKGROUND

Physical exercise training aims at reducing disease-specific impairments and improving quality of life in patients with chronic obstructive pulmonary disease (COPD). COPD exacerbations in particular negatively impact COPD progression. Physical therapy intervention seems indicated to influence exacerbations and their consequences. However, information on the effect of physical therapy on exacerbation occurrence is scarce. This study aims to investigate the potential of a protocol-directed physical therapy programme as a means to prevent or postpone exacerbations, to shorten the duration or to decrease the severity of exacerbations in patients with COPD who have recently experienced an exacerbation. Besides, this study focuses on the effect of protocol-directed physical therapy on health status and quality of life and on cost-effectiveness and cost-utility in patients with COPD who have recently experienced an exacerbation.

METHODS/DESIGN

A prospective cohort of 300 COPD patients in all GOLD stages will be constructed. Patients will receive usual multidisciplinary COPD care including guideline-directed physical therapy. Patients in this cohort who have GOLD stage 2 to 4 (post-bronchodilator FEV1/FVC < 0.7 and FEV1 < 80% of predicted), who receive reimbursement by health insurance companies for physical therapy (post-bronchodilator Tiffeneau-index < 0.6) and who experience a COPD exacerbation will be asked within 56 days to participate in a cohort-nested prospective randomised controlled trial (RCT). In this RCT, the intervention group will receive a strict physical therapy programme for patients with COPD. This protocol-directed physical therapy (pdPT) will be compared to a control group that will receive sham-treatment, meaning no or very low-intensity exercise training (ST). An economic evaluation will be embedded in the RCT. Anthropometric measurements, comorbidities, smoking, functional exercise capacity, peripheral muscle strength, physical activity level, health related quality of life, patients' perceived benefit, physical therapy compliance, motivation level, level of effective mucus clearance, exacerbation symptoms and health care contacts due to COPD will be recorded. Follow-up measurements are scheduled at 3 and 6 weeks, 3, 6, 12 and 24 months after inclusion.

DISCUSSION

Ways to minimise potential problems regarding the execution of this study will be discussed.

TRIAL REGISTRATION

The Netherlands National Trial Register NTR1972.

The cost of COPD exacerbations: a university hospital--based study in Greece

BACKGROUND

Hospitalization attributed to severe exacerbations is the major cost driver of Chronic Obstructive Pulmonary Disease (COPD). Given that in Greece no previous studies have addressed the economic burden of COPD, the aim of the study was to examine the hospitalization cost of COPD patients with severe exacerbations in the region of Thrace.

METHODS

Sample consisted of 142 COPD patients with severe exacerbations who were admitted to the pneumonology department of the University Teaching Hospital of Alexandroupolis (UTHA) in 2006 and 2007. Data collection was performed retrospectively and resource utilization was derived from patients' files. General Linear Model univariate analysis was applied in order to test the influence of disease severity on costs.

RESULTS

Mean actual cost per severe exacerbation was €1711; the amount of €621 is reimbursed by social security funds. Price discrepancies are observed between the actual and the nominal cost per patient in all disease stage categories. Mean hospitalization cost per COPD patient increases slightly with the severity of the disease. However, in the very severe stage it greatly increases mainly due to Intensive Care Unit (ICU) admission. In multivariate analysis the length of stay and the stage of the disease were both related to significantly increased costs, while the existence of co-morbidities exhibited marginal significant relation to increased cost.

CONCLUSIONS

The cost estimation of severe exacerbations is important as it could trigger further research and also provide the opportunity of creating national epidemiological and economic data. Such data could contribute to the estimation of the total economic and societal burden of COPD in the country.