Chronic Obstructive Pulmonary Disease Clinical Trial
Official title:
The Effect of Low-dose Corticosteroids and Theophylline on the Risk of Acute Exacerbations of COPD: the TASCS Randomised Clinical Trial
The aim of this multi-centre, double blind, randomised, controlled trial (DBRCT) is to assess the effect of low dose theophylline, singly and in combination with low dose oral prednisone, on COPD (Chronic Obstructive Pulmonary Disease) exacerbations, quality of life and secondary clinical outcomes compared with usual therapy and placebo over 48 weeks of treatment. 1670 symptomatic patients with COPD will be recruited in China for comparison of low dose theophylline versus placebo and low dose theophylline + low dose prednisone The primary end-point for this study is the annualised COPD exacerbation rate between the treatment groups. Secondary outcomes included time to first severe exacerbation requiring hospitalisation or death, health status, and pre- and post-bronchodilator spirometry.
The investigators hypothesise that patients with COPD will have beneficial responses to low dose theophylline and prednisone, superior to placebo and low dose theophylline alone, reflected by a range of clinical outcomes. The study aims to demonstrate that treatment with low dose oral prednisone and low dose, slow release theophylline compared to low dose, slow release theophylline only or placebo will reduce COPD exacerbations and improve a range of secondary outcomes including quality of life, COPD Assessment Test (CAT) score, hospital admissions and lung function. Eligible participants will be randomised to one of three treatment arms in a DBRCT and will receive placebo OR low-dose theophylline (100 mg twice a day) OR low-dose theophylline 100 mg twice a day (BD) plus low-dose prednisone (5 mg once a day) Patients will be eligible for inclusion if all the following criteria are met: - Current or former smokers (>10 pack years) or biomass exposure - 40 - 80 years of age - Clinical diagnosis of COPD - Post-bronchodilator forced expiratory volume at one second (FEV1) <70% predicted - Post bronchodilator FEV1/forced vital capacity (FVC) ratio<0.7 ;
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