Active Drug Comparative, Multi-center, phase3 Clinical Study to Evaluate the Efficacy and Safety of PG201 in Osteoarthritis Patients

The objective of this study was to to evaluate the efficacy and safety of PG201 in osteoarthritis patients. This clinical study was designated to be non-inferiority test with level of significance: 95%, α=0.05. Type 2 error (β) was set as 0.2, and the power of the test was set as 80%. Assuming 20% drop-out rate, the number of subjects required for each treatment group was estimated to be 154, while the total number of subjects required for the study 308. non-inferiority margin: 8mm