One hundred and two patients with post-traumatic frozen shoulder were randomized to arthroscopic adhesiolysis (n=51) or to physical therapy plus joint manipulation (n=51). The primary outcome of interest was overall treatment efficacy at 3 months. Secondary outcomes included pain intensity (VAS, PPI, PRI), Constant-Murley subdomains (ADL, ROM, MMT), detailed shoulder ROM (flexion, abduction, external and internal rotation), adverse events, and exploratory risk factors for response using multivariable logistic regression. Outcomes were assessed at baseline and 3 months. Overall, the results of the study revealed higher total effectiveness with adhesiolysis (96.1% vs 82.4%) and greater improvements in pain, function, and ROM at 3 months. The authors conclude that arthroscopic adhesiolysis benefits elderly patients with post-traumatic frozen shoulder, while older age and fat infiltration may attenuate efficacy.