What this phase means
Phase 2: researchers already know a roughly safe dose (from phase 1). This stage asks whether the treatment actually helps the condition, and watches side effects more closely.
Phase labels are FDA/ICH categories applied to the registry Phase field. They are not a finding that this study succeeded.
What the registry says happens
If you join, the listed intervention(s) are DDY391, or Placebo. The registry lists allocation as randomized. The purpose of this Phase 2a/b study is: 1.
They plan to enroll about 220 people at 8 sites. Taking part typically means taking a study drug (or dummy pill) plus check-ins.
Official title (unrewritten)
A Randomized, Double-blind, Placebo-controlled, Multicenter Phase 2a/b Study Assessing the Efficacy, Safety and Tolerability of DDY391 in Participants With Active Moderate to Severe Psoriatic Arthritis
Interventions: DDY391, Placebo
Primary outcome (registry wording): Part A: Number of participants achieving American College of Rheumatology 50 (ACR50) response