Background: Surgery, needle fasciotomy, and collagenase injection are used to treat Dupuytren contracture. The treatment decision requires balancing initial morbidity and costs of surgery against its potential long-term benefits over needle fasciotomy and collagenase. Objective: To compare the effectiveness of surgery, needle fasciotomy, and collagenase injection at 3 months and 2 years (secondary time points of the trial). Design: A multicenter, randomized, outcome assessor–blinded, superiority trial. (ClinicalTrials.gov: NCT03192020) Setting: 6 public hospitals in Finland. Participants: 302 persons with treatment-naive Dupuytren contracture (contracture angle <135°). Intervention: Surgery (n = 101), needle fasciotomy (n = 101), or collagenase (n = 100). Measurements: The primary outcome was the success rate, defined as greater than 50% contracture release and patients reaching the patient acceptable symptom state. Secondary outcomes included hand function, pain, quality of life, pati