The aim is to describe the development of hand function in young adults with unilateral cerebral palsy (CP), who participated in a 2-week Constraint Induced Movement Therapy (CIMT) camp 6 years earlier. Eleven participants, 16-21 years at follow-up, were assessed at three occasions during 2005 and once in 2011. At the 6-year follow-up, performance on the Assisting Hand Assessment and the Jebsen-Taylor Hand Function test remained unchanged (P greater than 0.05) from the first assessment before the camp. Grip strength (Grippit[R]) increased in both the involved (+80.9%) and non-involved hand (+94.4%) (P less than 0.05), while performance on the Melbourne Assessment tended to decrease (-7%). In conclusion, it seems that young adults with unilateral CP maintain their hand function performance at the same level as in the early adolescent period. Interestingly, the grip strength increased over time also for the involved hand. (Contains 1 table.)