A total of 105 infants with nonsynostotic posterior plagiocephaly were trea
ted using a helmet or by head positioning. Effect of treatment was scored u
sing a cosmetic outcome score (0-10 points) assigned by the parents. The on
set of the observed skull deformity correction was not different for the he
lmet vs. nonhelmet treatment. Improvement was significantly better and fast
er in the helmet group compared with nonhelmet treatment (p < 0.01 and p <
0.001, respectively).