Complications of video-assisted gastrostomy in children with or without a ventriculoperitoneal shunt
The aim of the study was to test the hypothesis that the presence of a ventriculoperitoneal shunt ( VPS) influences the frequency of postoperative complications after video-assisted gastrostomy ( VAG) in children. When using a power of 80%, a critical value for significance of 5% and an assumed population-based standard deviation of 0.4, it will be required to have a sample size of at least 14 chi