A Long‐term Follow‐up Investigation of Patients With Hypertrophic Pyloric Stenosis—with Special Reference to the Physical and Mental Development

Summary 202 of 203 patients medically treated for hyper‐trophic pyloric stenosis at the Children's Hospital in Gothenburg 1922 to 1942 were classified according to the severity of their inanition during their disease. In the 180 registered for military service, height and the intelligence test results were investigated, and 176 of these were recently interviewed. A significant correlation was found between the adult height and the weight loss and duration of the inanition in infancy at a constant birth weight. A numerical but not statistically significant difference could be demonstrated in the intelligence and adaptability tests between the patients with more severe under‐nutrition and those of the same age at the time they entered military service. Another finding was that undernutrition in infancy seemed to be associated with a decreased fertility in men, especially in the siring of girls.