In total 249 horses surgically treated for colic in Sweden during 2002 until 2005 were studied. The horses was identified by the animal insurance company Agria. Survival was studied with respect to age, gender, breed, diagnosis (small intestinal problems, caecal problems, large intestinal problems, incarceration in nephrosplenic ligament, unspecific colic and other colic problems) and treating hospital. Different survivals were calculated. For short-term survival proportions was used and for long-term it was done using Kaplan-Meier technique and log-rank testing.