Fig. 1

Kaplan-Meier plots comparing commonly identified small intestinal lesions (a) and the study cohorts (b). Kaplan-Meier plots of cumulative probability of survival and the log-rank test were used to compare survival between the five most frequent surgical diagnosis categories and between horses that belong to each of the admission periods (2004–2006 and 2012–2014 admission years). Vertical lines on the curves represent censoring times. The log-rank test p values and number of horses in each category are shown. EFE = epiploic foramen entrapment, IFEE = idiopathic focal eosinophilic enteritis, PLO = pedunculated lipoma obstruction