Colic Survival Scoring System in Horses

Colic, defined as any acute abdominal pain, is an important sign of gastrointestinal disease in horses. Because colic may stem from many causes, predicting survival is challenging, if not impossible, at times. Could a scoring system reliably predict colic survival based on certain clinical evidence? A group of researchers thought so, and here’s how they went about it.^*

The researchers took a two-pronged approach to the question. First, they designed a retrospective study to determine the clinical parameters described in horses that survived colic and used them to formulate a survival scoring system. Second, a prospective study used horses presented for colic at two different veterinary clinics to determine the validity of the scoring system.

In the retrospective study, 658 horses with colic signs were identified. At the end of their review, the researchers settled on six health variables to use in the scoring system based on their strong predictive value for outcome at discharge: heart rate, respiratory rate, total calcium, blood lactate, abnormal abdominal ultrasound, and abnormal rectal examination. A total assessment score of 0 to 12 was possible, with a range of 0 to 2 points for each of the six variables.

As for the prospective study, data from 95 horses with colic were collected to assess the validity of the colic scoring system. Those that received a score equal to or less than 7 were predicted to survive, while those that received a score greater than 7 were predicted to die.

Researchers concluded that the scoring system “developed in this study is applicable for clinicians in a hospital setting with a clinical caseload of horses with colic signs using data available in most equine practices.”

Sound feeding management is one way to keep colic at bay, according to Catherine Whitehouse, M.S., a nutritionist at Kentucky Equine Research.

“Many of the nutritional strategies that horse owners follow daily, sometimes subconsciously, evolved with gastrointestinal health in mind: near constant availability of forage, whether it’s pasture or hay; small concentrate meals; access to potable water; and the provision of clean, or hygienic, feedstuffs,” she said. Everyday awareness of these and other management practices fosters gastrointestinal health.

“More recently, we have begun to understand the importance of balancing all-forage diets with vitamins and minerals, and augmenting diets with nutritional supplements that target specific problems,” she explained. “Kentucky Equine Research has developed ways to support gastrointestinal health on many fronts, such as protecting the stomach from ulceration and maintaining a healthy hindgut microbiome.”

^*Farrell, A., K. Kersh, R. Liepman, and K.A. Dembek. 2021. Development of a colic scoring system to predict outcome in horses. Frontiers in Veterinary Science:697589.