Table-1.

The NPS for measuring colic in horses.

Pain severity	Clinical signs	Score
Mild	No overt pain behaviors	0
↓↓	Looking at the belly or flank Flehman or lip curling	1
↓↓	Sternal recumbency stretching Restlessness	2
↓↓	Kicking at the belly Pawing	3
↓↓	Attempting to lie down or crouching Lateral recumbency	4
Severe	Rolling	5

Based on the score of the demonstrated clinical signs, a pain score was assigned. If more than one clinical sign was demonstrated, the score was based on the clinical signs with the highest value, NPS=Numerical pain scale