Clinical feature	Score
Level of consciousness	Normal, including sleep = 0 Disoriented = 5
Cyanosis	None = 0 With agitation = 4 At rest = 5
Stridor	None = 0 With agitation = 1 At rest = 2
Air entry	Normal = 0 Decreased = 1 Markedly decreased = 2
Retractions	None = 0 Mild = 1 Moderate = 2 Severe = 3

A total score of 2 or less indicates mild croup, between 3 and 7 indicates moderate croup, between 8 and 11 indicates severe croup, and 12 or higher indicates impending respiratory failure (Ref. [2])