Editing Croup (section)

===Severity===
{| class="wikitable" style="float: right; margin-left; text-align:center"
|+ '''Westley score: Classification of croup severity'''<ref name=Croup09/><ref name=Peds99/> 
|-
! rowspan="2" |Feature
! colspan="6" |Number of points assigned for this feature
|-
!0
!1
!2
!3
!4
!5
|-
| Chest wall<br /> retraction
| style="width:50px;"|None
| style="width:50px;"|Mild
| style="width:50px;"|Moderate
| style="width:50px;"|Severe
| style="width:50px;"|
| style="width:50px;"|
|-
| [[Stridor]]
| None
| With<br /> agitation
| At rest
| 
| 
| 
|-
| [[Cyanosis]]
| None
|  
|  
|  
| With<br /> agitation
| At rest
|-
| [[Level of consciousness|Level of<br />consciousness]]
| Normal
| 
| 
| 
| 
| Disoriented
|-
| Air entry
| Normal
| Decreased
| Markedly decreased
| 
| 
| 
|}
The most commonly used system for classifying the severity of croup is the Westley score. It is primarily used for research purposes rather than in clinical practice.<ref name=Cherry08/> It is the sum of points assigned for five factors: level of consciousness, cyanosis, stridor, air entry, and retractions.<ref name=Cherry08/> The points given for each factor is listed in the adjacent table, and the final score ranges from 0 to 17.<ref name=Peds99/>
* A total score of ≤ 2 indicates ''mild'' croup. The characteristic barking cough and hoarseness may be present, but there is no stridor at rest.<ref name=Croup09/>
* A total score of 3–5 is classified as ''moderate'' croup.  It presents with easily heard stridor, but with few other signs.<ref name=Croup09/>
* A total score of 6–11 is ''severe'' croup.  It also presents with obvious stridor, but also features marked [[chest wall]] indrawing.<ref name=Croup09/>
* A total score of ≥ 12 indicates impending [[respiratory failure]].  The barking cough and stridor may no longer be prominent at this stage.<ref name=Croup09/>

85% of children presenting to the emergency department have mild disease; severe croup is rare (<1%).<ref name=Croup09/>