Clinical features

• age ^a 
  
  
• duration of illness ^c 
• any recent diarrhoea ^c 
• pleuritic chest pain ^b  
• chills ^b 
  
  
• a history of
  • asthma ^a 
  • dementia ^a 
  • any immunosuppression ^a 
• any underlying lung disease ^c 
• co-existing disease ^a 
  • neoplastic disease
  • liver disease
  • congestive heart failure
  • cerebrovascular disease
  • renal disease
    
    
• smoking ^a
• any pets ^d

• altered mental state ^a 
• obesity ^a
  
  
• bloody sputum ^c 
• a cough ^a  
• fever ^a  
• respiratory rate > 30 per minute ^a  
• tachycardia ^a  
  
  
• asymmetric respiration ^a
• dullness to percussion ^a
• decreased breath sounds ^a
• bronchial breathing ^a
• crackles ^a  
• aegophony ^a 

• absence of asthma
• temperature > 37.8°C
• pulse >100 beats/min
• crackles
• decreased breath sounds

A high score makes pneumonia more likely