TABLE 3.

RAPID score risk stratification

Parameter	Measure	Score
Renal: urea, mmol·L−1	<5 5–8 >8	0 1 2
Age, years	<50 50–70 >70	0 1 2
Purulence of fluid	Purulent Non-purulent	0 1
Infection source	Community-acquired Hospital-acquired	0 1
Dietary factors: albumin, mmol·L−1	>27 <27	0 1
Risk categories	Score 0–2 Score 3–4 Score 5–7	Low risk Moderate risk High risk

Using baseline clinical parameters in patients with pleural infection, each patient scores from 0 to 7. Reproduced and modified from [25] with permission.