Development of a respiratory severity score for hospitalized adults in a high HIV-prevalence setting—South Africa, 2010–2011

Table 4 Predicted and observed risk of mortality based on risk classification using the ACHU (Age, confusion, HIV, urea) respiratory severity score among hospitalized adults with lower respiratory tract infections, South Africa, 2010–2011

ACHU Risk Classification^a	Score	N	Predicted Mortality (%)	Observed Mortality (%) (95% Confidence Interval)	C-statistic
Low	≤1	570	2.4	2.1 (0.1–3.7)	0.769
Low-intermediate	2	110	6.4	6.4 (2.6–12.7)
High-intermediate	3	230	11.9	14.4 (10.1–19.6)
High	≥4	101	29.3	25.7 (17.6–35.4)

^aACHU respiratory severity score risk classification categories are based on the number of points an individual patient has based on the presence or absence of risk factors associated with in-hospital mortality from our population. The ACHU scores range from 0 to 6

ISSN: 1471-2466