TABLE 4.

Clinical prediction rules derived from the respiratory rate and oxygen saturation multivariable logistic regression models for the diagnosis of Pneumocystis jirovecii pneumonia among 500 seriously ill HIV-infected participants presenting with a cough of any duration and one or more World Health Organization danger signs.

Variable	Points
Respiratory rate model
Chest X-ray possible/likely PJP	2
Haemoglobin ≥ 9 g/dL	1
Respiratory rate 30–39	1
40–49	2
≥ 50	3
Oxygen saturation model
Chest X-ray possible/likely PJP	3
Haemoglobin ≥ 9 g/dL	1
Saturation < 94%	2

PJP, Pneumocystis jirovecii pneumonia.