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Respiratory rate multivariable logistic regression model to establish a clinical prediction rule for the diagnosis of Pneumocystis jirovecii pneumonia (PJP) among 500 seriously ill HIV-infected participants presenting with a cough of any duration and one or more World Health Organization danger signs. (a) Calibration plot for the assessment of variables included in the respiratory rate model. (b) Receiver operating characteristics (ROC) of the respiratory model.
