Serum triiodothyronine values. Prognostic indicators of acute mortality due to Pneumocystis carinii pneumonia associated with the acquired immunodeficiency syndrome

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Abstract
A feasibility study was undertaken prospectively to identify early clinical and laboratory factors predictive of acute hospital mortality in patients with the acquired immunodeficiency syndrome and concurrent carinii pneumonia. Twenty-six patients hospitalized with bronchoscopy-proved P. carinii pneumonia were studied. Nineteen patients survived their episode of P. carinii pneumonia, while 7 subjects did not. The only clinical factor associated with mortality was a history of a shorter duration of pulmonary symptoms. Univariate analysis showed decreased total CD8 cell count, total lymphocyte count, serum hemoglobin, serum albumin, total thyroxine, and total triiodothyronine values consistent with a poor outcome. Multivariate logistic regression analysis showed that the single best prognostic indicator of acute mortality appeared to be a total serum triiodothyronine value less than 0.70 nmol/L obtained early in the hospital course, and that the combination of serum triiodothyronine and hemoglobin values provided a better indication for survival. These preliminary observations would appear to justify the further exploration of serial serum triiodothyronine measurements as a potentially valuable prognostic indicator for the treatment of patients with acquired immunodeficiency syndrome infected with P. carinii and possibly other intercurrent infectious illnesses.