Abstract
ObjectivesA mortality rate of non-human immunodeficiency virus–infected pneumocystis pneumonia (non-HIV PCP) is 30–60%. But the effectiveness of adjunctive corticosteroids with trimethoprim–sulfamethoxazole has been unclear, and we examined whether it lowered risk of mortality in non-HIV PCP. MethodsWe did an observational study of adult non-HIV PCP patients from April 2010 through March 2016, using Japanese nationwide healthcare records of the Diagnostic Procedure Combination database (DPC). The risk was estimated by the time-dependent Cox regression analyses with inverse probability weights. Result1299 eligible non-HIV PCP patients were identified. 737 patients were severe respiratory status (partial pressure of oxygen in arterial blood [PaO2] ≤60mm Hg) and 562 were moderate (PaO2 >60mm Hg) at hospital admission. Among patients with severe respiratory status, the adjunctive corticosteroids was associated with lower risk of 60-day mortality (HR 0.71; 95% confidence interval [CI], 0.55–0.91), and significantly decreased mortality rates (24.7% vs 36.6%, P=0.006). In contrast, no significant differences were observed in the risk of 60-day mortality (HR 1.17; 95% CI, 0.73–1.86) and the mortality rate (10.9% vs 9.1%, P=0.516) among patients with moderate respiratory status. ConclusionThe adjunctive corticosteroids were associated with lower risk of 60-day mortality in severe non-HIV PCP patients.
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