CD8A and pneumocystosis: Factors with P <0.1 were incorporated into the logistic model for multivariate analysis, and the results showed that CD8+ T cell count <115/μl (OR=15.803, 95%CI 1.988-125.611, P=0.009), BALF-neutrophils percentage ≥50%(OR=7.678, 95%CI 1.025-57.502, P=0.047), withdrawal of corticosteroids to the onset of symptoms ≤5 days (OR=14.831, 95%CI 1.827-120.381, P=0.012), and the time from presentation to initiation of sulfonamides ≥2 days (OR=16.313, 95%CI 1.890-140.813, P=0.011) was an independent risk factor for in-hospital death in PCP patients with RF, as shown in Figure 5.