CD8A and pneumocystosis: Factors with P < 0.1 were included in cox regression model for multivariate analysis, and the results showed that a CD8+ T cell count <115/μl (HR=4.418, 95%CI 1.867-10.457, P=0.001) and the time from visit to initiation of sulfonamides therapy ≥2 days (HR=5.304, 95%CI 1.139-24.687, P=0.033) were independent risk factors for 90-day all-cause death in non-HIV-PCP patients with RF, as shown in Figure 6.