In the adjusted logistic regression analysis, the following variables were associated with increased 30-day mortality after a first hospitalization for pneumonia (Table 4): CCI score ≥2 (ORadj = 4.07, 95% CI: 2.03–8.17), male sex (ORadj = 3.86, 95% CI: 1.05–14.2), no current HAART (ORadj = 3.19, 95% CI: 1.42–7.16), history of AIDS (ORadj = 2.78, 95% CI: 1.34–5.78), latest CD4+ cell count ≤200 cells/μl (ORadj = 2.72, 95% CI: 1.28–5.78) and age (ORadj = 1.53 per 10 year increase, 95% CI: 1.11–2.12). Here, CD4 is linked to AIDS.