| Characteristics | Group 1: IF positive | Group 2: IF negative |
| Subjects | 71 | 171 |
| Age yrs | 58.92 (17–83)±15.89 | 56.68 (15–82)±13.55 |
| Male/female | 45/26 (63.4) | 109/62 (63.7) |
| Immunocompromised | 71 (100) | 136 (79.5) |
| Autoimmune disease# | 18 (25.3) | 53 (31.0) |
| Rheumatoid arthritis | 4 | 17 |
| Giant cell arteritis | 6 | 0 |
| ANCA-positive vasculitis | 4 | 2 |
| Systemic sclerosis | 0 | 9 |
| Granulomatosis with polyangiitis | 0 | 6 |
| Other | 6 | 20 |
| Solid organ transplantation# | 28 (39.4) | 37 (21.6) |
| Liver | 1 | 6 |
| Heart | 10 | 15 |
| Kidney | 16 | 14 |
| Lung | 0 | 5 |
| >1 organ | 1 | 1 |
| Active haemato-oncological disease# | 23 (32.4) | 41 (24.0) |
| Solid tumour | 3 | 6 |
| Acute myeloid leukaemia | 1 | 9 |
| Acute lymphoblastic leukaemia | 1 | 2 |
| Chronic lymphatic leukaemia | 3 | 4 |
| Hodgkin’s lymphoma | 3 | 2 |
| Non-Hodgkin’s lymphoma | 12 | 14 |
| Multiple myeloma | 2 | 9 |
| Other haematological disease | 0 | 9 |
| Other cause of immunosuppression# | 2 (2.8) | 5 (2.9) |
| Death | 18 (25.4) | 16 (9.34) |
| Pneumocystis diagnosis | ||
| Definitive PCP (positive IF testing) | 71 (100) | 0 (0) |
| PCR Pneumocystis jirovecii results | ||
| Positive qualitative PCR | 71 (100) | 18 (10.5) |
| Quantitative PCR (log10) in case of positivity median (range) | 3.8 (1.94–6.17) | 2.18 (1.15–4.72) |
Data are presented as n, median (range)±sd, n (%), unless otherwise stated. IF: immunofluorescence; ANCA: antineutrophil cytoplasmic antibody; PCP: Pneumocystitis pneumonia. #: the most relevant immunosuppression is chosen. For the specified diagnoses, more than one diagnosis per patient is possible.