Table 1.
Patient characteristics
| Sex, n (%) | |
| Female | 541 (52.9) |
| Male | 481 (47.1) |
| Age, n (%) | |
| 0–6 | 0 (0) |
| 7–17 | 4 (0.4) |
| 18–30 | 104 (10.,2) |
| 31–50 | 174 (17.0) |
| 51–60 | 171 (16.7) |
| > 60 | 570 (55.7) |
| ITP classification, n (%) | |
| Primary | 735 (72.1) |
| Secondary | 150 (14.7) |
| Not classified | 134 (13.2) |
| ITP stage, n (%) | |
| Newly diagnosed | 48 (5.1) |
| Persistent | 154 (16.2) |
| Chronic | 748 (78.7) |
| Disease manifestation at diagnosis, na (%) | |
| Gastrointestinal bleeding | 19 (1.5) |
| Vaginal bleeding | 37 (3.0) |
| Nosebleed | 65 (5.2) |
| Other bleedings | 80 (6.4) |
| Petechiae | 172 (13.7) |
| Hematomas | 242 (19.3) |
| Incidental finding | 514 (41.1) |
| Unknown | 123 (9.8) |
| Platelet count (in × 109/l) at time of diagnosis, n (%) | |
| 0–10 | 123 (12.0) |
| 11–30 | 192 (18.8) |
| 31–50 | 211 (20.7) |
| 51–100 | 495 (48.5) |
| Bone marrow biopsy | |
| Yes | 511 (50.0) |
| No | 492 (48.2) |
| Unknown | 18 (1.8) |
aMultiple answers allowed (in this case, n equals the number of answers given and not number of patients)