Cumulative incidence of systemic lupus erythematosus in patients newly diagnosed with primary immune thrombocytopenia and autoimmune haemolytic anaemia from 2005 to 2008 in Taiwan
| Patients | Primary ITP | Primary AIHA | ||||||
| 1-year risk | 5-year risk | 1-year risk | 5-year risk | |||||
| SLE/N | % | SLE/N | % | SLE/N | % | SLE/N | % | |
| All | 73/1352 | 5.4 | 131/1208 | 10.8 | 33/265 | 12.5 | 45/214 | 21.0 |
| Women | 64/861 | 7.4 | 114/774 | 14.7 | 32/162 | 19.8 | 43/135 | 31.9 |
| Men | 9/491 | 1.8 | 17/434 | 3.9 | 1/103 | 1.0 | 2/79 | 2.5 |
| <18 years | 28/457 | 6.1 | 50/448 | 11.2 | 5/24 | 20.8 | 8/24 | 33.3 |
| Women | 21/215 | 9.8 | 38/209 | 18.2 | 5/18 | 27.8 | 8/18 | 44.4 |
| Men | 7/242 | 2.9 | 12/239 | 5.0 | 0/6 | 0.0 | 0/6 | 0.0 |
| All adults (≥18 years) | 45/895 | 5.0 | 81/760 | 10.7 | 28/241 | 11.6 | 37/190 | 19.5 |
| Women | 43/646 | 6.7 | 76/565 | 13.5 | 27/144 | 18.8 | 35/117 | 29.9 |
| Men | 2/249 | 0.8 | 5/195 | 2.6 | 1/97 | 1.0 | 2/73 | 2.7 |
| 18–45 years | 29/362 | 8.0 | 57/335 | 17.0 | 18/93 | 19.4 | 22/85 | 25.9 |
| Women | 28/285 | 9.8 | 53/267 | 19.9 | 17/67 | 25.4 | 21/62 | 33.9 |
| Men | 1/77 | 1.3 | 4/68 | 5.9 | 1/26 | 3.9 | 1/23 | 4.4 |
| 45–65 years | 10/279 | 3.6 | 17/244 | 7.0 | 8/71 | 11.3 | 11/62 | 17.7 |
| Women | 10/214 | 4.7 | 17/190 | 9.0 | 8/44 | 18.2 | 10/39 | 25.6 |
| Men | 0/65 | 0.0 | 0/54 | 0.0 | 0/27 | 0.0 | 1/23 | 4.4 |
| ≥65 years | 6/254 | 2.4 | 7/181 | 3.9 | 2/77 | 2.6 | 4/43 | 9.3 |
| Women | 5/147 | 3.4 | 6/108 | 5.6 | 2/33 | 6.1 | 4/16 | 25.0 |
| Men | 1/107 | 0.9 | 1/73 | 1.4 | 0/44 | 0.0 | 0/27 | 0.0 |
AIHA, autoimmune haemolytic anaemia; ITP, immune thrombocytopenia; SLE, systemic lupus erythematosus.