Table 1.
Characteristics of patients with myeloproliferative neoplasms and matched controls
| MPN patients N (%) | Controls N (%) | |
|---|---|---|
| Sex | ||
| Men | 4,297 (46) | 16,080 (45) |
| Women | 5,132 (54) | 19,740 (55) |
| Age at diagnosis | ||
| 19–49 | 920 (10) | 3,680 (10) |
| 50–59 | 1,193 (13) | 4,772 (13) |
| 60–69 | 1,965 (21) | 7,859 (22) |
| 70–79 | 3,100 (33) | 12,261 (34) |
| ≥80 | 2,251 (24) | 7,248 (20) |
| Median age | 72 | 71 |
| Calendar period of diagnosis | ||
| 1987–1992 | 1,655 (18) | 6,366 (18) |
| 1993–1998 | 2,206 (23) | 8,358 (23) |
| 1999–2004 | 2,845 (30) | 10,746 (30) |
| 2005–2009 | 2,723 (29) | 10,350 (29) |
| MPN subtype | ||
| PV | 3,001 (32) | - |
| ET | 3,462 (37) | - |
| PMF | 1,488 (16) | - |
| MPN-U | 1,478 (16) | - |
| Total | 9,429 (100) | 35,820 (100) |
MPN=myeloproliferative neoplasm, PV=polycythemia vera, ET=essential thrombocythemia, PMF=primary myelofibrosis, MPN-U=myeloproliferative neoplasm unclassifiable