ET treatment by R-IPSET risk score in ExT and non-ExT patients
| . | Total . | Platelet count ≥1000 × 109/L . | P value . | |
|---|---|---|---|---|
| No . | Yes . | |||
| n = 402 (%) . | n = 291 (72) . | n = 111 (28) . | ||
| Very low risk, n = 118 | ||||
| No treatment | 5 (4) | 2 (3) | 3 (6) | .66∗ |
| Aspirin alone | 44 (37) | 30 (47) | 14 (26) | .023∗ |
| Aspirin with cytoreductive agent | 61 (52) | 29 (45) | 32 (59) | .14∗ |
| Any cytoreduction | 69 (58) | 32 (50) | 37 (69) | .060∗ |
| Low risk, n = 123 | ||||
| No treatment | 1 (1) | 1 (1) | - | >.99∗ |
| Aspirin alone | 49 (40) | 45 (45) | 4 (17) | .011∗ |
| Aspirin with cytoreductive agent | 60 (49) | 44 (44) | 16 (67) | .068∗ |
| Any cytoreduction | 72 (59) | 52 (53) | 20 (83) | .0059∗ |
| Intermediate risk, n = 56 | ||||
| No treatment | 1 (2) | - | 1 (6) | .30∗ |
| Aspirin alone | 8 (14) | 6 (15) | 2 (12) | >.99∗ |
| Aspirin with cytoreductive agent | 43 (77) | 32 (82) | 11 (65) | .18∗ |
| Any cytoreduction | 47 (84) | 33 (85) | 14 (82) | >.99∗ |
| High risk, n = 105 | ||||
| No treatment | - | - | - | >.99∗ |
| Aspirin alone | 5 (5) | 3 (3) | 2 (12) | .17∗ |
| Aspirin with cytoreductive agent | 86 (82) | 75 (84) | 11 (69) | .16∗ |
| Any cytoreduction | 99 (94) | 86 (97) | 13 (81) | .044∗ |
| . | Total . | Platelet count ≥1000 × 109/L . | P value . | |
|---|---|---|---|---|
| No . | Yes . | |||
| n = 402 (%) . | n = 291 (72) . | n = 111 (28) . | ||
| Very low risk, n = 118 | ||||
| No treatment | 5 (4) | 2 (3) | 3 (6) | .66∗ |
| Aspirin alone | 44 (37) | 30 (47) | 14 (26) | .023∗ |
| Aspirin with cytoreductive agent | 61 (52) | 29 (45) | 32 (59) | .14∗ |
| Any cytoreduction | 69 (58) | 32 (50) | 37 (69) | .060∗ |
| Low risk, n = 123 | ||||
| No treatment | 1 (1) | 1 (1) | - | >.99∗ |
| Aspirin alone | 49 (40) | 45 (45) | 4 (17) | .011∗ |
| Aspirin with cytoreductive agent | 60 (49) | 44 (44) | 16 (67) | .068∗ |
| Any cytoreduction | 72 (59) | 52 (53) | 20 (83) | .0059∗ |
| Intermediate risk, n = 56 | ||||
| No treatment | 1 (2) | - | 1 (6) | .30∗ |
| Aspirin alone | 8 (14) | 6 (15) | 2 (12) | >.99∗ |
| Aspirin with cytoreductive agent | 43 (77) | 32 (82) | 11 (65) | .18∗ |
| Any cytoreduction | 47 (84) | 33 (85) | 14 (82) | >.99∗ |
| High risk, n = 105 | ||||
| No treatment | - | - | - | >.99∗ |
| Aspirin alone | 5 (5) | 3 (3) | 2 (12) | .17∗ |
| Aspirin with cytoreductive agent | 86 (82) | 75 (84) | 11 (69) | .16∗ |
| Any cytoreduction | 99 (94) | 86 (97) | 13 (81) | .044∗ |
Boldface type for P values indicates statistical significance.
Fisher's exact test.