Characteristic, N OS, y, median, (range) OS, Hazard Ratio (95% CI)* Univariate P Value Multivariate P Value
Age (y), N, median, range
≤60, N= 77, 52 (14-60)
60-70, N=91, 66 (61-69)
≥70, N=105, 75 (70-92)

5.3 (0-28.5)
3.1 (0.1-18.3)
3.2 (0.1-13.7)

1.0
1.9
2.2

N/A
0.001
< 0.001


0.001
< 0.001
IPSS
Low, N=92
Intermediate 1, N=126
Intermediate 2, N=38
High, N=17

5.8 (0.2- 24.3)
3.4 (0.0-28.5)
1.5 (0.3- 17.4)
2.3 (0.1-6.6)

1.0
1.9
3.8
5.8

N/A
< 0.001
< 0.001
< 0.001

N/A
0.002
0.001
0.001
Platelet category (Count)
Low (<100,000)
Normal (100,000-450,000)
High (>450,000)

2.2 (0.1-28.5)
5.8 (0.3-21.2)
3.3 (0-14.7)

1.8
1.0
1.5

0.001
N/A
0.065

0.002
N/A
0.035
1N-Number; OS-Overall survival; y-years; CI-Confidence Interval; N/A- Not applicable
Table 2: Multivariate Analysis of Prognostic Parameters for Survival1 .