Table 3.

Univariate survival analysis

PredictorLevelMedian survival in days (95% CI)Hazard ratioP
PF4Continuous (n = 133)323 (283-385)1.080.003
PF4*≤11 kU/mL (n = 65)389 (313-467)1.00
>11 kU/mL (n = 68)254 (203-343)1.770.004
AgeContinuous (n = 133)323 (283-385)1.0240.005
Class*N0 (n = 32)401 (289-929)
N1 (n = 51)402 (336-455)1.270.37
M1 (n = 50)170 (116-314)2.85<0.0001
Gender*Female (n = 60)254 (189-367)
Male (n = 73)374 (291-448)0.610.013
Platelet CountContinuous (n = 124)323 (283-385)0.230.82
Stage*IA, I, IIA (n = 27)401 (255-∞)
IIB (n = 34)402 (343-467)1.500.19
III (n = 23)336 (283-∞)1.530.20
IV (n = 49)170 (116-314)3.22<0.0001
Treatment*No (n = 54)283 (179-411)
Yes (n = 76)343 (291-400)0.990.94
  • *Categorical variables were treated as ordered with the first level assigned as the reference.