Table 2.

Cox proportional hazards modeling (ischemic stroke)

VariableRelative hazard95% CIp Value
Clinical syndrome was a stratification factor.
PTT = partial thromboplastin time.
ε4 Dose (0, 1, or 2)0.72 (per allele)0.54 –0.970.03
PTT ratio (linear)0.180.05 –0.620.01
PTT ratio (quadratic)2.621.05 –6.570.04
NIH stroke scale1.08 (per additional point)1.05 –1.12<0.00001