I have a question. I computed nonparametric bootstrap hazard ratios for the variable X (X=0 vs. X=1) using 250 replications (proc surveyselect), which are given below:

CI95_lower CI95_median CI95_upper
0.66051 0.90034 1.23374

There seems to be no difference in rates of the investigated endpoint as a function of X. When I try to calculate the p-value for 1 being included (no difference between X=0 and X=1) in the bootstrap confidence interval, I get the p-values below:

N lt1 gt1
250 0.692 0.308

Here I would choose P=0.31 for a protective effect of X on the investigated endpoint (hazard ratio <1 for X=1 vs. X=0). But what if I had no knowledge about the direction of the effect? How can I know, which of the one-sided p-values I should use?

Thanks!