a nonsignificant trendp = 0.061
Running two further conditional logistic regression models (i.e., substituting the dummy variable “high-risk genetic combination” either with each variant of the genes of interest, or with an interaction term) demonstrated only a nonsignificant trend ( p = 0.061) for the stratum of patients corresponding to carriers of the “high-risk combination”, but the likelihood ratio test did not detect any significant difference between the two models ( p = 0.355). 4.