My work is about two cohorts of patients: the first reactivating a viral infection during chemoterapy courses and the second non reactivating it.

I identified 4 potential risk factors for the viral reactivation: the kind of chemo (only 2 types in play, so it's a binomial variable), the blood levels of specific anti-viral antibodies, the total antibodies and the blood levels of lymphocytes (the last 3 are continuous variables). Then i confronted the two cohorts.

I performed Fisher's exact test for the first variable and Mann-Whitney U-test on the other 3 variables. All the 4 variables resulted statistically significant and associated to the viral reactivation in this univariate setting.

Considering that i want to strenghten the significance of my work, i would like to perform some kind of multivariate analysis, but i don't know if it's possible (given i have a both a categorial variable and continuous variables to consider) and i don't know how to proceed.

Thank you very much for your answers!