GRE Confusion

I am confused about the way the graduate programs evaluate GRE scores. I will start nursing school in May, which will take 15 months since I already have another degree. I have already taken the GRE, but am not sure how my score will compare. Do graduate programs (CRNA) look at all three sections, or just the verbal and quantitative? I read on another thread that the minimum score for most programs is 1500, so is that for all three sections combined, or just the verbal and math? I would appreciate any knowledge on this. I am new to this site!