It sounds simple enough when you look at the box, but you’d be surprised.
First of all, if your infection isn’t raging out of control, you may not get any results at all unless you test first thing in the morning, because neither leukocytes nor nitrites have built up enough in your urine for the reagent to pick up on them. So if you feel like you have something, but you take a test and don’t see anything, wait till first thing the next morning to get a true read.
Secondly, nitrites are more easily flushed out of your urine, (they take 4 hours to build up in it) so you can feel something coming on and take a test in the afternoon and only see leuokocytes, (the top one that turns tan-purple) making you think that you have a gram positive infection, and then you can take something for it and test again the next morning, and see only nitrites (The one that turns pink).
I wish I had a picture of my expression when this happened to me.