I wouldn't expect to hear anything from UIC until closer to March. I wouldn't be surprised if it is March, when you hear back from them. Spring break this year is the week of March 26, the last week of March. They'll e-mail the interview request.
The top 300 applicants will be chosen for interviews. There are 162 seats, but about 15 of them are already taken up by GPPA students. So, if you make interview, you'll have a 50/50 shot of being accepted.