Just look at the score report. Try to see if you placed around the average for your PGY year. For any sections where you got less than average (% ile-wise) for your PGY year, you should go study that. If you got 20 or 30 %ile on 1 or 2 sections, that doesn't mean you are going to fail the IM boards. However if you are getting 10 or 20th %ile on a whole bunch of sections, that suggests a knowledge gap. You also have to take into account how tired you were when you took the test...I took it postcall after no sleep the prior night when I was an intern and only scored 50 or 60th %ile for interns, which my PD thought was truly awful, but since I didn't study for the test (didn't really have much time with Q3/Q4 call all the time, and PD told us not to study and that the test was only for practice for interns) it probably wasn't so terrible. ...