95 scaled on the shelf. I had done surgery, psych, and family before this rotation, shelfs in the high 90s. Knowledge from the surgery shelf is definitely useful for this shelf.
Resources: Case Files x 2, NMS Casebook Medicine x1 (excellent book), and lightly skimmed Step Up to Medicine (dense and difficult to retain for me personally). Skimmed UpToDate very lightly during the rotation for patients' problems. I watched all of the Kaplan Step 2 internal medicine video lectures as well before the rotation started, and had watched Pestana a while before for surgery. On the whole, very happy with the reading resources I chose.
Questions: did the Kaplan Internal Medicine Qbank several months before the rotation (69% overall), Pretest Medicine (85% overall), MKSAP 3 (80% overall), MKSAP 4 and 5 (85% overall on both).
Pretest seemed too easy -- nearly all one step reasoning except for a few gems like the matching section on pleural effusions. MKSAP questions seemed slightly easier than the shelf, though the acid-base and cardiology sections are great review, in my opinion. I didn't use UW -- saving the bank for Step 2 studying. The Kaplan questions range from bad to terrible for preparation, but still better than nothing. (The main Kaplan qbank IM questions are slightly better than their separate IM qbank, but I didn't use the main qbank for my shelf or rotation study)
Shelf: despite complaints of long stems and answer choices, I found it quite comparable to the surgery and psychiatry shelfs. Content is mostly well-represented by MKSAP and Kaplan, though there are always going to be random questions from other rotations on there, as others have pointed out. Reasonable amount of outpatient internal medicine (screening guidelines, preventative medicine, etc.) so these should be studied even if they are not directly applicable to wards. There are also a very few basic science, Step 1-type questions, generally way out of the left field, that are more or less impossible to study for beforehand.
On the whole, most of the questions on the shelf were relatively straightforward and still classic presentations and buzzword bingo, but the more challenging questions ask about in-depth management and require some thinking.
By my estimates of remembered questions that I later looked up and know for certain I got wrong, one can miss at least 10 questions (and likely around 20 or more, by my estimates) and still get my score.
