0  The percentage represents the number of students who answered correctly out of all the students who answered the particular question (n). Students who did not answer a question were considered absent from the statistic regarding that particular question. The selection of 'don't know' as an answer was considered as a wrong answer.  The percentage represents the number of students who answered correctly out of all the students who answered the particular question (n). Students who did not answer a question were considered absent from the statistic regarding that particular question. The selection of 'don't know' as an answer was considered as a wrong answer.  Table  [0](#T0){ref-type="table"} shows the percentages of correct responses to knowledge items by medical school year