Mention mental health issues in personal statement?

i'm applying to study medicine as a mature student, i'm due to start an access to medicine course in september and i'm beginning to draft my personal statement but i'm wondering whether i should mention why i failed my AS levels when i was 17. basically my AS result were D E U so they don't count as a level 3 qualification buuut i did begin my A2's (dropped out later and didn't sit any A2 exams) and i did submit a UCAS application and recieved offers. will uni's be able to view my initial UCAS application? if they can i think i should mention the depression and anxiety which hampered my studies and eventually lead to me dropping out. or will that be seen as a cop out? i sat my AS's in 2009 and have been out of education since then so should i mention what lead to me leaving education? thanks