Originally posted by MeowMix
I also was raised by a single mother, worked from age 11, worked my way through college, supported my sisters, etc.. I did not claim disadvantaged. I asked a bunch of people I know who grew up in worse circumstances, and none of them said they would consider themselves "disadvantaged" (none of them are pre-meds). Remember that many med school faculty grew up in circumstances that were not particularly favorable, yet probably don't consider themselves disadvantaged.
The AMCAS guidelines are vague, but if you look for example at UCSF's secondary, you will see that they want a lot of detail about your "disadvantaged" claim. I think that you are better off discussing hardships briefly in your personal statement, and not claiming disadvantaged unless you experienced great hardship.