All I'm familiar with is that most of the evidence that is cited on the difficulties that Canadians have accessing health care are based on answers that people gave to questions in various kinds of survey questionnaires. I'm not clear on how reliable that data is and exactly how it should be interpreted.
Colleen is citing evidence on people who died. As to how you attribute the cause of death and to what extent it had to do with lack of access to necessary medications, I don't know. It's a little bit difficult to see what kinds of studies one would have to undertake in order to have a good answer to that question. For example, what are the health consequences of lack of access to medications? Exactly how one would do that, I'm not sure, but obviously one could do it better.