That's true. StatsCan's data is self-reported, so people indicate whether they've had any limitation that causes them difficulty in terms of participating in the community or in the labour market, whereas the CPPD uses a much more stringent and medically certified definition of “disability” whereby a person has to say that they are completely incapable of working, and that has to be documented.
On September 26th, 2006. See this statement in context.