[1] Inst Univ Geriatrie Montreal, Ctr Rech, Montreal, PQ, Canada
[2] Simon Fraser Univ, Gerontol Res Ctr, Vancouver, BC V6B 5K3, Canada
[3] Univ British Columbia, Dept Occupat Sci & Occupat Therapy, Vancouver, BC V5Z 1M9, Canada
[4] Univ British Columbia, Sch Nursing, Vancouver, BC V5Z 1M9, Canada