Those sampled were sent a letter
inviting their participation, and a follow-up call to recruit
and screen the respondents was made. Exclusion criteria were
those who responded no to the question of their ability to
walk an 80 meter course. Thus, the target population the
non institutionalized population aged 55–85 years who self reported
the ability to walk 80 meters.The university’s human
research review board approved the study, and each subject
signed informed consent.