Table 1.

Classification of aging groups [19].

Successful Cognitive Aging	Usual Aging	Mild Cognitive Impairment
Absence of six chronic diseases, including diabetes mellitus, hypertension, cancer, heart diseases, chronic lung diseases, and stroke	Scored above MCI and below SA in most of the cognitive test administered	Subjective memory complaint
No limitations in functional status with full score for both Activities of Daily Living and Instrumental Activities of Daily Living	Not demented	Objective memory impairment determined by Digit Span and Rey Auditory Verbal Learning Test with score at least 1.5 SD below the mean average
Normal global function with Mini Mental Examination State (MMSE score ≥ 22)	No or minimal in functional status	Not demented
Not depressed with Geriatric Depression Scale-15 score ≤ 4		No limitations in basic activities of daily living
Good quality of life		No or very minimal in instrumental activities of daily living by having a score of ≤1.5 SD from mean norm
Good self-perceived health		Global function by having MMSE score of ≥19