Table 1: Summary of semographic characteristics.

Demographic characteristicsOctogenarians ( 𝑛 = 7 2 )Centenarians ( 𝑛 = 2 3 4 ) 𝜒 2
𝑛 % 𝑛 %

Gender5.72*
 Female5069.419382.5
 Male2230.64117.5
Type of residence35.52***
 Private home/Apartment5886.69745.5
 Personal care (Assisted Living)11.54119.2
 Nursing home811.97535.2
Ethnicity2.02
 White/Caucasian6184.717976.5
 Black/African American1115.35523.5
Education22.58**
 0–4 years11.5114.9
 5–8 years23.05323.8
 Some high school69.02611.7
 High school diploma1826.94319.3
 Trade school or vocational degree811.92812.6
 Some college913.4229.9
 College degree1319.4198.5
 Graduate degree1014.9219.4
Marital status54.15***
 Never married11.594.3
 Married2638.8104.7
 Widowed3653.718286.3
 Divorced46.094.3
 Separated00.010.5
Cognitive status63.59***
 Low (MMSE ≤ 17)912.511248.3
 Mid (18 ≤ MMSE ≤ 22)11.44419.0
 High (MMSE ≥ 23)6286.17632.7

𝑃 < 0 . 0 5 . ** 𝑃 < 0 . 0 1 . *** 𝑃 < 0 . 0 0 1 .