Table 3: Health outcomes by cohort.

65–74 yrs
  (%)
75–84 yrs
  (%)
85+ yrs
  (%)
(df)

Self-rated healtha33.030.000
 Poor
 Fair
 Good
 Very good
 Excellent
4.07
16.12
33.96
30.37
15.47
7.13
17.34
36.82
27.43
11.28
7.52
24.81
32.33
24.81
10.53
No ADL92.9488.1777.8255.81 (2)0.000
No IADL83.9469.4751.13147.22 (2)0.000

The Kruskal-Wallis statistic, a test of rank for nonparametric samples, was also conducted for each self-rated health to examine differences in the 3 groups. Results for the KW indicated significant differences in self-rated health between groups (KW = 23.194, df = 2, and ), with those who are 65 to 74 having the highest health (rank sum = 1,510,000), followed by those who are 75 to 84 (rank sum = 943,626), and those who are 85 and older having the lowest health (rank sum = 277,376).