The TMIG-IC consisted of 13 multidimensional items classified under three subscales of instrumental self-maintenance, intellectual activity and social role.
A score for each subscale of this index was also used to measure the capacity levels of instrumental self-maintenance, intellectual activity, and social roles.
The Tokyo Metropolitan Institute of Gerontology Index of Competence (TMIG) focuses on self-reported activities in the environmental domain, and measures higher-level functional capacity such as instrumental self-maintenance, intellectual activity and social role [ 22].
There was no association between cancer mortality and any score groups for total functional capacity, instrumental self-maintenance activity, intellectual activity, or social roles activity.
No association was found between cardiovascular mortality and the scores of total functional capacity, instrumental self-maintenance activity, intellectual activity, and social roles activity (Table 3).
15– 17, 20 In the present study, no significant association was found between cardiovascular mortality and total functional capacity, instrumental self-maintenance activity, intellectual activity, or social roles activity.
However, our findings indicate that although the mortality from all causes, respiratory disease, and senility can be predicted by the level of instrumental self-maintenance activity, mortality due to cardiovascular disease and cancer cannot be predicted by high-level ADL scores including instrumental self-maintenance and intellectual and social roles.
Table 3 shows the results of our multivariate Cox analyses of mortality and the TMIG index scores for total functional capacity, instrumental self-maintenance activity, intellectual activity, and social roles activity, which were adjusted for gender, smoking, BMI, serum level of albumin, glucose, and total cholesterol.
Senility mortality was also associated with instrumental self-maintenance activity and intellectual activity, but was not associated with total functional capacity or social roles activity.
Similarly, mortality due to senility fell by 16%, 29%, and 29% with one-point increases in the scores for total functional capacity, instrumental self-maintenance activity, and intellectual activity, respectively, but there was no association between senility mortality and social roles activity (Table 3).
