Additionally, the explanatory power of predictors for selfmanagement
behavior was 58.0%. This result is even higher than
it was in Choi's study (24.1%) [35]. Based on the IMB model, Choi
surveyed older patients with type 2 diabetes to investigate the
causal relationship between information, motivation, and behavioral
skills (but excluded health outcome) [35]. In light of these
results, the self-management behavior of young people with type 2
diabetes is more influenced by motivation and behavioral skills
compared to older patients. Moreover, Osborn and Egede [42]
examined the causal relationship using only three predictorsdinformation,
motivation, and self-management behavior
(excluding behavioral skill)din their IMB model. They reported
that the explanatory power of information and motivation for selfmanagement
behavior was 17%, which is far lower than the power
of this study. This result shows that behavioral skills (self efficacy)
are very important to the patients' performance of selfmanagement
behavior.