Knowledge of Illness and Drugs Inventory; KIDI
This inventory was developed by Maeda, Mukasa, and Ogoh (1992) to assess patients' knowledge regarding their illness and the effects of medication on it. The KIDI comprises two sub-scales: 10 items assessing the patients' knowledge of their illness and 10 items assessing the patients' knowledge of the effects of antipsychotic drugs. This inventory consists of a self-reported inventory that asks patients to select the correct answer from three choices, with higher scores representing greater knowledge. In the current study, the Cornbrash’s alphas coefficient had been reported to be .83 for the total scale (Matsuda, 2008).
Data Analysis
Descriptive statistics were used to understand the characteristics of the intervention and control groups. The independent samples t-test or chi-square test was used to verify the homogeneity of the distribution of each characteristic between the two groups. The intervention group who completed the program were analyzed. Two-way factorial repeated measures ANOVA was used to evaluate the effects of the NPE on acceptance of medication and the patients' knowledge regarding their illness and the effects of medication on it. The two factors were “group” (intervention group and control group) and “time” (before and after the intervention). The data were analyzed using SPSS 20.0 for Windows.