The purpose of research is to know about the effect of assertive behavior to depression on diabetes mellitus patients. This study used pre-experimental design with ao ne-group pre-post test t design. The sample used is 1 7 people selected by purposive sampling technique. The results showed that the category of depression before being given assertive behavior treatment mostly in the moderate depression as many as 1 1 people (64.7%), and after being given assertive behavior showed that a decrease in the number of moderate depression to be 9 people ( 52.9 %). The results of this study were tested by paired-sample t-test statistic, the results obtained value (р) = 0.01 5 . The conclusion of research is assertive behavior can decrease the level of depression in patients with diabetes mellitus.

The purpose of research is to know about the effect of assertive behavior to depression on diabetes mellitus patients. This study used pre-experimental design with ao ne-group pre-post test t design. The sample used is 1 7 people selected by purposive sampling technique. The results showed that the category of depression before being given assertive behavior treatment mostly in the moderate depression as many as 1 1 people (64.7%), and after being given assertive behavior showed that a decrease in the number of moderate depression to be 9 people ( 52.9 %). The results of this study were tested by paired-sample t-test statistic, the results obtained value (р) = 0.01 5 . The conclusion of research is assertive behavior can decrease the level of depression in patients with diabetes mellitus.