Which statement by a client recovering from major depression indicates improvement to the nurse?

The statement indicating improvement is the client expressing that they "don't think about killing myself as much as I used to." This reflects a measurable decrease in suicidal ideation, which is a significant concern in clients recovering from major depression. The reduction in the frequency of self-harm thoughts suggests that the client is experiencing a shift in their mental state and may be demonstrating an increased level of adaptive coping.

In the context of major depression, a client who is starting to feel better often begins to report fewer negative thoughts about themselves and their situation. This statement is a positive marker of recovery, suggesting that the client might be moving toward a more hopeful outlook and regaining a sense of control over their thoughts and emotions.

The other statements do not convey improvement. They either express continued negative thought patterns or a sense of worthlessness, which are indicative of ongoing struggles with depression. Such views can often signify that the client is still grappling with feelings of hopelessness and may still be at risk for suicidal ideation.