Final answer:
The nurse should identify decreased sodium as a positive outcome of the non-surgical treatment for Cushing's disease.
Step-by-step explanation:
The nurse should identify decreased sodium as a positive outcome of the non-surgical treatment for Cushing's disease. Cushing's disease is caused by excessive cortisol levels, which can lead to increased sodium reabsorption in the kidneys, resulting in high sodium levels. Therefore, decreasing sodium levels would indicate that the treatment is effective in normalizing cortisol levels.