Based on the analysis and findings of this research, it can be concluded that hospitalization can have a significant impact on adult patients’ mental health. The results indicate that hospitalization was associated with increased levels of anxiety, depression, and stress among adult patients. This suggests that hospitalization can be a stressful and emotionally challenging experience for many patients. Additionally, the study found that the length of hospitalization was a significant factor in predicting the severity of mental health symptoms. Patients who had longer hospital stays tended to report higher levels of anxiety, depression, and stress during their stay period and even after discharge. These findings highlight the importance of providing psychological support and counseling services to patients during and after hospitalization. Therefore, the healthcare system should prioritize mental health care for hospitalized patients to help them cope with emotional and psychological stress of hospitalization. Future research in this area could explore the effectiveness of different interventions such as mindfulness-based stress reduction or cognitive-behavioral therapy in mitigating the negative mental health effects of hospitalization. Overall, the results of this study add to the growing body of research on the importance of mental health care in the hospital setting.