To determine the effect of motivational interviewing based on Pender's health promotion model on patient-reported outcomes in patients with COPD.

Nursing, which arises from human needs, evaluates the individual, family, and society with a holistic perspective to protect, maintain, and improve the health of healthy/sick individuals, families, and communities, and provides the necessary health services. The primary duty of nurses is to provide care for individuals and improve their quality of life. In this regard, nurses fulfill their duties by using their roles such as counselor, educator, decision-maker, manager, researcher, and caregiver. Nurses have significant responsibilities in the care of chronic diseases that require lifelong care and follow-up.

One of the major chronic diseases requiring lifelong care is Chronic Obstructive Pulmonary Disease (COPD). COPD is a progressive, irreversible disease characterized by airflow obstruction, accompanied by various symptoms, and is a serious health problem with high mortality and morbidity, commonly encountered worldwide. Approximately 3.2 million people die annually from COPD globally, and it is projected that this disease will be the third leading cause of death worldwide by 2030. COPD patients experience many physical and psychological issues that severely affect their quality of life, such as fear of death, anxiety, cough, dyspnea, fatigue, and loss of appetite . COPD patients are frequently hospitalized, face difficulties in performing daily activities, encounter social and economic losses, and experience a significant decline in quality of life due to the side effects of medications.

Among the long-term management goals of disease control are the reduction of current symptoms and future risks. These goals require patients to exhibit healthy behaviors. However, the literature reports that COPD patients have low levels of self-care, poor adherence to medications, and a lack of awareness regarding preventable and behavioral causal factors. COPD patients need strategies that will engage them in the treatment process, motivate them toward healthy habits, and help internalize healthy behaviors. Compared to other strategies, motivational interviewing (MI) embodies most of these qualities. MI is defined as "collaborative, person-centered form of guiding and counseling to elicit and strengthen motivation for change". The MI technique is a distinctive and superior approach to other interview methods due to its effectiveness in helping individuals make behavioral changes, its empathetic and collaborative approach, its ability to increase intrinsic motivation, and its strategies for dealing with resistance. MI aims to promote change by increasing the patients intrinsic motivation, making it especially effective for patients with more specific change goals.

The use of nursing models in the care of COPD patients has been associated with better patient outcomes, higher nurse satisfaction, and lower healthcare costs. Pender's Health Promotion Model (HPM) provides nurses with a comprehensive framework for conducting effective care and assessing individuals perceptions of health behaviors. The model assumes that individuals have a holistic structure in their physical environment and interpersonal relationships and play an active role in maintaining and promoting their health. The goal of the model is to explain the components of behaviors necessary for a healthy lifestyle, evaluate individuals experiences, analyze factors that may affect their perceptions of health behavior, and guide care providers in planning healthy lifestyle goals. In light of this information, it is recognized that MI and HPM share common goals and possess complementary dynamics. Addressing lifestyle changes with Pender's model and integrating MI for health promotion has been reported to be more effective in managing COPD patients symptoms. Dişsiz and Çalışkan also suggest that nurses can use HPM and MI, which are thought to complement each other, while helping patients acquire healthy lifestyle behaviors.

Patient-reported outcomes are necessary to assess the symptoms, the impact of symptoms on their lives, and their response to treatment. Patient-reported outcomes provide direct reports of patients perceived health statuses. While the primary role of nurses is caregiving, they should also engage in roles such as educator, therapist, counselor, and researcher to implement interventions that improve the care of COPD patients. Nurses should support individuals to use their potential strengths and help them adopt health behaviors through health promotion programs. MI and the Health Promotion Model have been shown to be effective strategies and models in facilitating health behavior change. Based on this information, this research was conducted to determine the effect of motivational interviewing based on Pender's Health Promotion Model on patient-reported outcomes in COPD patients.

Inclusion Criteria:

• Being over 18 years of age,
• Volunteering to participate in the study,
• Being literate,
• Having GOLD Stage II and III COPD,
• Receiving COPD treatment for more than 6 months,
• Having a smartphone for online interviews,
• Not having sensory loss related to hearing and vision,
• Not having a history of psychiatric diagnosis,
• Being suitable for applying cognitive level scales.

Exclusion Criteria:

• Having GOLD Stage I and IV COPD,
• Having serious pulmonary and malignant disease,
• Not being able to communicate in Turkish,
• Being in an exacerbation period,
• Having a history of psychiatric diagnosis.