PROGNOSIS IN ADVANCED NON-SMALL CELL LUNG CANCER - A RETROSPECTIVE STUDY EXAMINING ECOG PERFORMANCE STATUS SCORES OF PATIENTS

Abstract

Objective: Increasing prevalence and poor survival of advanced incurable non-small cell lung cancer (NSCLC) make it a major health problem globally, especially in developing countries. This awakens need for identification of the strongest prognostic factor that helps in the selection of appropriate treatment and hence palliates symptoms and improves survival. Lung cancer treatment guidelines advise performance status (PS) as the most established prognostic factor in advanced NSCLC patients. This study investigated the prognostic significance of PS.Methods: An observational study was done for 163 advanced NSCLC adult Malaysian patients in Radiotherapy and Oncology Clinic, Hospital Kuala Lumpur, Malaysia. Demographic and clinical data were recorded. Kaplan-Meier test was used to measure median overall survival (OS) and Cox proportional hazard model to calculate the hazard ratio for different categories of Eastern Cooperative Oncology Group (ECOG) PS.Results: The mean age and body weight were 56.7±10.1 years old and 57.42±13.5 kg, respectively. Majority patients were male (68.7%), Stage IV NSCLC (65.0%), and ECOG PS score of 2 (41.1%). ECOG PS had a significant association with age and body weight. Median OS was least for ECOG PS score of 4 (253 days) and was statistically significant (p=0.003). ECOG PS was a significant independent prognostic factor for survival in advanced NSCLC patients (p<0.001).Conclusion: PS is a strong prognostic factor in advanced NSCLC.