This study aims to develop the Active Health Behavior Scale for Type 2 Diabetes Mellitus (T2DM) patients and evaluate its psychometric properties, including internal consistency reliability, test-retest reliability, content validity, construct validity, and criterion-related validity. Additionally, this research will investigate the current status of active health behaviors among T2DM patients and employ latent profile analysis (LPA) to identify distinct behavioral subtypes. Furthermore, differences in demographic, clinical, and psychosocial determinants across the identified latent classes will be examined to inform tailored intervention strategies.