Validity and reliability of the Turkish version of the peace, equanimity, and acceptance in the cancer experience (PEACE) scale.

Abstract

Objectives: This study sought to examine the validity and reliability of the Turkish adaptation of the Peace, Equanimity, and Acceptance in the Cancer Experience (PEACE) scale. The primary objective was to evaluate the scale's psychometric properties in measuring acceptance and coping among cancer patients.

Methods: The study included 90 cancer patients who completed the 12-item PEACE scale. The scale consists of two distinct subscales: the 5-item Peaceful Acceptance subscale and the 7-item Struggle With Illness subscale. Reliability was examined using Cronbach's alpha and test-retest reliability (r = 0.916). Content validity was assessed using the content validity index (CVI = 0.84). Both exploratory factor analysis (EFA) and confirmatory factor analysis (CFA) were employed to examine the underlying factor structure and evaluate model fit indices.

Results: The internal consistency for both subscales was satisfactory (Cronbach's α = .78 for both). EFA indicated that the two subscales explained 53.169% of the total variance. CFA substantiated the two-factor model, demonstrating adequate model fit indices (χ²/df = 1.689,Root Mean Square Error of Approximation = 0.088). These findings collectively establish the Turkish version of the PEACE scale as a psychometrically sound tool.

Significance of results: The PEACE scale is a valid and reliable instrument for assessing levels of acceptance and coping in cancer patients. Its use can help healthcare professionals better understand patients' emotional states and guide interventions aimed at improving their quality of life.