Validation of the Sinhala Translation of the EORTC QLQ-INFO25: Enhancing Information Provision for Cancer Patients in Sri Lanka.

Cancer is a major health challenge globally and in Sri Lanka. Providing comprehensive information to patients is crucial for improving treatment outcomes and patient satisfaction, supported by evidence of its effectiveness in managing cancer pain. EORTC QLQ-INFO25, an information module developed by the European Organisation for Research and Treatment of Cancer (EORTC) Quality of Life Group, is aimed at assessing cancer patients' perception of information received during different phases of care. This study aims to validate the Sinhala translation of the EORTC QLQ-INFO25, a module that assesses the quality of patient information, for use among Sri Lankans with cancer. EORTC QLQ-INFO25 underwent forward and backward Sinhala translation, expert reviews, and pilot testing with 15 cancer patients. Questionnaires were administered to patients with cancer at the National Hospital in Colombo, independently or with interviewer assistance. Reliability and validity were statistically analyzed. Of 102 participants, 100 (98.03%) completed the questionnaire. Internal consistency was high (Cronbach's α = 0.89). The multi-item scales demonstrated good convergent validity. Each item showed high correlation with its respective scale. Divergent validity was established as none of the scales had correlations over 0.5 with the EORTC QLQ-C30. Known-group validity revealed significant differences in information satisfaction between genders. Test-retest reliability was high (ICC = 0.86), confirming stability over time. The Sinhala translation of EORTC QLQ-INFO25 demonstrates satisfactory reliability, validity, reproducibility, and compliance for assessing information provision in cancer care among patients in Sri Lanka.