The aim of this study was to perform a cross-cultural adaptation and psychometric evaluation of the Quality of Recovery 15 questionnaire in Turkey.

The QoR-15 was translated into Turkish through a rigorous process involving independent translations, consensus, back-translation, and review. The questionnaire was administered to patients undergoing elective major gastrointestinal surgery preoperatively and on postoperative days 1, 7, and 30. Reliability was assessed using Cronbach's α and intra-class correlation coefficient. Construct validity was evaluated through confirmatory factor analysis, and responsiveness was analyzed using Cohen's effect size and standardized response mean.

Inclusion Criteria:

• being over age of 18 and had a planned elective major gastrointestinal surgery

Exclusion Criteria:

• under 18 years of age, had an alcohol or substance addiction problem, refused to participate in the study, had a previous major abdominal surgery

510 patients who met the inclusion criteria of being over age of 18 and had a planned elective major gastrointestinal surgery were included in the study.