Adaptation of the PROFFIT Instrument Into Turkish: A Validity and Reliability Study

Adaptation of the Patient Reported Outcomes for Fighting Financial Toxicity of Cancer (PROFFIT) Instrument Into Turkish: A Validity and Reliability Study

The aim of this study is to evaluate the Turkish validity and reliability of the Patient Reported Outcomes for Fighting Financial Toxicity of Cancer (PROFFIT) developed in Italy.

The scale validity of the study will be evaluated through language and content validity, construct validity, criterion validity, and known-group validity methods; while the scale reliability will be assessed by calculating the Cronbach's alpha and McDonald's omega reliability coefficients.

Inclusion Criteria:

• Individuals diagnosed with solid cancer or hematologic malignancy, either histologically or cytologically, and aware of their diagnosis,
• Those who have received cancer treatment (chemotherapy, targeted therapy, immunotherapy, hormonal therapy, radiotherapy, or a combination of these treatments) within the last three months,
• Individuals over the age of 18,
• Those without a diagnosed psychiatric illness (such as depression, panic attacks, schizophrenia, etc.),
• Individuals without auditory or cognitive impairments,
• Turkish-speaking and literate volunteers.

Exclusion Criteria:

• Individuals who fill out the data collection forms incompletely or wish to withdraw from the study.