Research has reported that the reasons for low implementation of CR are multifactorial at the health system, physician and patient levels. It has also been found that patients are more likely to initiate CR if physicians strongly and positively promote the importance of CR participation. Unfortunately, there are insufficient and ineffective data on CR, referral to CR and both clinical and cost-effectiveness outcomes of CR in Turkey. In this context, it is important to examine more objectively from the perspective of physicians who play a key role in referring patients to CR. However, in our country, there is no relatively objective measurement tool to evaluate physicians' attitudes towards CR. Therefore, this study aims to adapt the original "Physician Attitudes towards Cardiac Rehabilitation and Referral Scale-Revised (PACRR-R)" into Turkish and to examine its psychometric properties.

Inclusion Criteria:

• To be a physician,
• Providing active service in patient diagnosis and treatment

Exclusion Criteria:

• Not providing active service in patient diagnosis and treatment despite being a physician (administrative position, etc.).

The population of the study is physicians. The sample was physicians who volunteered to participate in the study, to whom the study could be announced/notified, and who provided active service in patient diagnosis and treatment. In the literature, it is stated that the number of individuals to be included in the study in order to achieve meaningful and valid results in the scale development process is at least 5 times the number of items in the scale and ideally 10 times. In our study, the number of individuals to be included in the study to test the validity of the scale was planned to be at least 100 individuals (PACRR-R consists of 20 items). In order to examine the test-retest reliability of the scale, it was planned to reapply the scale to at least 25% of the individuals in the sample.