Dance Intervention in Breast Cancer Treatment

The instrument used to assess pain will be the Brief Pain Inventory (BPI). The questions using a numerical scale from 0 to 10. The higher scores mean a worse pain and lower scores mean a better pain or absence of pain.

The Piper Fatigue Scale (PFS-P) will be the multidimensional instrument used to assess fatigue. It uses a score of 4 as the cutoff point (a score equal to or less than 4 indicates no fatigue; a score greater than 4 indicates the presence of fatigue).

The instrument used to assess Quality of life will be the European Organization for Research and Treatment of Cancer Quality of Life Questionnaire (EORTC QLQ-C30). The questions are using a numerical scale from 0 to 100 for scales. In the functional and global scales the EORTC-BR 30, the higher scores mean a better quality of life and lower scores mean a worse quality of life. Unlike, in the symptom scale EORTC-BR 30, the higher scores mean a worse quality of life and lower scores mean a better quality of life.

The instrument used to assess Quality of life specifically for breast cancer will be the European Organization for Research and Treatment of Cancer Quality of Life Questionnaire (EORTC-BR). The questions are using a numerical scale from 0 to 100 for scales. In the functional scale the EORTC-BR 23, the higher scores mean a better quality of life and lower scores mean a worse quality of life. Unlike, in the symptom scale the EORTC-BR 23, the higher scores mean a worse quality of life and lower scores mean a better quality of life.

The Berg Balance Scale will be the multidimensional test used to assess balance. It uses a score of 4 as the cutoff point (a score equal to or less than 4 indicates unable; a score greater than 4 indicates independent).

In the 6-minute walk test, the distance covered accurately reflects the patients' physical capacity to perform routine tasks. The higher scores mean a better functional capacity and lower scores mean a worse functional capacity.

The Lower Extremity Motor Coordination Test this is a simple test performed in a seated position, with the individual barefoot. A platform with two red circles, spaced 30 cm apart, is placed on the floor in front of the participant. The individual must alternately touch the circles with the big toe for a duration of 20 seconds. The score is given by the number of correct answers. The higher scores mean a better motor capacity and lower scores mean a worse motor capacity.

Flexibility will be assessed using the Schober Test, which measures functional flexibility and is specifically focused on the low back. The test assesses lumbar movement restrictions through markings: over the lumbosacral joint (connecting the posterior superior iliac spines) and 10 cm above; the distance between these marks is recorded while in an upright position. Immediately after, the subject performs a maximal trunk flexion (with lower limbs extended), and the evaluator measures the new distance between the points with a measuring tape and records the difference between the marks based on the patient's best reach in relation to the floor. The higher scores mean a better flexibility and lower scores mean a worse flexibility.

To assess self-esteem, the adapted and validated Portuguese version by Hutz of the Rosenberg Self-Esteem Scale will be used. The total score ranges from 10 to 40 points. The higher scores mean a better self-esteemy and lower scores mean a worse self-esteem.

The Pittsburgh Sleep Quality Index (PSQI-BR) is used to assess sleep quality. The total score ranges from 0 to 21 points. Scores above five indicate poor sleep quality, and scores equal to or lower five indicate good quality.

Anxiety and depression will be assessed using the Hospital Anxiety and Depression Scale (HADS) questionnaire. The total score ranges from 0 to 21 points. It cutoff points will be adopted: an anxiety indicative score equal to or greater than 8; and a depression indicative score equal to or higher than 9.