The most interesting thing I found on the EPSCO website was the scale that the studies measured the patients pain. This is how they determine how affective the art therapy is on cancer patients and their physical pain.
("We used the Edmonton Symptom Assessment Scale
(ESAS) to assess physical and psychological distress. We
recorded the ESAS results collected 1 h before and after the
art therapy session. A Wilcoxon test was used to compare
pre- and postintervention ESAS scores. A p value less than
0.05 indicated statistical significance.")
