“…Possible predictive factors have been evaluated in various types of operations. However, conflicting data were obtained regarding the value of factors such as personal characteristics, 1,11 emotional distress, 16 depressive mood, 3,4,27 state and trait anxiety, 3,17,18,20,22,23,27 sex, 11,18,19,27 and age. 18, 19 Recent data indicate that preoperative response to experimental pain stimuli such as cold pressor test, electrical skin stimulation, heat stimuli, and burn injury may predict the intensity of postsurgical pain.…”