An emotional component analysis of chronic pain.

The present study sought to determine the relative contribution of frustration, fear, anger and anxiety, to the unpleasantness and depression pain patients experience. Sixty-nine women and 74 men, with an average age of 47 years, were included. Patients underwent psychological evaluation which included use of the Minnesota Multiphasic Personality Inventory (MMPI), Beck Depression Inventory (BDI), and 7 visual analog scales (VAS) measuring degree of emotional unpleasantness, pain intensity, anxiety, frustration, fear, anger and depression. Test-retest reliability coefficients were significant for the negative feeling VAS yielding an average reliability coefficient of 0.82. Analyses relating the negative feeling state VAS to pain unpleasantness and depression indices from the MMPI (scale 2) and BDI (sum score) yielded significant canonical correlations. Multiple regression was used to clarify the relationships between negative feeling VAS, pain-related unpleasantness, and indices of depression. After statistically controlling for intensity of pain, anxiety and frustration predicted unpleasantness. Regression analyses indicate that anger is an important concomitant of the depression that pain patients experience. The results suggest that anger and frustration are critical concomitants of the pain experience. Treatment techniques specifically targeting anger and frustration in these patients may prove efficacious.