Newfound compassion after prostate cancer: a psychometric evaluation of additional items in the Posttraumatic Growth Inventory

作者：Morris Bronwyn A^*; Wilson Bridget; Chambers Suzanne K

来源：Supportive Care in Cancer, 2013, 21(12): 3371-3378.

DOI：10.1007/s00520-013-1903-7

• Posttraumatic Growth Inventory
• Posttraumatic growth
• Prostate cancer
• Compassion
• Psychometric

The most widely used measure of posttraumatic growth (PTG) is the Posttraumatic Growth Inventory (PTGI). Qualitative research indicates the importance of increased compassion as a result of struggling with challenges presented by cancer and treatments. However, current PTG measures may not adequately assess compassion. %26lt;br%26gt;A cross-sectional survey of 514 prostate cancer survivors assessed the PTGI and Dispositional Positive Emotional Scale (DPES). Five additional PTG items were derived from previous qualitative research to assess increased compassion. %26lt;br%26gt;After removing eight items with complex loadings, a principal components analysis with oblimin rotation revealed a six-component structure. A clear delineation was seen between components relating to compassion, new possibilities, relating to others, personal strength, appreciation of life and spiritual change. Compassion accounted for 48.9 % of variance in data, with the overall model accounting for 79.9 % of variance. Strong factorability was demonstrated through Kaiser-Meyer-Olkin (0.92) and Bartlett%26apos;s test of sphericity (approximate chi (2) = 5,791.85, df 153, p %26lt; 0.001). The six-component structure was validated with a confirmatory factor analysis. Strong internal consistency was evidenced through Cronbach%26apos;s alpha coefficients ranging from 0.74 to 0.90 for subscales, and item-to-total correlations and inter-item correlations exceeded accepted thresholds of 0.50 and 0.30, respectively. Convergent validity was acceptable between the PTGI compassion subscale and DPES (r = 0.50). %26lt;br%26gt;Compassion is a highly salient PTG domain after prostate cancer. Further studies can explore this construct with more heterogeneous samples of cancer types and gender.

• 出版日期2013-12