Abstract
The purpose of this study was to test validity and reliability of the Preoperative Cognitive Appraisal Scale (POCAS). This study was based on the theory of appraisal, stress and coping of Lazarus & Folkman. Responses to the initial POCAS were obtained from sample of 203 preoperative in-patients with laparotomy or thoracotomy. The age of subjects ranged from 23 to 83 years. The reconstructed POCAS was composed of four factors and 29 items. Construct validity was tested through factor analysis and based on the theoretical estimate. Reliability was calculated using Cronbach's alpha coefficient to measure internal consistency. Factor 1 was demonstrated to be positive emotion of a good opportunity and toward a good life following this event. Factor 2 was demonstrated to be optimistic and self-defense emotion that relies on medical treatment or comparison with other patients. Factor 3 was demonstrated to be emotions toward to prepared coping. Factor 4 was demonstrated to be emotions of depression and threat. Factor 1, factor 2, and factor 4 could be explained in terms of primary appraisal, while factor 3 was understood as secondary appraisal. Consequently, the reconstructed POCAS nearly matches Lazarus's theory. Cronbach's alpha coefficient was. 86 for the whole of the POCAS and ranged from. 81 to. 85 for the subscales. This indicates a high reliability of the scale. Validity and reliability of the POCAS were supported. The results suggest that the POCAS may be used as part of assessment of psychological stress in preoperative in-patients.
