Abstract
Abstract Purpose. The purpose of the study was to identify the relationship between plasma β-endorphin (objective variable) and the dimensions of the Chinese Cancer Pain Assessment Tool (CCPAT) (subjective variables). The dimensions included functional, pharmacological, psychosocial, pain beliefs and meanings, emotional and pain intensity. Methods. In this correlational study, 48 Chinese patients who had experienced cancer pain in the 24 hours before the investigation were recruited from an oncology unit by convenience. CCPAT scores and venous blood for β-endorphin were taken from each subject concurrently on two occasions, 8 a.m. and 8 p.m. Plasma β-endorphin was measured by radioimmunoassay. Results. Thirty-eight men and nine women were recruited. With the exception of 14 subjects who did not have the blood-taking procedure in the evening, all subjects completed the CCPAT and their blood was taken. Nineteen subjects suffered from gastrointestinal cancers, 17 from nasopharyngeal carcinoma, 9 from lung ca...
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