Abstract
Objective: The reliability, validity, and responsiveness of the Japanese version of the Critical-Care Pain Observation Tool (CPOT-J) were examined. Methods: A total of 27 postoperative cardiovascular patients in the ICU were assessed by the researcher and 16 clinical nurses with ≥1 year of ICU experience. Agreement between nurse and researcher scores was used to determine inter-rater reliability. Correlations between the CPOT-J and the Richmond Agitation-Sedation Scale (RASS), vital signs, and numeric rating scale (NRS) were examined to determine validity. CPOT-J scores before, just after, and 20 min after painful stimulation were used to assess responsiveness. Results: Inter-rater reliability was high (κ=0.803). Weak correlations were seen between the CPOT-J and each of RASS, sBP, dBP, HR (r=0.260, r=0.343, r=0.337, and r=0.302, respectively). Respiratory rate and NRS showed moderate correlations with the CPOT-J (r=0.601 and r=0.652, respectively). CPOT-J were found to be significantly increased just after stimulation. Conclusion: Although discriminant validity with agitation was unable to be determined, criterion-related and convergent validities were acceptable. The CPOT-J offers a highly reliable measurement tool for evaluating the degree of and changes in pain among ICU patients.
