Aim: ABCD-Stoma^® was developed for the assessment of the severity of peristomal skin disorders（PSDs）. We determined clinical applications of ABCD-Stoma^® by assessing its reliability and validity.
　Methods: To assess reliability, raters who participated in a symposium of the Japanese Society of Wound, Ostomy, and Continence Management were shown 10 PSD images, two of which were identical. On the basis of the ratings, we calculated the interrater reliability using the intraclass correlation coefficient（for region A, B, C, and the total score）and the kappa coefficient（for D）, and calculated the intrarater reliability according to the concordance ratio. To assess predictive validity, we evaluated 58 collaborating facilities for ostomates with PSDs and conducted receiver operating characteristic（ROC）analysis.
　Results: A total of 528 individuals rated ABCD-Stoma^® reliability. Validity was assessed in 382 ostomates with PSD. Interrater reliability was 0.898 for A, 0.871 for B, 0.834 for C, 0.371 for D, and 0.802 for total score. Intrarater reliability for regions A, B, C, and D was 0.802-1.000. Area under the ROC curve for prediction of healing by total points based on cutoff values of the total score was 0.714 for PSD healing within 28 days and 0.823 for PSD healing within 29-56 days.
　Conclusion: ABCD-Stoma^® scores can provide a common understanding of PSD and could be used to predict PSD resolution.

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　For pressure injury management, making treatment decisions in value-based medicine is an important part of patient-centered care for improving quality of life（QOL）. However, few studies have evaluated QOL of patients with pressure injuries. Previous studies of QOL on nonresponsive patients have indicated excellent reliability and validity between patient self-reports and primary caregiver reports.
　This study aimed to examine the QOL of patients with pressure injury in Japan using the EQ-5D-5L as well as assess the reliability and validity of evaluation values obtained by proxy answers from nursing staff. Assessments were made on 151 patients（68.8±16.4 years）and 34 nurses from 16 facilities. The utility value and visual analog scale were 0.41±0.24 and 50.4±23.1, respectively. The concurrent validity between utility values and the Freiburg Life Quality Assessment wound module, a measure for chronic wounds, was r_s = -0.62. When comparing patients’ answers with those of nurse proxies, the intraclass correlation coefficients for the utility value and visual analog scale were 0.70（P < 0.01）and 0.54（P < 0.01）, respectively. The utility value tended to decrease as the pressure injury became deeper（P = 0.04）. When completed by nurses, the Japanese version of EuroQol provided reliable and valid proxy ratings of QOL for patients with pressure injuries, suggesting clinical relevance.

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