The reliability of two observation methods of nonblanchable erythema, Grade 1 pressure ulcer.

Accurate identification of nonblanchable erythema (NBE) is essential in pressure ulcer prevention. This descriptive study assessed interrater reliability between a researcher and trained nurses in observing blanchable erythema and NBE and examined the predictive validity and level of agreement between two observation methods for NBE. Findings suggest that the transparent disk method should be preferred to the finger method. The interrater reliability between the researcher and the nurses was substantial and was higher for the observations at the sacrum than for those at the heels. Educational level and years of nursing experience did not seem to influence interrater reliability.