Convergent Validity of Three Pressure Injury Risk Assessment Scales: Comparing the PPRA-Home (Pressure Injury Primary Risk Assessment Scale for Home Care) to Two Traditional Scales

The Pressure Injury Primary Risk Assessment Scale for Home Care (PPRA-Home) was developed to predict pressure injury risk in geriatric individuals requiring long-term care in home settings. This study aimed to compare the convergent validity of the PPRA-Home to that of the two other standardized pressure injury prevention scales: the Braden and Ohura-Hotta (OH) scales. A multicenter, cross-sectional study was conducted with 34 home-based geriatric support service providers located in five Japanese districts. The study included 69 participants (30 had a pressure injury and 39 did not) who were at classified at care levels of 1 through 5 under Japan's long-term care insurance system. Care managers served as assessors for the PPRA-Home, while physicians or certified expert nurses served as assessors for the Braden and OH scales. Convergent validity was investigated by examining correlation coefficients between total scores on the PPRA-Home and the other two scales. Receiver operating curve analysis was used to quantify each scale's accuracy for the two groups: those with and without a pressure injury. The PPRA-Home was found to be negatively correlated with the Braden scale (r=-0.79, p