Purpose: To refine the IADS for assessment of darker-toned skin (IADS-D), validate the IADS-D by comparing its use by wound, ostomy, and continence (WOC) nurses with that of clinical experts, and assess differences in scores by rater skin tone.
Method: Four certified WOC nurses with different skin tones experienced in assessing IAD provided face validity of the IADS-D. Nine photographic cases with and without IAD were developed and organized into two sets of 6 cases, which had 3 cases in common. Two cases had medium (medium/olive/moderate brown) and 4 dark (dark brown/black) skin tone. 261 nurse attendees at 2012 WOCN Society National Conference (96% female, mean(sd) age=53(8) years, WOC experience=12(8) years) used the IADS-D to assess one set of 6 cases randomly distributed. Agreement of IADS-D scores among raters and between raters and experts+investigators was determined using intraclass correlations (ICCs). IADS-D scores were compared by self-reported skin tone of raters using ANOVA: 25% raters had light, 43% fair, 22% medium, 7% olive/moderate brown, and 2% dark brown skin.
Results: Average ICC among WOC nurse raters for each case=77-.99 (all p<.001). Overall ICC between raters and experts for all cases=.92 (p<.001). Average ICC for raters’ vs. experts’ scores for each case=79-.99 (all p<.001). Two cases (normal skin) had near perfect agreement. There was no significant difference in IADS-D scores by raters’ skin tone (p>.05).
Conclusion: The IADS-D had good criterion validity among WOC nurses and was not influenced by rater skin tone.