Fig. 1From: Do task and item difficulty affect overestimation of one’s hand hygiene compliance? A cross-sectional survey of physicians and nurses in surgical clinics of six hospitals in GermanyDifferences between self-reported and observed WHO-5-specific hand hygiene compliance rates by level of observed compliance$. Notes: $For more details, see Table 2. *Pearson correlation coefficient (overall r = −0.87, p = 0.001)Back to article page