Figure 4From: Physicians' Perceptions on the usefulness of contextual information for prioritizing and presenting alerts in computerized physician order entry systems Dendrogram of the clustered context factors. This tree diagram is read from left to right; every factor is one cluster at the beginning. Similar clusters are linked step-wise (vertical lines). Distances are transformed into the range from 0 to 25 preserving the original ratios. The longer the horizontal lines and leaps become, the bigger the dissimilarity becomes, which is where to stop the agglomeration.Back to article page