Figure 3.

Current and cumulative users (1999–2002) by race/ethnicity. The definition of current users (calculated as a percentage) is the number of subjects who have used any e-Health service in each quarter divided by the total number of subjects in the quarter (lower curves of current users: whites [diamonds] and nonwhites [circles]). The definition of cumulative use (calculated as a percentage) is the number of subjects who have ever used e-Health services during the study divided by the total number of subjects in the quarter (upper curves of cumulative user: whites [squares] and nonwhites [triangles]).