Figure 3.

Distributions of baseline unaided (gray line) and smartwatch-aided compressions (blue line) are compared for the pooled data of all individual performances in each group. Normalized probability data were analyzed in bins of 0.1 inches (depth) and 2 compressions per minute (rate). Compressions using the smartwatch-based feedback device were performed effectively and with little variability by all groups compared to the wide variability seen during the performance of baseline unaided compressions.