Figure 4. Subgroup Analyses for Chest Compression Depth and Rate.

Forest plot on prespecified subgroup analyses based on sex, age, weight, education, health care professional, previous cardiopulmonary resuscitation (CPR) training (within 2 years), alcohol level, and drug/substance use. Mean differences in compression depth (A) (millimeters) and compression rate (B) (compressions minute⁻¹) between virtual reality (VR) and face-to-face training, with 95% confidence intervals. The P value for interaction is for testing whether the effect of the intervention on compression depth and rate differs between the subgroups.