Table 2.
Results of subgroup and sensitivity analyses for chest compression depth
| No. of studies | No. of participants | Heterogeneity | Pooled mean difference (95% CI) | Significance | Test for subgroup difference | |
|---|---|---|---|---|---|---|
| Type of participants | P = 0.67 | |||||
| Layperson | 5 | 529 | I2 = 92% | -0.95 [-7.66, 5.75] | P = 0.78 | |
| Medical students | 1 | 40 | - | 0.80 [-3.67, 5.27] | P = 0.73 | |
| VR or AR used in the intervention group | P = 0.95 | |||||
| VR | 4 | 482 | I2 = 94% | -0.39 [-7.97, 7.19] | P = 0.92 | |
| AR | 2 | 87 | I2 = 45% | -0.73 [-6.74, 5.28] | P = 0.81 | |
| Manikin used during VR/AR-guided practice | P = 0.83 | |||||
| Yes | 3 | 113 | I2 = 8% | -0.97 [-4.38, 2.44] | P = 0.58 | |
| No | 3 | 456 | I2 = 96% | 0.21 [-9.73, 10.15] | P = 0.97 | |
| Sensitivity analysis | - | |||||
| Overall low risk of bias | 3 | 405 | I2 = 87% | -3.06 [-9.25, 3.13] | P = 0.33 | |
| Data reported as mean and standard deviation | 5 | 509 | I2 = 93% | 0.00 [-6.41, 6.41] | P = 1.00 |