Table 3.
HQ-CPR Outcomes in the Four Study Conditions Reported as Average (SD) and Differences between Study Conditions Reported in Mean Difference (95% CI)
| HQ-CPR Outcomes in the Four Study Conditions | ||||
|---|---|---|---|---|
| Manual Stable Average (Standard Deviation) |
Manual Dynamic Average (Standard Deviation) |
|||
| Depth % | 95.7 | (15.43) | 93.3 | (24.73) |
| Full Recoil % | 71.8 | (26.96) | 57.5 | (30.00) |
| Rate % | 62.7 | (46.25) | 48.7 | (41.14) |
| Compression Fraction % | 100.0 | (0.00) | 100.0 | (0.00) |
| Hand Positioning % | 93.5 | (17.31) | 91.2 | (19.18) |
| Composite HQ-CPR Score | 80.9 | (17.51) | 72.7 | (20.22) |
| Average Depth (mm) | 61.3 | (4.08) | 60.1 | (6.98) |
| Average Rate (Compressions/Second) | 119.2 | (12.66) | 119.3 | (13.13) |
| Duty Cycle | 39.5 | (5.87) | 39.4 | (5.49) |
|
Mechanical Stable
Average (Standard Deviation) |
Mechanical Dynamic
Average (Standard Deviation) |
|||
| Depth % | 99.2 | (1.26) | 99.3 | (1.22) |
| Full Recoil % | 99.7 | (1.05) | 99.8 | (0.56) |
| Rate % | 100.0 | (0.00) | 100.0 | (0.00) |
| Compression Fraction % | 100.0 | (0.00) | 100.0 | (0.00) |
| Hand Positioning % | 100.0 | (0.00) | 100.0 | (0.00) |
| Composite HQ-CPR Score | 99.7 | (0.36) | 99.8 | (0.31) |
| Average Depth (mm) | 54.3 | (1.40) | 54.5 | (0.92) |
| Average Rate (Compressions/Minute) | 111.0 | (0.00) | 111.0 | (0.00) |
| Duty Cycle | 53.1 | (2.02) | 52.9 | (0.96) |
| Differences in HQ-CPR Outcomes Between the Four Study Conditions | ||||
|
Manual Stable
vs Manual Dynamic Difference (95% CI) |
Mechanical Stable
vs Mechanical Dynamic Difference (95% CI) |
Manual Stable
vs Mechanical Stable Difference (95% CI) |
Manual Dynamic
vs Mechanical Dynamic Difference (95% CI) |
|
| Depth % | −2.4 (−7.6 – 2.8) P = .33 |
−0.07 (−1.0 – 0.9) P = .88 |
3.5 (−4.6 – 11.7) P = .39 |
6.00 (−7.1 – 19.1) P = .36 |
| Full Recoil % | −14.3 (−31.1 – 2.5) P = .09 |
−0.1 (−0.8 – 0.5) P = .67 |
27.9 (13.6 – 42.1)
P = .001 |
42.3 (26.7 – 58.2)
P <.001 |
| Rate % | −11.1 (−26.2 – 3.9) P = .14 |
– |
40.2 (17.1 – 63.3)
P = .003 |
51.33 (29.6 – 73.1)
P <.001 |
| Compression Fraction % | – | – | – | – |
| Hand Positioning % | −2.3 (−5.7 – 1.2) P = .18 |
– | 6.5 (−2.6 – 15.7) P = .17 |
8.8 (−1.3 – 18.9) P = .10 |
| Composite HQ-CPR Score % |
-7.5 (−14.7 – −0.3)
P = .04 |
−0.05 (−0.3 – 0.23) P = .69 |
19.5 (10.6 – 28.5)
P < .001 |
27.1 (16.4 – 37.8)
P <.001 |
| Average Depth (mm) | −1.1 (−31 – 0.8) P = .23 |
−0.2 (−1.1 – 0.7) P = .65 |
6.9 (4.7 – 9.2)
P <.001 |
5.9 (1.9 – 9.3)
P = .008 |
| Average Rate (Compressions/Minute) | 0.07 (−4.9 – 5.0) P = .98 |
– |
8.2 (1.5 – 14.6)
P = .025 |
8.3 (1.3 – 15.2)
P = .029 |
| Duty Cycle | −0.07 (−1.4 – 1.2) P = .92 |
0.13 (−1.0 – 1.3) P = .96 |
13.6 (10.3 – 16.9)
P <.001 |
13.5 (10.6 – 16.5)
P <.001 |
Abbreviation: HQ-CPR, high-quality cardiopulmonary resuscitation.