Table 2.
Year‐to‐Year Chest CC of all AHA Quality Metrics
| Total | 2013 | 2014 | 2015 | P Value | |
|---|---|---|---|---|---|
| CC quality measures | |||||
| CC events (n) | 105 | 11 | 40 | 54 | |
| All CC epochs (n) | 2135 | 152 | 922 | 1061 | |
| Event average CC metrics—median, IQR | |||||
| CC Rate (per min) | 114 (108–120) | 114 (106–125) | 116 (113–128) | 110 (107–115) | <0.001a |
| CC depth (cm): aged ≤1 y | 4.2 (3.3–4.7) | 2.2 (2.2–2.2) | 4.4 (2.8–4.8) | 4.0 (3.6–4.7) | 0.35 |
| CC depth (cm): aged >1 y | 5.4 (4.4–6.0) | 5.9 (4.2–6.6) | 5.4 (4.6–6.0) | 5.3 (4.2–5.8) | 0.43 |
| CCF | 0.93 (0.85–0.96) | 0.91 (0.76–0.97) | 0.94 (0.88–0.98) | 0.93 (0.84–0.95) | 0.19 |
| Cumulative epoch cc metricsb | |||||
| Rate compliant: n (%) | 1130 (69%) | 30.2 (10.8, 49.7) | 63.4 (52.8, 74.1) | 78.8 (72.4, 85.2) | <0.001a |
| Depth compliant: n (%) | 1349 (63%) | 55.2 (23.7, 86.7) | 67.1 (55.6, 78.7) | 60.9 (50.3, 71.5) | 0.65 |
| CCF compliant: n (%) | 1718 (81%) | 66.2 (50.8, 81.6) | 83.0 (75.2, 90.9) | 79.8 (75.4, 84.2) | 0.13 |
| Rate+depth+CCF compliant: n (%) | 884 (41%) | 19.9 (6.9, 32.9) | 41.8 (30.5, 53.0) | 44.3 (35.3, 53.3) | 0.04a |
AHA indicates American Heart Association; CC, chest compression; CCF, chest compression fraction; IQR, interquartile range.
a
Indicates statistical significance at P<0.05.
b
Marginal probabilities with 95% confidence interval from logistic regression models adjusting for age and weight.