Table 1.
CPR variables (compressions and ventilations).
| At port | At 10 knots | At 20 knots | At port versus 10 knots | At port versus 20 knots | 10 knots versus 20 knots | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Mean (DE) | 95% IC | Mean (DE) | 95% IC | Mean (DE) | 95% IC | p value | ES | Rating | p value | ES | Rating | p value | ES | Rating | |
| Compressions | |||||||||||||||
| TCC∗ | 158 (15) | 151–165 | 167 (18) | 159–176 | 171 (18) | 163–180 | 0.01 | 1.04 | Large | 0.002 | 1.26 | Large | 0.09 | 0.74 | Medium |
| D∗∗ | 56 (5) | 54–58 | 60 (6) | 57–63 | 59 (7) | 56–62 | <0.001 | 0.69 | Large | 0.003 | 0.65 | Large | 0.06 | 0.30 | Medium |
| R∗∗ | 115 (16) | 108–123 | 119 (11) | 114–124 | 115 (27) | 102–128 | 0.11 | 0.44 | Medium | 0.11 | 0.40 | Medium | 0.11 | 0.26 | Small |
| Ventilations | |||||||||||||||
| V∗ | 11 (2) | 10-11 | 10 (2) | 10-11 | 10 (1) | 10-11 | 1.00 | 0.14 | Small | 0.56 | 0.43 | Small | 1.00 | 0.26 | Small |
| TVI∗∗ | 4939 (1927) | 4038–5841 | 5088 (3211) | 3585–6591 | 5233 (4066) | 3330–7136 | 0.66 | 0.06 | Trivial | 0.49 | 0.08 | Trivial | 0.64 | 0.04 | Trivial |
| MTV∗∗ | 542 (81) | 457–627 | 601 (267) | 476–726 | 571 (405) | 381–760 | 0.25 | 0.22 | Small | 0.82 | 0.15 | Small | 0.64 | 0.10 | Small |
∗Bonferroni test. ∗∗Friedman test. TCC: total number of chest compressions (during two minutes). D: depth of chest compression (mm). R: chest compressions rate (per minute). V: ventilations (during two minutes). TVI: total volume inflated (ml during two minutes). MTV: mean tidal volume (ml per ventilation).