Table 3.
Mean values over a nine-minute period of external chest compression variables for male participants, differentiated for males with higher (n = 15) and lower (n = 15) BMI and HR75 values, respectively.
| Parameter | 15:2 lower BMI |
15:2 higher BMI |
15:2 lower HR75 |
15:2 higher HR75 |
30:2 lower BMI |
30:2 higher BMI |
30:2 lower HR75 |
30:2 higher HR75 |
|---|---|---|---|---|---|---|---|---|
| Compression rate (n/min) | 111 (100/123) | 103 (92/113) | 105 (94/116) | 109 (98/120) | 111 (100/122) | 100 (92/109)* | 101 (91/111) | 111 (101/120) |
| Compression depth (mm) | 37.9 (33/42) | 42 (38/46) | 43.1 (39/47) | 37.3 (33/42)** | 36.9 (31/42) | 41.5 (35/47) | 43.4 (38/48) | 35.1 (30/41)** |
| Correct depth (%) | 26.6 (10/43) | 44 (24/65) | 55.7 (37/74) | 15.4 (4/27)*** | 39.0 (15/63) | 36.1 (14/58) | 50.8 (28/74) | 24.4 (3/45)* |
| Too shallow (%) | 61.6 (40/83) | 34.7 (13/57) | 25.3 (7/43) | 71.0 (51/91)*** | 52.5 (25/80) | 39.6 (14/65) | 26.2 (4/49) | 65.8 (40/91)** |
| Too deep (%) | 11.7 (-5/28) | 27 (5/49) | 25.2 (5/46) | 13.6 (-5/33) | 8.4 (-4/20) | 24.3 (3/45) | 23.0 (3/43) | 9.8 (-5/24) |
| Decompression depth (mm) | 2.0 (1.3/2.7) | 3.0 (1.7/4.3) | 2.9 (1.9/3.9) | 2.1 (1.0/3.2) | 2.2 (1.4/3) | 2.7 (1.8/3.6) | 2.9 (2.0/3.7) | 2.0 (1.2/2.7) |
Data are presented as means (± 95% confidence interval). P-values refer to the comparison between lower vs. higher Body Mass Index (BMI) and lower vs. higher heart rate at 75 watts of rowing (HR75). *: p < 0.1; **: p < 0.05; ***: p < 0.001. For the definition of lower and higher HR75 and BMI please refer to the main text.