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Table 2 Main results

From: Influence of physical strain at high altitude on the quality of cardiopulmonary resuscitation

 BaselineHigh altitudeDifference (with 95% CI)p-value
Compression depth (cm, mean, SD)5.4 (1.6)4.3 (0.9)−1.0 (−1.3 to −0.5)< 0.001
Compression frequency (pm, mean, SD)120 (37)123 (11)3 (−4 to 10)0.36
Compressions in target depth (%, mean, SD)72 (31)17 (34)−55 (−82 to −29)< 0.001
Hands-off time (s, mean, SD)201 (63)189 (20)−13 (−27 to 2)0.09
Duration of release phase (ms, mean, SD)414 (132)339 (82)−75 (−101 to − 48)< 0.001
Proportion of time performing chest compressions (%, mean, SD)79 (23)80 (2)1 (− 6 to 3)0.20