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Table 2 Average error [cpm], \(\mu _{\bar{E}}\) with \(\sigma _{\bar{E}}\) in parentheses, for the different target rates and CPR 30:2 for groups of test persons

From: Chest compression rate measurement from smartphone video

Test Short hair/topknot Short + med. hair All test persons Long loose hair
60 cpm 3.9 (1.77) 4.6 (1.6) 10.0 (11.0) 13.5 (3.1)
110 cpm 3.6 (0.77) 6.8 (5.9) 8.7 (6.0) 23.5 (14.1)
CPR 30:2 3.9 (1.55) 13.4 (13.5) 18.6 (19.6) 31.5 (33.4)