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Table 3 Performance, \(\mu _{P}\) and \(\sigma _{P}\) where P is defined in Eq. 18, 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 87 (11) 86 (9.1) 68 (33) 25.1 (33.5)
110 cpm 94 (2.8) 87 (13) 86 (11) 81.7 (2.1)
CPR 30:2 87 (3.4) 74 (19) 69 (24) 55.6 (38.3)
  1. P gives the % of time throughout the test where the detected rate is within a ±10 cpm limit compared to the recorded true compression rate