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Table 5 Performance, \(\mu _{P}\) and \(\sigma _{P}\) where P is defined in Eq. 18, for different disturbances for groups of test persons

From: Chest compression rate measurement from smartphone video

Disturbances Short hair/hair up Short + medium hair Short, medium + long hair
Backgr. dist. 85 (4.6) 82 (8.9) 71 (21)
Bad pos. 91 (10) 92 (7.2) 77 (34)
Dist + bas pos. 80 (10) 76 (14) 63 (26)
30:2 + dist. 73 (6.3) 66 (11) 59 (19)
Var. light 97 (1.3) 84 (22) 80 (21)
Other activities 53 (19) 67 (23) 62 (24)
  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. The target rate is 110 cpm, except in the “other activities” test where there is no target compression rate