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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