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Table 2 Estimated DTA measures (95% CI) of the key indicator symptom combinations Unconscious, alone and with any one or more symptoms: Not Breathing, Ineffective Breathing or Noisy Breathing

From: Predictors of recognition of out of hospital cardiac arrest by emergency medical services call handlers in England: a mixed methods diagnostic accuracy study

 

Sensitivity

Specificity

PPV

NPV

Unconscious

86.0 (80.2–90.5)

93.4 (89.0–96.2)

14.0 (8.9–22.7)

99.8 (99.7–99.9)

Unconscious and (A) Noisy Breathing

23.6 (17.8–30.4)

98.8 (96.1–99.9)

19.3 (6.7–67.2)

99.0 (98.9–99.2)

Unconscious and (B) Ineffective Breathing

51.7 (44.3–58.9)

97.4 (94.1–99.0)

20.0 (9.7–40.2)

99.4 (99.3–99.5)

Unconscious and (C) Not Breathing

53.4 (45.8–60.5)

98.6 (95.9–99.7)

33.0 (13.4–71.6)

99.4 (99.3–99.5)

Unconscious and at least one of

(B) Ineffective Breathing or (C) Not breathing

78.1 (71.4–83.8)

96.2 (92.8–98.2)

20.5 (11.6–35.4)

99.7 (99.6–99.8)

Unconscious and at least one of (A) Noisy Breathing,

(B) Ineffective Breathing or (C) Not Breathing

79.8 (73.5–85.3)

95.7 (92.1–97.8)

18.7 (11.0–32.0)

99.7 (99.6–99.8)