Table 1 Sensitivity and specificity of our cough monitoring system in healthy volunteers (n = 11).

From: A novel automatic cough frequency monitoring system combining a triaxial accelerometer and a stretchable strain sensor

Subject no.

Actual number of cough units

Sensitivity (%)

Specificity (%)

PPV (%)

NPV (%)

1

7

86

96

75

98

2

6

100

81

55

100

3

3

100

100

100

100

4

5

100

100

100

100

5

3

100

100

100

100

6

4

100

100

100

100

7

3

100

67

75

100

8

5

100

100

100

100

9

5

80

100

100

97

10

2

100

91

50

100

11

5

80

98

80

98

Total

48

94

95

80

99

  1. All healthy volunteers were asked to cough voluntarily.
  2. NPV negative predictive value, PPV positive predictive value.