Table 2 Agreements of RR and HR between radar and the conventional monitor according to the postures.

From: Preclinical evaluation of noncontact vital signs monitoring using real-time IR-UWB radar and factors affecting its accuracy

 

CCC (95% CI)

ICC (95% CI)

Mean bias (95% CI)

Lower LOA

Upper LOA

Beta, p-values*

Means

RR

all

0.969 (0.951–0.981)

0.970 (0.571–0.992)

0.837 (0.659–1.015)

− 0.42

0.21

− 0.071, < 0.001

Supine

0.970 (0.952–0.981)

0.971 (0.488–0.992)

0.862 (0.694–1.029)

− 0.32

2.04

− 0.045, < 0.001

Sitting

0.958 (0.932–0.975)

0.959 (0.825–0.984)

0.802 (0.524–1.082)

− 1.17

2.77

− 0.105, < 0.001

HR

all

0.845 (0.772–0.897)

0.848 (0.747–0.911)

1.070 (− 0.397–2.537)

-9.30

11.44

− 0.372, < 0.001

Supine

0.819 (0.724–0.883)

0.822 (0.703–0.896)

1.613 (0.022–3.204)

− 9.64

12.86

− 0.338, < 0.001

Sitting

0.751 (0.622–0.841)

0.755 (0.605–0.853)

0.322 (− 1.697–2.341)

− 13.95

12.58

− 0.361, < 0.001

Individual

RR

all

0.923 (0.919–0.926)

0.923 (0.849–0.953)

0.843 (0.801–0.883)

− 2.21

3.90

− 0.067, < 0.001

Supine

0.941 (0.937–0.945)

0.941 (0.826–0.971)

0.882 (0.849–0.914)

− 1.56

3.33

− 0.039, < 0.001

Sitting

0.903 (0.896–0.910)

0.903 (0.848–0.933)

0.800 (0.752–0.849)

− 2.80

4.40

− 0.086, < 0.001

HR

all

0.749 (0.738–0.760)

0.749 (0.731–0.766)

1.129 (0.941–1.316)

− 12.80

15.05

− 0.284, < 0.001

Supine

0.787 (0.774–0.799)

0.787 (0.755–0.814)

1.549 (1.381–1.717)

− 10.88

13.98

− 0.278, < 0.001

Sitting

0.706 (0.688–0.724)

0.707 (0.686–0.726)

0.676 (0.469–0.883)

− 14.64

15.99

− 0.288, < 0.001

  1. RR respiratory rate, HR heart rate, CCC concordance correlation coefficient, LOA limit of agreement.
  2. *Beta coefficients and p-values were derived from a linear regression analysis between the biases and the average between radar and the conventional monitor.
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