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Table 2 Bias and ARMS at different oximetry ranges with the 3 oximeters compared with SaO2

From: Performance of the new SmartCardia wireless, wearable oximeter: a comparison with arterial SaO2 in healthy volunteers

Hemoximeter-Range (%)

60–70

70–80

80–90

90–100

70–100

SaO2 versus SmartCardia

 Mean ± Standard deviation

Range: (Minimum, Maximum)

1.82 ± 0.94

(0.3;3.4)

0.57 ± 1.81

(−2.9; 4.8)

0.17 ± 1.23

(−3.6;3.1)

−0.32 ± 1

(−3.3;1.5)

0.17 ± 1.4

(− 3.6;4.8)

  Count

12

86

91

109

286

  Missing Data

0

0

1

1

2

  Root Mean Square

2.03

1.88

1.23

1.04

1.4

SaO2 versus Masimo

 Mean ± Standard deviation

Range: (Minimum, Maximum)

1.93 ± 3.6

(−7.7;6.4)

2.27 ± 6.55

(−7.8;18.6)

2.68 ± 4.19

(−7.9;13.7)

1.35 ± 2.63

(−5.8;9.5)

2.02 ± 4.6

(− 7.9;18.6)

  Count

12

86

91

109

286

  Missing Data

0

0

0

2

2

  Root Mean Square

2.96

4.9

6.9

3.95

5.00

SaO2 versus Nellcor

 Mean ± Standard deviation

Range: (Minimum, Maximum)

1.51 ± 1.52

(−1.7;3.9)

1.43 ± 2.94

(−3.9;11.1)

1.0 ± 2.1

(−2.0;8.0)

0 ± 1.3

(−4.3;5.5)

0.76 ± 2.19

(−4.3;11.1)

  Count

12

86

91

109

286

  Missing Data

0

9

3

2

14

  Root Mean Square

1.29

2.32

3.26

2.1

2.31

  1. SD standard deviation, CI confidence interval