Table 2.
Comparison of the SaO2 measurements of VSM, smartphone and BGA.
| VSM SaO2 | Smartphone SaO2 | BGA-SaO2 | |
|---|---|---|---|
| Mean ± SD | 92.6 ± 5.65 | 92.72 ± 5.72 | 92.5 ± 5.69 |
| Median (min-max) | 94 (72–99) 94 | (72–99) | 94 (72–100) |
| VSM-BGA SaO2 | Smartphone-BGASaO2 | VSM-Smartphone SaO2 | |
| Regression equation | y = 0.7869 + −0.00748 x | y = −0.3632 + 0.0063x | y = 1.1597 + −0.0139 x |
| Intersection (95% CI) | 0.7869 (−2.5911–4.1649) | −0.3632 (−4.1927–3.4663) | 1.1597 (−3.0247–5.3441) |
| Curve (95% CI) | −0.00748 (−0.0439–0.02896) | 0.0063 (−0.03498–0.04757) | −0.0139 (-0.0589–0.0312) |
| ICC (95% CI) | 0.967 (0.956–0.975) | 0.957 (0.944–0.967) | 0.949 (0.934–0.962) |
| p value for ICC | <0.001 | <0.001 | <0.001 |
SaO2: Oxygen saturation, VSM: Vital signs monitor, SD: standard deviation; ICC: Intra-class correlation coefficient.