. Author manuscript; available in PMC: 2018 Apr 10.

Published in final edited form as: J Surg Res. 2015 Jan 9;195(1):257–262. doi: 10.1016/j.jss.2014.12.051

Table 5.

The effect of examined clinical parameters on the ability to detect SpHb levels and the effect of vasopressor support and mechanical ventilation on the ability to detect SpHb levels.

Parameter	Able to detect SpHb reading?		P value
	Yes	No
	Mean (95% CI)	Mean (95% CI)
Age, y	6.8 (5.5–8.1)	7.7 (5.7–9.7)	0.4462
BMI, kg/m²	16.8 (15.8–17.8)	20.3 (18.7–21.9)	0.0005
Massey	3.2 (2.6–3.7)	3.2 (2.3–4.1)	0.9548
LabHb, g/dL	11.1 (10.7–11.5)	10.6 (9.9–11.3)	0.204
SpO₂, %	97.9 (96.4–99.5)	91.3 (88.8–93.8)	<0.0001
Temperature, C	37 (36.8–37.2)	36.6 (36.4–36.9)	0.0277
Mean BP, mm Hg	87.7 (65.7–109.6)	75.4 (39.9–110.8)	0.5585
PI	3.5 (0.0–7.0)	6.1 (4.0–8.2)	0.21
Vasopressor support, %	21 (25.3)	10 (28.6)	0.8193^*
Mechanical ventilation, %	42 (50.6)	20 (57.1)	0.5504^*
Total number of attempts	83	35

CI = confidence interval.

Fisher exact test.