. 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 6.

Predictors of the inability to detect SpHb reading (results from a logistic regression model).

Parameter	Odds ratio (per unit increase)	Wald 95% confidence limits		Wald chi-square P value
BMI	1.24	1.03	1.49	0.021
SpO₂	0.83	0.70	0.97	0.018
Massey skin score	0.91	0.69	1.21	0.511
Temperature	0.57	0.20	1.63	0.295