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Pulse oximetry oxyhemoglobin saturation (SpO2) as a function of dyshemoglobinemia (COHb + MetHb). The regression equation was y = 100.87-1.24x. The y-intercept (p<0.0001) and the slope (p=0.003) were statistically significant. There was a negative correlation between the independent and dependent variables (R2 = 0.17).
