Figure 3From: The correlation and level of agreement between end-tidal and blood gas pCO2in children with respiratory distress: a retrospective analysis Regression of EtCO 2 and vpCO 2 Values with Line of Unity. The equation for the regression line is EtCO2 = .832904(vpCO2) + 2.905448, r2 = 0.8161.Back to article page