Marginal means for postural effects on cerebral oxygenation.

This figure demonstrates the direction of effects for cerebrovascular stability in each group. rcSO₂ values are least square means estimated from the generalized estimating equation that tested our a priori hypotheses and are adjusted for postconceptional age, sex, ethnicity, and SpO₂. Brain oxygen saturation decreased from the supine to sitting posture in CHD infants, but it increased slightly in healthy controls. Error bars represent standard error. CHD = congenital heart disease; rcSO₂ = regional cerebral oxygen saturation.