Fig. 4
From: Neonatal blood pressure by birth weight, gestational age, and postnatal age: a systematic review

DBP in term babies by postnatal age. Mean BP (mmHg) and 90% reference ranges (1.64SD) for term and post-term infants. Results reported from < 1 h to 1 month postnatal age. Results are sorted in ascending order of PNA. The labels on the vertical axes give the following information: author & year_(subgroup, if applicable)_GA_PNA_method where method is method of BP measurement used (D = doppler, I = intra-arterial, O = oscillometric, C = noninvasive photoplethysmographic cuff, S = Sphygmomanometer)