Fig. 1From: Blood pressure trajectories during pregnancy and associations with adverse birth outcomes among HIV-infected and HIV-uninfected women in South Africa: a group-based trajectory modelling approachJoint trajectory group combinations: Five systolic (a) and five diastolic (b) blood pressure joint trajectory group combinations were grouped and classified according to longitudinal trend and mean start BP; into four joint groups: consistent normal systolic and diastolic BP, consistent low normal systolic and diastolic BP, consistent high normal systolic and diastolic BP, and increasing abnormal systolic and/or diastolic BPBack to article page