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 approach

Table 5 Adjusted Associations between joint trajectory groups and adverse birth outcomes stratified by HIV status

Trajectory Group (Ref cat: Normal)	Preterm^a			Low Birthweight^b
Trajectory Group (Ref cat: Normal)	HIV-uninfected ARR (95% CI)^†	HIV-infected ARR (95% CI)^††	P-value	HIV-uninfected ARR (95% CI)^†	HIV-infected ARR (95% CI)^††	P-value
Low Normal	0.48 (0.29–0.81)	0.74 (0.44–1.26)	0.005^† 0.267^††	0.75 (0.46–1.22)	1.37 (0.80–2.33)	0.244^† 0.252^††
High Normal	1.53 (1.08–2.16)	1.40 (0.90–2.19)	0.017^† 0.134^††	1.13 (0.75–1.70)	1.18 (0.70–2.01)	0.549^† 0.531^††
Abnormal	3.42 (2.31–5.05)	2.66 (1.49–4.76)	< 0.0001† 0.001^††	2.01 (1.33–3.02)	1.08 (0.43–2.72)	0.001^† 0.872^††

^aadjusted for age, body mass index and previous preterm delivery
^badjusted for age, body mass index and gestational age at delivery
^†p-value for the association between adverse birth outcome and trajectory group categories among HIV-uninfected women
^††p-value for the association between adverse birth outcome and trajectory group categories among HIV-infected women

ISSN: 1471-2393