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Table 4 Adjusted Associations between joint trajectory groups and adverse birth outcomes

From: 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

Trajectory Group

(Ref cat: Normal)

Preterma

Low Birthweightb

RR (95% CI)

ARR (95% CI)

P-value

RR (95% CI)

ARR (95% CI)

P-value

Low Normal

0.67 (0.48–0.94)

0.59 (0.41–0.85)

0.004

0.95 (0.67–1.34)

0.99 (0.70–1.43)

0.998

High Normal

1.43 (1.10–1.85)

1.48 (1.12–1.95)

0.005

1.22 (0.87–1.71)

1.16 (0.83–1.61)

0.390

Abnormal

3.13 (2.35–4.17)

3.18 (2.32–4.37)

< 0.0001

2.81 (1.90–4.15)

1.78 (1.22–2.59)

0.003

  1. aadjusted for age, body mass index and previous preterm delivery
  2. badjusted for age, body mass index and gestational age at delivery