<p>Dataset with information analyzed.</p>

There was no preterm delivery documented in this sample. The primary exposure was 6-month isoniazid preventive therapy (IPT) during pregnancy. We applied inverse probability of treatment weighting (IPTW) using propensity scores from logistic regression to adjust for confounding.

Missing data on covariates and outcome were addressed using multiple imputation. Analysis was performed using R software v.4.3.3. We analyzed data from 521 pregnant WLHIV, the median age was 28 years (interquartile range 24–31), 44% of whom received IPT during pregnancy.

Overall, 10.0% experienced an adverse pregnancy outcome. No significant differences were observed between IPT-exposed and unexposed groups for the primary (10.3% vs. 9.6%; p = 0.81) or secondary (10.3% vs. 8.5%; p = 0.50) composite outcomes. IPTW-adjusted analysis showed no significant association between IPT exposure and adverse pregnancy outcomes (weighted OR: 1.06; 95% CI: 0.68–1.63; p = 0.81).

Sensitivity and subgroup analyses yielded consistent findings. Exposure to 6-month isoniazid TPT during pregnancy was not statistically associated with adverse pregnancy outcomes among women on ART in routine care settings. Strengthened pharmacovigilance and systematic clinical reporting are essential to ensure maternal and neonatal safety as TPT coverage expands in high TB/HIV burden settings.</p></div>