Early pregnancy dispositional optimism and pregnancy outcomes among nulliparous people.

Background: Dispositional optimism, the expectation of positive outcomes after personal challenges, is a resilience factor associated with widespread health benefits. However, the data on pregnancy-related outcomes are more limited.

Objective: This study aimed to assess the association of early pregnancy dispositional optimism with adverse perinatal outcomes.

Study Design: This was a prospective cohort study completed between May 2019 and February 2022 at a single, large tertiary medical center. Nulliparous pregnant people were recruited from outpatient obstetrical care sites. Participants completed a validated assessment of dispositional optimism at <20 weeks of gestation and were followed up until delivery. The primary outcome was an adverse maternal outcome composite that included gestational diabetes mellitus, hypertensive disorders of pregnancy, and/or cesarean delivery. The secondary outcomes included individual composite components and a neonatal morbidity composite. Bivariate analyses compared characteristics and primary and secondary outcomes by dispositional optimism score quartile. Multivariable logistic regression compared outcomes by dispositional optimism score quartile with the highest quartile serving as the referent, controlling for confounders determined a priori.

Results: Overall, 491 pregnant people were approached for participation, and 135 pregnant people (27.5%) declined participation. Among the 284 individuals who enrolled and had complete outcome data, the median dispositional optimism score was 16.0 (interquartile range, 14-18), and 47.9% of individuals experienced at least 1 adverse maternal outcome 135 (47.9%). After adjusting for confounders, the odds of adverse maternal outcomes were significantly higher in the lowest 2 optimism quartiles: quartile 1 (adjusted odds ratio, 3.33; 95% confidence interval, 1.57-7.36) and quartile 2 (adjusted odds ratio, 2.22; 95% confidence interval, 1.05-4.79) than the highest quartile. This was driven by significantly higher rates of hypertension (quartile 1: adjusted odds ratio, 2.62; 95% confidence interval, 1.12-6.29) and cesarean delivery (quartile 1: adjusted odds ratio, 2.75; 95% confidence interval, 1.20-6.55). There was no difference noted when quartile 3 was compared with quartile 4.

Conclusion: Lower early pregnancy dispositional optimism was associated with significantly higher odds of adverse maternal outcomes. Interventions targeting improvements in optimism may be a novel mechanism for reducing perinatal morbidity.