Addressing the Smoking-Hypertension Paradox in Pregnancy: Insight from a Multiethnic US Birth Cohort

Background

Smoking during pregnancy has been associated with reduced risk of a spectrum of hypertensive (HTN) disorders, known as the "smoking-hypertension paradox."

Objective

We sought to test potential epidemiologic explanations for the smoking-hypertension paradox.

Methods

We analyzed 8,510 pregnant people in the Boston Birth Cohort, including 4,027 non-Hispanic Black and 2,428 Hispanic pregnancies. Study participants self-reported tobacco, alcohol, cannabis, opioids, or cocaine use during pregnancy. We used logistic regression to assess effect modification by race/ethnicity, and confounding of concurrent substances on hypertensive disorders or prior pregnancy. We also investigated early gestational age as a collider or competing risk for pre-eclampsia, using cause-specific Cox models and Fine-Gray models, respectively.

Results

We replicated the paradox showing smoking to be protective against hypertensive disorders among Black participants who used other substances as well (aOR: 0.61, 95% CI: 0.41, 0.93), but observed null effects for Hispanic participants (aOR: 1.14, 95% CI: 0.55, 2.36). In our cause-specific Cox regression, the effects of tobacco use were reduced to null effects with pre-eclampsia (aOR: 0.81, 95% CI: 0.63, 1.04) after stratifying for preterm birth. For the Fine-Gray competing risk analysis, the paradoxical associations remained. The smoking paradox was either not observed or reversed after accounting for race/ethnicity, other substance use, and collider-stratification due to preterm birth.

Conclusions

These findings offer new insights into this paradox and underscore the importance of considering multiple sources of bias in assessing the smoking-hypertension association in pregnancy.

Suicidal ideation among Nepali widows: an exploratory study of risk factors and comorbid psychosocial problems

PURPOSE

Suicide is a leading cause of death among Nepali women of reproductive age. Suicidal ideation has known associations with stressful life events, which Nepali widows disproportionately experience. We aimed to identify risk and protective factors that could lead to effective interventions for this population.

METHODS

To study suicidal ideation in Nepali widows, we collected data from 204 women in urban, semi-urban, and rural areas whose husbands died at least one year prior. The questionnaire included sociodemographic information, the Hopkins Symptom Checklist-25, PTSD Checklist-Civilian Version, Somatic Symptom Scale-8, and the Multidimensional Scale of Perceived Social Support. Overall severity of prolonged grief was assessed by a counselor after completing a structured clinical interview. Using multivariate regression models, we assessed associations of sociodemographic and psychosocial indicators with past-year suicidal ideation. Latent profile analysis was also performed to estimate profiles of comorbidities.

RESULTS

Past-year suicidality was high, with 16.2% (N = 33). Each year increase since husband's death was protective and reduced odds of ideation 8% (95% CI 0.85-0.98) and being educated and of older age also reduced the odds of ideation by 0.21 (95% CI 0.06-0.70), and 0.09 (95% CI 0.01-0.64), respectively. Depression (OR = 6.37, 95% CI 2.78-14.59), PTSD (OR = 3.84, 95% CI 2.15-6.86), prolonged grief (OR = 6.04, 95% CI 3.04-12.00) and anxiety (OR = 6.52, 95% CI 2.96-14.38) were highly associated with suicidality, and mapped onto the three profiles of increasing mental distress severity.

CONCLUSION

Suicide remains a major issue among Nepali widows, showing high comorbidity with other mental disorders. Screening for depression, anxiety, and prolonged grief, may aid in identifying widows at increased risk of suicidal ideation.