Cardiovascular

Early outcomes after venous thromboembolism in Hispanic and non-Hispanic patients: insights from the Registro Informatizado de Enfermedad TromboEmbólica Registry.

TL;DR

Self-identified Hispanic ethnicity was associated with modestly higher adjusted odds of recurrent VTE and major bleeding, but not mortality, though absolute differences were small.

Key Findings

Hispanic ethnicity was associated with increased odds of recurrent VTE at 90 days compared to non-Hispanic patients.

  • Recurrent VTE occurred in 1.6% of Hispanic patients and 1.2% of non-Hispanic patients (absolute difference, 0.4 percentage points).
  • In fully adjusted models, OR for recurrent VTE was 1.90 (95% CI, 1.10–3.28).
  • Analysis used hierarchical logistic regression in a 1:3 exposure-matched cohort of 1792 Hispanic and 5376 non-Hispanic patients.
  • Matching variables included age, sex, index VTE phenotype, active cancer, and calendar period.

Hispanic ethnicity was associated with increased odds of major bleeding at 90 days.

  • Major bleeding occurred in 2.1% of Hispanic patients and 1.7% of non-Hispanic patients (absolute difference, 0.4 percentage points).
  • In fully adjusted models, OR for major bleeding was 1.73 (95% CI, 1.09–2.75).
  • The association remained statistically significant after adjustment for potential confounders.

Hispanic ethnicity was associated with increased odds of the composite outcome (recurrent VTE or major bleeding) at 90 days.

  • The composite outcome occurred in 3.4% of Hispanic patients and 2.9% of non-Hispanic patients (absolute difference, 0.5 percentage points).
  • In fully adjusted models, OR for the composite outcome was 1.77 (95% CI, 1.23–2.54).
  • This was the strongest statistically significant association in terms of confidence interval width among the primary outcomes.

Hispanic ethnicity was not associated with increased odds of all-cause mortality at 90 days.

  • Mortality occurred in 4.1% of Hispanic patients and 3.9% of non-Hispanic patients (absolute difference, 0.2 percentage points).
  • In fully adjusted models, OR for mortality was 1.05 (95% CI, 0.68–1.64), which was not statistically significant.
  • Mortality was the most frequent outcome in both groups despite not differing between them.

The matched cohort was predominantly female and middle-aged, drawn from the RIETE international registry.

  • The matched cohort included 1792 Hispanic and 5376 non-Hispanic patients matched 1:3.
  • Mean age was 57 ± 18 years and 59% were women.
  • RIETE is a prospective, international cohort registry of adults with acute VTE.
  • Exposure was defined as self-identified Hispanic ethnicity.

The authors cautioned that observational associations should not be interpreted as causal due to the possibility of residual confounding.

  • The study design was an exposure-matched observational registry analysis.
  • Residual confounding cannot be excluded as a limitation.
  • Absolute differences between Hispanic and non-Hispanic patients were described as 'small' despite statistically significant adjusted relative estimates.
  • The authors noted that Hispanic patients remain underrepresented in VTE cohorts, motivating the study.

What This Means

This research suggests that Hispanic patients diagnosed with a blood clot (venous thromboembolism, or VTE) may face modestly higher risks of having another clot or experiencing a serious bleeding event within 90 days compared to non-Hispanic patients, even after accounting for differences in age, sex, cancer status, and other factors. The study used data from a large international registry and carefully matched over 1,700 Hispanic patients to more than 5,000 non-Hispanic patients for comparison. The adjusted odds of recurrent clotting were about 90% higher and the odds of major bleeding were about 73% higher for Hispanic patients, though the actual percentage-point differences between groups were quite small (less than 0.5 percentage points for each outcome). Importantly, there was no statistically significant difference in the risk of dying within 90 days between Hispanic and non-Hispanic patients. The authors emphasize that while the relative risk estimates (odds ratios) were notably elevated, the absolute differences in outcomes between the two groups were small, meaning the overall number of additional events attributable to ethnicity was limited. The authors also caution that because this was an observational study, unmeasured factors could explain some or all of the differences observed. This research matters because Hispanic patients have historically been underrepresented in VTE studies, leaving gaps in understanding how this disease affects them. These findings highlight the need for further investigation into whether differences in treatment patterns, access to care, comorbidities, or biological factors contribute to these outcome disparities, and whether targeted follow-up or management strategies might benefit Hispanic patients with VTE.

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Citation

Cabrera L, Tafur A, Guirado-Torrecillas L, Pedrajas J, Moustafa F, Falgá C, et al.. (2026). Early outcomes after venous thromboembolism in Hispanic and non-Hispanic patients: insights from the Registro Informatizado de Enfermedad TromboEmbólica Registry.. Research and practice in thrombosis and haemostasis. https://doi.org/10.1016/j.rpth.2026.106969