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  • Title: Is there an effect of race/ethnicity on early complications of iliac vein stenting?
    Author: Alsheekh A, Hingorani A, Ferm S, Kibrik P, Aurshina A, Marks N, Ascher E.
    Journal: Vascular; 2017 Oct; 25(5):549-552. PubMed ID: 28330434.
    Abstract:
    Background There have been well-documented implications of race/ethnicity on the outcome of various vascular diseases. Little literature has examined the effect of race/ethnicity on venous disease. Iliac vein stenting is an emerging technology in treating chronic venous insufficiency. To further characterize this disease and its treatment, we chose to study the effect of selected clinical factors including race/ethnicity on the early complications of non-thrombotic iliac vein stenting. Methods In this observational study, data analysis was performed for 623 patients with chronic venous insufficiency who underwent iliac vein stenting during the time period from August 2012 to September 2014. Patients were categorized by Caucasians ( n = 396), African Americans ( n = 89), Hispanics ( n = 138), and others ( n = 23). These were correlated with the age, gender, presenting sign according to CEAP classification, percentage of iliac vein stenosis, post-operative thrombosis and pain score. Pain score was obtained post-operatively on a Likert scale of 0-10. Follow-up was performed after completion of the procedure, through post-operative visits and duplex exams every three months for the first year. Statistical analysis was performed using Chi-square and Student's t-test, Pearson's test and multivariate regression. Results The average age of the study patients was 67.8 years (age range 23-96 years, ± 14.2 SD). Sixty-seven patients were women. The presenting sign according to CEAP classification was (C3 = 331, C4 = 175, C5 = 51, C6 = 66). The average pain score was 2.6 (±2.9 SD). The average degree of stenosis was 64.9% (±3.8 SD). There were insufficient numbers in the "other" race/ethnicity group for further analysis. The number of patients with iliac vein stent thrombosis was 14 (2.2%). When analyzing each race/ethnicity in our dataset with univariate analysis, we found that Caucasians were significantly older than the African Americans and Hispanics ( P < 0.0001). There tended to be more women in the Caucasian group as compared to the Hispanics ( P = 0.04). There were no differences in presenting sign according to CEAP classification or degree of stenosis between the three groups. Hispanics tended to have higher pain scores post-operatively than Caucasians ( P = 0.01). It was found that 1.8% of Caucasians, 3.4% of African Americans and 2.9% of Hispanics had post-operative iliac vein stent thrombosis ( P = 0.55). Men have higher CEAP score than women regardless of race/ethnicity ( P = 0.0001). On the other hand, women tended to have higher pain score than men ( P = 0.04). There were no differences between men and women regarding age, degree of stenosis, and stent thrombosis. Linear multivariate regression test and Pearson's test revealed that age is inversely related to pain score ( P < 0.0001). ANOVA multivariate regression statistical analysis showed no relation between race/ethnicity and pain score ( P = 0.98), and one-way ANOVA showed that the Caucasians were the eldest ethnic group in the study ( P < 0.0001). Linear multivariate regression test and Pearson's correlation test revealed that race/ethnicity is not correlated with thrombosis of iliac vein after stenting ( P = 0.8). Conclusion Race/ethnicity is not significantly associated with CEAP score, degree of iliac vein stenosis, or post-operative thrombosis or pain scores. Age was inversely associated with pain score after iliac vein stenting.
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