Table 2.
Comparative analysis between demographic, VA, and dialysis data of cases who experienced vascular events (correction of stenosis or thrombosis)
| Characteristic | Overall, N = 80 | Group 1, N = 29 | Group 2, N = 51 | p value |
|---|---|---|---|---|
| Age, median [IQR] (range), years | 63 [49–73] (22–89) | 59 [45–67] (28–80) | 66 [50–78] (22–89) | 0.037 1 |
| Gender, n (%) | 0.7752 | |||
| Male | 54.0 (67.5) | 19.0 (65.5) | 35.0 (68.6) | |
| Female | 26.0 (32.5) | 10.0 (34.5) | 16.0 (31.4) | |
| Ethnicity, n (%) | 0.004 3 | |||
| British | 50.0 (62.5) | 12.0 (41.4) | 38.0 (74.5) | |
| Asian | 24.0 (30.0) | 15.0 (51.7) | 9.0 (17.6) | |
| African | 2.0 (2.5) | 0.0 (0.0) | 2.0 (3.9) | |
| Caribbean | 4.0 (5.0) | 2.0 (6.9) | 2.0 (3.9) | |
| Mixed/any/unknown | 0.0 (0.0) | 0.0 (0.0) | 0.0 (0.0) | |
| BMI, median [IQR] (range), kg/m2 | 26 [23–29] (11–46) | 26 [24–28] (19–46) | 26 [23–30] (11–44) | 11 |
| Primary kidney disease, n (%) | 0.7003 | |||
| DN | 20.0 (25.0) | 6.0 (20.7) | 14.0 (27.5) | |
| HTN/RVD | 12.0 (15.0) | 5.0 (17.2) | 7.0 (13.7) | |
| ON/inf | 6.0 (7.5) | 2.0 (6.9) | 4.0 (7.8) | |
| GN | 15.0 (18.8) | 8.0 (27.6) | 7.0 (13.7) | |
| Cystic kidney disease | 12.0 (15.0) | 3.0 (10.3) | 9.0 (17.6) | |
| Unknown/miscellaneous | 15.0 (18.8) | 5.0 (17.2) | 10.0 (19.6) | |
| Prior stenosis, n (%) | 44 (55) | 14 (48.3) | 30(58.8) | 0.3621 |
| Hypertension, n (%) | 0.4763 | |||
| Yes | 71.0 (88.8) | 27.0 (93.1) | 44.0 (86.3) | |
| DM, n (%) | 0.6992 | |||
| Yes | 27.0 (33.8) | 9.0 (31.0) | 18.0 (35.3) | |
| CVS, n (%) | 0.3072 | |||
| Yes | 30.0 (37.5) | 13.0 (44.8) | 17.0 (33.3) | |
| Site of anastomosis, n (%) | 0.9733 | |||
| Radio-cephalic | 31.0 (38.8) | 11.0 (37.9) | 20.0 (39.2) | |
| Radio-brachial | 3.0 (3.8) | 1.0 (3.4) | 2.0 (3.9) | |
| Brachio-cephalic | 30.0 (37.5) | 12.0 (41.4) | 18.0 (35.3) | |
| Brachio-basilic | 15.0 (18.8) | 5.0 (17.2) | 10.0 (19.6) | |
| Brachio-axillary | 1.0 (1.3) | 0.0 (0.0) | 1.0 (2.0) | |
| VA, n (%) | 0.5503 | |||
| AVF | 77.0 (96.3) | 29.0 (100.0) | 48.0 (94.1) | |
| AVG | 3.0 (3.8) | 0.0 (0.0) | 3.0 (5.9) | |
| VA vintage, median [IQR] (range) | 2 [1–4] (0–16) | 4 [2–6] (0–16) | 2 [1–3] (0–16) | 0.002 1 |
| HD vintage, median [IQR] (range) | 2 [1–4] (0–19) | 3 [2–6] (0–19) | 2 [1–4] (0–15) | <0.001 1 |
| CFD-extended, median (IQR), days | 363 (356–364) | 364 (363–364) | 362 (354–363) | 0.002 4 |
| Access abandonment, n (%) | 10 (12.5) | 3 (10.3) | 7 (13.7) | 0.7403 |
Bold values are statistically significant (p < 0.05).
AVF/G, arteriovenous fistula/graft; BMI, body mass index; CVS, cardio/cerebrovascular disease; CFD, complications-free days; DN, diabetic nephropathy; GN, glomerulonephritis; HD, haemodialysis; HTN, hypertension; inf, infection; RVD, reno-vascular disease; ON, obstructive nephropathy.
1Wilcoxon rank sum test.
2Pearson’s chi-squared test.
3Fisher’s exact test.
4Mann-Whitney test.