Table 2.
Association of baseline demographic, clinical, and postoperative ultrasound characteristics of patients with unassisted AVF maturation versus assisted AVF maturation or failure to mature
| Variable | All Patients | Unassisted Maturation | Assisted Maturation or Failure to Mature | P Value |
|---|---|---|---|---|
| No. of patients | 246 | 121 | 125 | |
| Age in yr, mean±SD | 53±14 | 51±12 | 55±15 | 0.07 |
| Men, n (%) | 153 (62) | 82 (68) | 71 (57) | 0.08 |
| Black, n (%) | 202 (82) | 103 (85) | 99 (79) | 0.22 |
| Comorbidities, n (%) | ||||
| Hypertension | 234 (95) | 114 (94) | 120 (96) | 0.52 |
| Diabetes mellitus | 139 (56) | 69 (57) | 70 (56) | 0.87 |
| Coronary artery disease | 69 (28) | 32 (26) | 37 (30) | 0.58 |
| Peripheral vascular disease | 38 (15) | 20 (17) | 18 (14) | 0.64 |
| Cerebrovascular disease | 51 (21) | 22 (18) | 29 (23) | 0.33 |
| Heart failure | 85 (34) | 44 (36) | 41 (33) | 0.56 |
| Obesity, BMI≥30 kg/m2 | 114 (46) | 59 (49) | 55 (44) | 0.45 |
| Antiplatelet drugs | 117 (48) | 56 (46) | 61 (49) | 0.69 |
| AVF location, upper arm | 155 (63) | 91 (75) | 64 (51) | <0.001 |
| Postoperative ultrasound | ||||
| Draining vein diameter in mm, mean±SD | 7.4±2.2 | 8.0±2.4 | 6.8±2.1 | <0.001 |
| Blood flow, ml/min, median [IQR] | 665 [424–926] | 860 [643–1142] | 486 [227–714] | <0.001 |
| Depth in mm, mean±SD | 3.5±2.8 | 3.0±2.4 | 4.1±3.2 | 0.002 |
| Stenosis, n (%) | 133 (54) | 47 (39) | 86 (69) | <0.001 |
AVF, arteriovenous fistula; BMI, body mass index; IQR, interquartile range.