Table 2.
Mean time interval in months (±SD) and number of episodes (in parenthesis) between the initial surgical placement of AVF and the first and follow-up radiological investigations (invest.) in relation to various background diagnoses.
| Surg. to 1st invest. (n = 174) | Follow-up invest. (n = 348) | Surg. to 1st PTA | Follow-up PTA (n = 320) | PTA, numbers (n = 484) | |
|---|---|---|---|---|---|
| Glomerulonephritisa | 24 ± 32 (28) | 9 ± 16 (48) | 46 ± 58 (26)b–f | 13 ± 19 (33)b | 2.0 ± 1.2 (59)b |
| Diabetic nephropathyb | 14 ± 25 (47) | 7 ± 9 (110) | 16 ± 23 (48)a | 7 ± 9 (136)a, c | 5.3 ± 5.3 (184)a, c–f |
| Interstitial nephritisc | 18 ± 18 (24) | 8 ± 11 (55) | 22 ± 20 (21)a | 12 ± 12 (40)b | 2.7 ± 1.7 (61)b |
| Hereditary diseased | 23 ± 29 (18) | 5 ± 7 (33) | 23 ± 28 (16)a | 8 ± 6 (16) | 1.7 ± 0.8 (32)b |
| Hypertension, nephrosclerosise | 16 ± 17 (38) | 7 ± 8 (82) | 19 ± 23 (37)a | 10 ± 8 (80) | 2.9 ± 2.0 (117)b |
| Other diagnosesf | 17 ± 23 (19) | 4 ± 7 (20) | 15 ± 17 (16)a | 10 ± 11 (15) | 1.6 ± 0.8 (31)b |
SD: standard deviation; AVF: arteriovenous fistula; PTA: percutaneous transluminal angioplasty; ANOVA: analysis of variance.
Data are also displayed for the mean time interval in months between the initial surgical placement of AVF and the first and follow-up episodes of PTA intervention. These data include all interventions at the same instance, for example, if three different stenoses were dilated at the same time, each dilatation was calculated as one separate event. Mean numbers of PTA/sessions (±SD) and total PTAs (in parenthesis) are also given. Data were generated with ANOVA.
Significant differences (p < 0.05) between groups.