Table 2.
Factors affecting complication rate and improved outcome in 220 patients, assessed by univariate analysis.
| Complications, n (%) |
Improved outcome |
||||
|---|---|---|---|---|---|
| Variable | N | n (%) | P | n (%) | P |
| Side | |||||
| Right | 104 | 61 (58.7) | 0.653 | 76 (73) | 0.281 |
| Left | 116 | 71 (61.2) | 81 (69.8) | ||
| Sex | |||||
| Male | 133 | 67 (50.4) | <0.001 | 103 | 0.009 |
| Female | 87 | 65 (74.7) | (77.4) 54 (62) | ||
| Pre-stenting urine culture | |||||
| Unknown | 25 | 18 (72) | 0.198 | 17 (85) | 0.016 |
| Negative | 168 | 97 (57.7) | 128 (58.3) | ||
| Positive | 27 | 17 (63) | 12 (57) | ||
| Urine culture during stenting | |||||
| Unknown | 86 | 34 (39.5) | <0.001 | 65 (90.3) | 0.013 |
| Negative | 108 | 73 (67.6) | 79 (80.6) | ||
| Positive | 26 | 25 (69.2) | 13 (61.9) | ||
| Stent length (cm) | |||||
| 22 | 39 | 20 (51.3) | 0.046 | 36 (92.3) | 0.02 |
| 24 | 68 | 35 (51.5) | 51 (75) | ||
| 26 | 106 | 77 (72.6) | 92 (86.8) | ||
| 28 | 7 | 4 | 1 | ||
| Stent diameter (F) | |||||
| 4.7 | 123 | 78 (63.4) | 0.514 | 111 (90.2) | 0.002 |
| 6.0 | 87 | 50 (57.5) | 68 (78.2) | ||
| 8.0 | 10 | 8 | 2 | ||
| Site of the upper coil | |||||
| Pelvis | 182 | 117 (64.3) | 0.387 | 157 (86.3) | 0.095 |
| Calyx | 32 | 18 (56.3) | 21 (65.6) | ||
| Ureter | 6 | 1 | 3 | ||
| Site of the lower coil | |||||
| Same side | 146 | 88 (60.3) | 0.091 | 126 (80.8) | 0.229 |
| Crossing midline | 74 | 48 (64.9) | 55 (74.3) | ||
| Lower coil shape | |||||
| Complete circle | 205 | 130 (63.4) | 0.053 | 165 (80.5) | 0.841 |
| Incomplete circle | 15 | 6 | 15 | ||
| Antibiotic prophylaxis | |||||
| Yes | 180 | 110 (61) | 0.635 | 152 (84.4) | 0.898 |
| No | 40 | 26 (65) | 29 (72.5) | ||
| Number of stent changes | |||||
| 0 | 210 | 128 (61) | 0.362 | 172 (81.9) | 0.219 |
| 1 | 9 | 7 | 9 | ||
| 2 | 1 | 1 | 0 | ||
| Stent duration interval (days) | |||||
| ⩽90 | 155 | 84 (54) | 0.035 | 137 (88.4) | 0.002 |
| >90 | 65 | 56 (86) | 33 (50.8) | ||