Table 2.
Univariate analysis of variables examined as potential predictors of AKI after TJA.
| Variable | Group |
Statistics | P value | |
|---|---|---|---|---|
| Case (n = 54) | Control (n = 162) | |||
| Preoperative | ||||
| BMI | Mean = 38.54 | Mean = 35.20 | T = 2.46 | .016 |
| Preoperative SCr | Mean = 1.282 | Mean = 0.985 | T = 3.25 | .002 |
| Smoker | ||||
| Yes | 20 (37.0%) | 42 (25.9%) | χ2 = 2.44 | .118 |
| No | 34 (63.0%) | 120 (74.1%) | ||
| ASA score | ||||
| Low score (1-2) | 9 (16.7%) | 61 (37.7%) | χ2 = 8.14 | .004 |
| High score (3-4) | 45 (83.3%) | 101 (62.3%) | ||
| NSAID use | ||||
| Yes | 27 (50.0%) | 60 (37.0%) | χ2 = 2.83 | .093 |
| No | 27 (50.0%) | 102 (63.0%) | ||
| ACE-I use | ||||
| Yes | 21 (38.9%) | 73 (45.1%) | χ2 = 0.63 | .428 |
| No | 33 (61.1%) | 89 (54.9%) | ||
| ARB use | ||||
| Yes | 14 (25.9%) | 50 (30.9%) | χ2 = 0.47 | .491 |
| No | 40 (74.1%) | 112 (69.1%) | ||
| Diuretic use | ||||
| Yes | 30 (55.6%) | 78 (48.1%) | χ2 = 0.89 | .346 |
| No | 24 (44.4%) | 84 (51.9%) | ||
| Intraoperative | ||||
| Type of anesthesia | ||||
| General | 43 (79.6%) | 128 (79.0%) | χ2 = 0.01 | .92 |
| Spinal | 11 (20.4%) | 34 (21.0%) | ||
| Bilaterality | ||||
| Unilateral | 41 (75.9%) | 145 (89.5%) | χ2 = 6.25 | .012 |
| Bilateral | 13 (24.1%) | 17 (10.5%) | ||
| Duration of surgery | Mean = 118.24 | Mean = 102.57 | T = 3.15 | .002 |
| EBL | Mean = 498.11 | Mean = 340.13 | T = 2.65 | .009 |
| Postoperative | ||||
| Postoperative Hb difference | Mean = −4.37 | Mean = −2.75 | T = −7.22 | <.0001 |
| LOS | Mean = 8.07 | Mean = 4.50 | T = 8.03 | <.0001 |
| Hospital charges | Mean = $224,533.26 | Mean = $142,752.73 | T = 54.74 | <.0001 |
| Postoperative NSAID use | ||||
| Yes | 16 (29.6%) | 37 (22.8%) | ||
| No | 38 (70.4%) | 125 (77.2%) | χ2 = 1.01 | .315 |
Bold values indicate that there is a statistically significant association between the variable and post-operative AKI development (P < .05).
ACE-I, angiotensin-converting enzyme inhibitor; ARB, angiotensin receptor blocker; LOS, length of stay.