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Table 2 Potential risk factors

From: Incidence and risk factors of acute kidney injury after femoral neck fracture in elderly patients: a retrospective case-control study

  Overall N=308 With AKI N=37 Without AKI N=271 P-Valve
Preoperative creatinine (umol/L)     0.643
  76.66+41.28 73.70+29.46 77.07+42.67  
Preoperative albumin (g/L)     0.402
  36.43+4.17 35.89+4.81 36.50+4.07  
Postoperative albumin (g/L)     0.000
  31.64+3.90 27.54+2.60 32.21+3.71  
Preoperative hemoglobin (g/L)     0.193
  115.42+17.68 113.72+11.98 117.12+19.22  
Hemoglobin change (g/L)     0.000
  8.6+11.73 22.3+15.85 6.73+9.68  
Preoperative MAP (mmHg)     0.352
  90.52+15.88 88.50+14.56 92.54+17.11  
Intraoperative hypotension     0.000
  25 (8.1%) 13 (35.1%) 12 (4.4%)  
Anesthesia     1.000
 General anesthesia 71 (23.1%) 8 (21.6%) 63 (23.2%)  
 Lumbar anesthesia 237 (76.9%) 29 (78.4%) 208 (76.8%)  
Surgery     0.681
 Internal fixation 52 (16.9%) 8 (21.6%) 44 (16.2%)  
 Hemi-hip arthroplasty 204 (66.2%) 24 (64.9%) 180 (66.4%)  
 THA 52 (16.9%) 5 (13.5%) 47 (17.3%)  
Operation time (min)     0.163
  91.96+36.05 99.73+27.59 90.90+36.97  
Intraoperative blood loss (ml)     0.036
  126.24+126.58 167.03+152.24 120.65+121.92  
Blood transfusion     0.169
  181 (59%) 25 (67.6%) 156 (57.8%)  
Postoperative complications     0.353
 Infection 32 (10.4%) 4 (10.8%) 28 (10.3%)  
 Cerebral infarction 1 (3.2%) 1 (2.7%) 0 (0.0%)  
 Pulmonary embolism 1 (3.2%) 0 (0.0%) 1 (2.7%)  
 Delirium 1 (3.2%) 0 (0.0%) 1 (2.7%)  
 Poor wound healing 1 (3.2%) 0 (0.0%) 1 (2.7%)  
  1. MAP mean arterial pressure, THA total hip arthroplasty