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Table 1 Patient characteristics according to type of catheter used for AKI requiring renal replacement therapy

From: Non-tunneled versus tunneled dialysis catheters for acute kidney injury requiring renal replacement therapy: a prospective cohort study

  NTDC only TDC only Both NTDC and TDC p-value
Number of patients 77 35 42
Number of catheters 91 36 49 non-tunneled, 44 tunneled
Age, mean ± SD 61.1 ± 15.1 62.4 ± 15.6 62.6 ± 13.2 0.84
Female, % 40.3 48.6 42.9 0.71
Race, % 0.27
 White 81.8 77.2 90.5  
 Black 5.2 14.3 4.8  
 Hispanic 2.6 5.7 4.8  
 Other 10.4 2.9 0  
AKI severity of diseasea score, mean ± SD 26.4 ± 7.4 15.8 ± 5.1 21.5 ± 6.6 <0.001
Charlson score, median (IQR) 2 (1–3) 3 (2–5) 3 (1–5) 0.52
Hypertension, % 62.3 71.4 71.4 0.49
Diabetes mellitus, % 37.7 40.0 40.5 0.95
Chronic kidney disease, % 16.9 34.3 38.1 0.02
Congestive heart failure, % 19.5 14.3 35.7 0.05
Coronary artery disease, % 31.2 40.0 31.0 0.62
Hyperlipidemia, % 40.3 34.3 45.2 0.62
Malignancy, % 32.5 31.4 23.8 0.60
Cause of AKI <0.001
 ATN 63.6 34.3 59.5  
 Otherb 36.4 65.7 40.5  
Primary team, % <0.001
 MICU 48.1 8.6 40.5  
 CCU 22.1 5.7 11.9  
 Medicine 3.9 40 9.5  
 Oncology 5.2 17.1 11.9  
 Other 20.8 28.6 26.2  
Renal team, % <0.001
 Consult 7.8 77.1 31.0  
 ICU 90.1 22.9 69.1  
Type of RRT, %c <0.001
 IHD only 16.9 91.4 42.9  
 CVVH only 58.4 5.7 4.8  
 Both IHD and CVVH 24.7 2.9 52.4  
Number of days on RRT, Median (IQR)d 6 (3–11) 8 (4–13) 17 (10–28) <0.001
In-hospital mortality, % 74.0 22.9 14.3 <0.001
  1. AKI Acute kidney injury; ATN Acute tubular necrosis; CVVH Continuous veno-venous hemofiltration; CCU Coronary care unit; ICU Intensive care unit; IHD Intermittent hemodialysis; IQR Interquartile range; MICU, Medical intensive care unit; NTDC Non-tunneled dialysis catheter; RRT Renal replacement therapy; SD Standard deviation; TDC tunneled dialysis catheter
  2. aRisk equation by Demirjian et al. [13] calculated at time of initiation of RRT
  3. bOther common causes of AKI in descending order include: other (35.7%) pre-renal azotemia (3.3%), tumor lysis (3.3%), and acute interstitial nephritis (1.3%)
  4. cType of RRT, % - type of modality of RRT patient received while in the hospital
  5. dNumber of days on RRT – in-hospital number of days on RRT