Table 1.
Patient characteristics according to type of catheter used for AKI requiring renal replacement therapy
| 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 |
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
aRisk equation by Demirjian et al. [13] calculated at time of initiation of RRT
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%)
cType of RRT, % - type of modality of RRT patient received while in the hospital
dNumber of days on RRT – in-hospital number of days on RRT