Table 3.
Characteristics of sessions with and without RCA during follow-up
| Characteristic | Sessions without RCA | Session with RCA | P Value | ||
|---|---|---|---|---|---|
| Number of Sessions | Mean ± SD or Median (IQR) | Number of Sessions | Mean ± SD or Median (IQR) | ||
| Duration of hemodialysis (hrs) | 4154 | 3.8 ± 0.5 | 605 | 3.9 ± 0.6 | 0.80 |
| Dry weight (kg) | 4150 | 84.8 ± 27.9 | 605 | 90.1 ± 30.2 | 0.83 |
| Percent over dry weight (%) | 4138 | 3.9 ± 2.4 | 604 | 3.9 ± 2.4 | 0.04 |
| Kilogram over dry weight | 4138 | 3.1 ± 1.9 | 604 | 3.6 ± 2.1 | 0.07 |
| Ultrafiltration rate (ml/kg/hr) | 4154 | 9.9 ± 4.9 | 605 | 10.1 ± 4.6 | 0.01 |
| Intradialytic decrease in weight (kg) | 4138 | 2.6 ± 1.3 | 604 | 3.0 ± 1.3 | 0.002 |
| Pre-dialysis potassium (mEq/L) | 1408 | 4.9 ± 0.8 | 259 | 5.0 ± 0.8 | 0.74 |
| Intradialytic potassium change (mEq/L) | 1364 | −1.2 ± 0.8 | 253 | − 1.3 ± 0.8 | 0.13 |
| Pre-dialysis calcium (mEq/L) | 1416 | 8.7 ± 0.9 | 260 | 8.8 ± 0.8 | 0.56 |
| Intra-dialytic calcium change (mEq/L) | 1366 | 0.7 ± 1.1 | 254 | 0.6 ± 0.9 | 0.53 |
| Pre-dialysis magnesium (mg/dL) | 1416 | 2.4 ± 0.5 | 260 | 2.2 ± 0.4 | 0.88 |
| Intradialytic magnesium change (mg/dL) | 1370 | −0.3 ± 0.3 | 255 | 0.3 ± 0.3 | 0.97 |
| Pre-dialysis phosphorus (mg/dL) | 1414 | 5.3 ± 1.7 | 260 | 5.1 ± 1.7 | 0.31 |
| Intradialytic phosphorus change (mg/dL) | 1362 | −3.0 ± 1.5 | 255 | −3.0 ± 1.5 | 0.28 |
| Pre-dialysis bicarbonate (mEq/L) | 1415 | 22.1 ± 3.9 | 260 | 22.7 ± 4.2 | 0.87 |
| Intradialytic bicarbonate change (mEq/L) | 1368 | 4.9 ± 3.3 | 255 | 4.5 ± 3.5 | 0.75 |
| Pre-dialysis sodium (mEq/L) | 1416 | 136.6 ± 4.3 | 260 | 137.9 ± 4.1 | 0.16 |
| Intradialytic sodium change (mEq/L) | 1366 | 0.6 ± 4.1 | 254 | 0.0 ± 3.4 | 0.28 |
| Nadir intradialytic systolic blood pressure (mm Hg) | 4148 | 120.0 (105.0, 138.0) | 605 | 113.0 (99.0, 130.0) | 0.31 |
| Nadir intradialytic diastolic blood pressure (mm Hg) | 4148 | 67.0 (56.0, 74.0) | 605 | 62.0 (54.0, 71.0) | 0.06 |
| Dialysis Prescription Parameters | Number of Sessions (n/N) | % | Number of Sessions (n/N) | % | |
| Dialysate temperature | < 0.001 | ||||
| 36–36.9 °C | 541/4064 | 13.3% | 46/596 | 7.7% | |
| ≥37 °C | 3523/4064 | 86.7% | 550/596 | 92.3% | |
| Dialysate potassium | 0.26 | ||||
| 2.0 mEq/L | 3327/4008 | 83.0% | 422/595 | 70.9% | |
| 3.0 mEq/L | 681/4008 | 17.0% | 173/595 | 29.1% | |
| Dialysate calcium | < 0.001 | ||||
| < 2.0 mEq/L | 925/4146 | 22.3% | 31/604 | 5.1% | |
| 2.0–2.4 mEq/L | 81/4146 | 2.0% | 1/604 | 5.1% | |
| 2.5 mEq/L | 2211/4146 | 53.3% | 433/604 | 71.7% | |
| > 2.5 mEq/L | 929/4146 | 22.4% | 139/604 | 23.0% | |
| Dialysate sodium | 0.67 | ||||
| ≤ 135 mEq/L | 501/3803 | 13.2% | 70/558 | 12.5% | |
| 136–139 mEq/L | 408/3803 | 10.7% | 21/558 | 3.8% | |
| 140 mEq/L | 2894/3803 | 76.1% | 467/558 | 83.7% | |
| Sodium modeling | 581/4140 | 14.0% | 48/603 | 8.0% | 0.40 |
| Dialysate bicarbonate | 0.20 | ||||
| ≤ 28 mEq/L | 215/4043 | 5.3% | 29/600 | 4.8% | |
| 29–34 mEq/L | 962/4043 | 23.8% | 125/600 | 20.8% | |
| 35 mEq/L | 1548/4043 | 38.3% | 217/600 | 36.2% | |
| > 35 mEq/L | (1318/4043) | 32.6% | 229/600 | 38.2% | |
Data are presented as number of sessions over mean ± standard deviation or as % (n/N)>. Hrs hours, Kg kilogram, mL milliliter, mg/dL milligram per deciliter, mm Hg millimeters of mercury