Table 1.
Demographic and baseline characteristics of the subjects
| APD group (n = 42) | APD–CAPD group (n = 28) | CAPD group (n = 26) | P value† | |
|---|---|---|---|---|
| Male, n (%) | 23 (54.8) | 14 (50.0) | 13 (50.0) | 0.898 |
| Age (years) | 51.88 ± 13.49 | 55.00 ± 16.61 | 55.74 ± 9.77 | 0.527 |
| Systolic blood pressure (mmHg) | 152.70 ± 16.90 | 147.70 ± 18.00 | 154.90 ± 20.89 | 0.418 |
| Diabetic nephropathy, n (%) | 15 (35.7) | 12 (42.8) | 8 (30.8) | 0.648 |
| Medication, n (%) | ||||
| Antihypertensive agents | 30 (71.4) | 22 (67.9) | 19 (73.1) | 0.795 |
| Anemia-improving agents* | 31 (73.8) | 22 (78.6) | 18 (69.2) | 0.737 |
| Phosphorus-reducing agents | 22 (52.4) | 14 (50.0) | 15 (57.7) | 0.845 |
| Blood urea nitrogen (mmol/L) | 25.05 ± 8.97 | 22.66 ± 9.12 | 21.29 ± 7.17 | 0.195 |
| Creatinine (umol/L) | 853.40 ± 233.15 | 811.10 ± 225.99 | 824.30 ± 279.70 | 0.761 |
| Uric acid (umol/L) | 445.80 ± 108.00 | 437.70 ± 126.78 | 434.60 ± 88.64 | 0.907 |
| iPTH (pg/mL) | 418.90 ± 193.32 | 447.90 ± 165.40 | 445.90 ± 228.64 | 0.845 |
| Serum potassium (mmol/L) | 4.72 ± 0.77 | 4.60 ± 0.72 | 4.63 ± 0.75 | 0.803 |
| Serum calcium (mmol/L) | 2.02 ± 0.27 | 2.08 ± 0.23 | 2.11 ± 0.25 | 0.323 |
| Serum phosphorus (mmol/L) | 1.99 ± 0.73 | 1.89 ± 0.59 | 1.92 ± 0.71 | 0.805 |
| Serum sodium (mmol/L) | 140.20 ± 2.95 | 140.10 ± 3.53 | 140.90 ± 5.06 | 0.735 |
| CO2-CP (mmol/L) | 22.24 ± 2.39 | 21.73 ± 3.07 | 22.58 ± 3.04 | 0.532 |
| Albumin (g/L) | 35.13 ± 6.12 | 33.87 ± 5.44 | 32.93 ± 5.52 | 0.298 |
| Pre-albumin (mg/L) | 301.20 ± 76.53 | 291.70 ± 52.59 | 289.20 ± 75.21 | 0.751 |
| Total protein (g/L) | 65.06 ± 11.19 | 65.56 ± 9.18 | 64.15 ± 8.71 | 0.872 |
| Fasting plasma glucose (mmol/L | 5.61 ± 1.55 | 5.65 ± 1.78 | 5.57 ± 1.06 | 0.984 |
| Hemoglobin (g/L) | 80.69 ± 13.43 | 82.54 ± 12.46 | 81.35 ± 14.67 | 0.855 |
| eGFR (mL/min/1.73 m2)# | 5.71 ± 2.10 | 5.52 ± 1.69 | 6.40 ± 2.29 | 0.312 |
| Urine volume (mL) | 1352.00 ± 303.57 | 1381.00 ± 446.44 | 1581.00 ± 545.54 | 0.149 |
APD, automatic peritoneal dialysis; CAPD, continuous ambulatory peritoneal dialysis; CO2-CP, carbon dioxide combining power; eGFR, estimated glomerular filtration rate; iPTH, intact parathyroid hormone
*Included erythropoiesis-stimulating agents, iron, folic acid and vitamin B12
#CKD-EPI formula was used to calculate eGFR
†The P values were compared among the three groups by one-way ANOVA