Table 2.
Univariate analysis of continuous variables.
| Variables | Total (N = 1,727) | No readmission within 6 months (N = 1,065) | Readmission within 6 months (N = 662) | p-value | No readmission within 3 months (N = 1,309) | Readmission within 3 months (N = 418) | p-value |
|---|---|---|---|---|---|---|---|
| BMI (kg/m2) | 20.78 (18.49, 23.44) | 20.89 (18.66, 23.46) | 20.40 (18.37, 23.44) | 0.073 | 20.82 (18.61, 23.56) | 20.26 (18.34, 22.89) | 0.036 |
| Cr (μmol/L) | 87.10 (64.70, 122.60) | 83.10 (63.05, 115.60) | 92.90 (69.08, 130.93) | <0.001 | 84.60 (63.75, 116.65) | 98.90 (70.48, 135.90) | <0.001 |
| Urea (mmol/L) | 8.01 (5.86, 11.46) | 7.57 (5.67, 10.86) | 8.61 (6.24, 12.31) | <0.001 | 7.62 (5.75, 10.98) | 9.13 (6.41, 13.20) | <0.001 |
| UA (μmol/L) | 454.00 (359.00, 567.00) | 444.00 (352.00, 557.00) | 474.00 (374.00, 600.50) | <0.001 | 442.00 (354.50, 556.50) | 486.50 (384.00, 627.00) | <0.001 |
| GFR (mL/min/1.73 m2) | 64.93 (41.67, 90.09) | 68.84 (44.51, 93.62) | 58.03 (39.20, 83.09) | <0.001 | 67.88 (43.94, 92.24) | 55.96 (37.28, 81.04) | <0.001 |
| RDW-CV (%) | 14.40 (13.60, 15.60) | 14.40 (13.50, 15.50) | 14.40 (13.70, 15.80) | 0.029 | 14.30 (13.60, 15.50) | 14.60 (13.80, 15.90) | 0.001 |
| RDW-SD (fl) | 47.80 (45.20, 51.40) | 47.50 (44.90, 50.90) | 48.10 (45.48, 52.10) | 0.004 | 47.60 (45.00, 50.90) | 48.40 (45.60, 52.80) | 0.001 |
| HGB (g/L) | 117.00 (101.00, 131.00) | 118.00 (102.00, 133.00) | 116.00 (100.00, 129.00) | 0.007 | 118.00 (102.00, 132.00) | 115.00 (99.00, 128.00) | 0.009 |
| Ca (mmol/L) | 2.29 (2.18, 2.40) | 2.28 (2.17, 2.39) | 2.30 (2.19, 2.41) | 0.041 | 2.29 (2.18, 2.40) | 2.29 (2.19, 2.39) | 0.688 |
| K (mmol/L) | 3.87 (3.53, 4.30) | 3.84 (3.49, 4.28) | 3.90 (3.58, 4.37) | 0.009 | 3.84 (3.50, 4.27) | 3.92 (3.62, 4.41) | 0.003 |
| Na (mmol/L) | 139.00 (136.00,141.40) | 139.20 (136.40, 141.70) | 138.80 (135.50, 141.00) | 0.007 | 139.20 (136.40, 141.65) | 138.35 (135.00, 141.00) | <0.001 |
| TG (mmol/L) | 0.95 (0.71, 1.29) | 0.97 (0.73, 1.28) | 0.91 (0.69, 1.31) | 0.099 | 0.96 (0.71, 1.29) | 0.92 (0.70, 1.33) | 0.587 |
| Cholesterol (mmol/L) | 3.58 (2.96, 4.30) | 3.63 (3.03, 4.37) | 3.46 (2.87, 4.23) | 0.004 | 3.62 (3.02, 4.33) | 3.44 (2.83, 4.16) | 0.004 |
| LDL-C (mmol/L) | 1.75 (1.32, 2.28) | 1.78 (1.36, 2.33) | 1.69 (1.26, 2.20) | 0.006 | 1.77 (1.34, 2.31) | 1.66 (1.25, 2.18) | 0.010 |
| HDL-C (mmol/L) | 1.07 (0.86, 1.30) | 1.08 (0.86, 1.31) | 1.06 (0.86, 1.30) | 0.546 | 1.08 (0.87, 1.32) | 1.06 (0.84, 1.26) | 0.093 |
BMI, body mass index; Cr, creatinine; UA, uric acid; GFR, glomerular filtration rate; RDW-CV, coefficient of variation of red blood cell distribution width; RDW-SD, standard deviation of red blood cell distribution width; HGB, hemoglobin; Ca, calcium; K, potassium; Na, sodium; TG, triglyceride; LDL-C, low-density lipoprotein cholesterol; HDL-C, high-density lipoprotein cholesterol.