| All | Stage 2 | Stage 3 | Stage 4 | Stage 5 | P- value |
---|---|---|---|---|---|---|
 | n = 1138 | n = 95 | n = 470 | n = 364 | n = 209 |  |
Age (years old) | 68 ± 14 | 57 ± 17 | 67 ± 13 | 71 ± 12 | 69 ± 14 | <0.001 |
 | 70 [61–77] | 61 [46–71] | 70 [60–76] | 73 [64–78] | 70 [61–78] |  |
Male gender | 792 | 57 | 361 | 255 | 119 | <0.001 |
 | 69.6% | 60.0% | 76.8% | 70.1% | 56.9% |  |
Self-feeding ability | 1118 | 94 | 460 | 360 | 204 | 0.744 |
 | 99.1% | 98.9% | 99.1% | 99.4% | 98.6% |  |
BMI (kg/m2) | 23.7 ± 4.0 | 23.0 ± 4.0 | 23.7 ± 3.7 | 23.9 ± 4.1 | 23.8 ± 4.5 | 0.351 |
 | 23.3 [21.0 - 25.8] | 22.6 [20.6 - 25.4] | 23.5 [21.3 - 25.7] | 23.4 [21.0 - 26.4] | 23.0 [20.9 - 25.6] |  |
BMI ≥ 25 kg/m2 | 328 | 20 | 129 | 115 | 64 | 0.473 |
 | 32.8% | 26.0% | 32.0% | 35.1% | 33.2% |  |
Diabetes | 422 | 15 | 141 | 163 | 103 | <0.001 |
 | 37.1% | 15.8% | 30.0% | 44.8% | 49.3% |  |
HbA1c (NGSP) (%) | 6.1 ± 1.0 | 6.0 ± 1.1 | 6.1 ± 1.0 | 6.2 ± 1.0 | 6.1 ± 1.0 | 0.083 |
 | 5.9 [5.6 - 6.5] | 5.7 [5.5 - 6.1] | 5.9 [5.6 - 6.4] | 6.0 [5.6 - 6.6] | 5.9 [5.5 - 6.5] |  |
Albumin (g/dl) | 4.0 ± 0.8 | 4.0 ± 0.6 | 3.8 ± 0.6 | 3.5 ± 0.6 | 3.8 ± 0.6 | <0.001 |
 | 4.3 [3.7 - 4.5] | 4.1 [3.8 - 4.4] | 3.9 [3.5 - 4.2] | 3.6 [3.2 - 4.0] | 4.0 [3.5 - 4.3] |  |
eGFR (ml/min per 1.73 m2) | 32.7 ± 18.7 | 72.1 ± 8.5 | 43.3 ± 8.2 | 22.0 ± 4.4 | 9.9 ± 3.0 | <0.001 |
 | 29.8 [17.5 - 45.0] | 70.6 [64.9 - 79.7] | 43.2 [35.5 - 50.2] | 21.7 [17.9 - 25.6] | 9.8 [7.4 - 12.4] |  |
SBP (mmHg) | 140 ± 22 | 139 ± 20 | 137 ± 22 | 140 ± 24 | 146 ± 22 | <0.001 |
 | 138 [125–152] | 136 [125–150] | 135 [122–150] | 136 [125–154] | 143 [136–160] |  |
DBP (mmHg) | 78 ± 15 | 83 ± 14 | 79 ± 15 | 75 ± 15 | 79 ± 15 | <0.001 |
 | 78 [68–87] | 83 [74–92] | 79 [70–87] | 75 [64–83] | 78 [69–90] |  |
Causes of CKD | Â | Â | Â | Â | Â | Â |
Diabetic nephropathy | 287 | 10 | 74 | 116 | 87 | <0.001 |
 | 25.5% | 10.5% | 16.0% | 32.0% | 42.2% |  |
Nephrosclerosis | 451 | 23 | 214 | 159 | 55 | Â |
 | 40.0% | 24.2% | 46.2% | 43.8% | 26.7% |  |
Glomerulonephritis | 216 | 43 | 83 | 49 | 41 | Â |
 | 19.2% | 45.3% | 17.9% | 13.5% | 19.9% |  |
Others | 173 | 19 | 92 | 39 | 23 | Â |
 | 15.4% | 20.0% | 19.9% | 10.7% | 11.2% |  |
Prevalence of CVD | 305 | 7 | 104 | 130 | 64 | <0.001 |
 | 26.8% | 7.4% | 22.1% | 35.7% | 30.6% |  |