Table 1.
Descriptive analysis of the main clinical and analytical variables. p values refer to the comparison between males and females. Mean ± SD.
| Variables | All (n = 60) | Female (n = 19) | Male (n = 41) | p | Normal Range |
|---|---|---|---|---|---|
| Age | 81.85 (5.58) | 83.00 (5.23) | 81.32 (5.72) | n.s | |
| Female, n (%) | 19 (31.7) | 19 (100.0) | 41 (100.0) | n.s | |
| Dialysis vintage (months) | 49.76 (40.4) | 53.22 (42.8) | 48.16 (39.7) | n.s | |
| Catheter (CVC), n (%) | 15 (25.0) | 5 (26.3) | 10 (24.4) | n.s | |
| Diabetes, n (%) | 20 (60.6) | 3 (68.4) | 23 (56.1) | n.s | |
| Malignancy, n (%) | 39 (65.0) | 15 (78.9) | 24 (58.5) | n.s | |
| Kt/V urea | 1.80 (0.38) | 2.01 (0.30) | 1.70 (0.37) | <0.01 | >1.3 M; >1.4 F |
| Albumin (g/dL) | 3.66 (0.48) | 3.59 (0.60) | 3.70 (0.41) | n.s | 3.4–5.4 |
| Total protein (g/dL) | 6.10 (0.67) | 5.99 (0.81) | 6.14 (0.60) | n.s | 6–8.3 |
| Hemoglobin (g/dL) | 11.36 (1.06) | 11.26 (1.13) | 11.40 (1.03) | n.s | M: 13.8–17.2; F: 13.1–15.1 |
| Phosphate (mg/dL) | 4.6 (1.1) | 4.5 (1.2) | 4.6 (1.0) | n.s | 2.5–4.5 |
| CRP (mg/L) | 1.60 (2.78) | 1.68 (2.65) | 1.57 (2.87) | n.s | <5 |
| 25-OH vitamin D (ng/mL) | 21.52 (13.1) | 22.31 (13.82) | 21.1 (12.95) | n.s | 20–40 |
| Total cholesterol (mg/dL) | 137.7 (31.1) | 144.95 (32) | 134.3 (30.5) | n.s | <200 |
| BMI (kg/m2) | 25.20 (3.65) | 24.06 (3.97) | 25.73 (3.41) | 0.05 | 18.5–24.5 |
| Brachial perimeter (cm) | 26.32 (2.82) | 25.70 (3.11) | 26.62 (2.66) | n.s | Male > 25.74; Female > 24.5 |
| Waist perimeter (cm) | 92.78 (10.41) | 83.88 (10.08) | 97.01 (7.58) | <0.01 | Male < 95; Female < 82 |
| Hip perimeter (cm) | 100.58 (7.23) | 98.39 (7.56) | 101.61 (6.93) | n.s | Male < 100; Female < 80 |
| Waist hip index | 0.92 (0.08) | 0.85 (0.06) | 0.96 (0.07) | <0.01 | Male < 1; Female < 0.8 |
| Tricipital fold (cm) | 1.19 (0.43) | 1.41 (0.46) | 1.09 (0.38) | 0.01 | Male < 1.5; Female < 1.9 |
| Subscapular fold (cm) | 15.40 (7.10) | 13.22 (7.61) | 16.43 (6.70) | 0.05 | Female 17.6 mm; Male 15.95 mm |
| Abdominal fold (cm) | 18.39 (6.35) | 15.77 (4.39) | 19.80 (6.85) | 0.05 | Male 19.8 mm; Female 22.2 |
| Muscle mass (kg) | 19.27 (3.82) | 15.57 (1.87) | 20.99 (3.23) | <0.01 | >20 |
| Fat mass (kg) | 22.63 (5.86) | 22.01 (7.40) | 22.92 (5.08) | n.s | |
| Fat mass (%) | 34.04 (6.27) | 38.10 (6.94) | 32.15 (4.98) | <0.01 | <30% |
| FFM (kg) | 43.78 (8.59) | 34.59 (4.01) | 48.04 (6.55) | <0.01 | |
| FFM % | 65.96 (6.27) | 61.90 (6.94) | 67.84 (4.98) | <0.01 | <70% |
| TBW (L) | 32.42 (6.52) | 25.70 (3.16) | 35.53 (5.18) | <0.01 | <55% |
| ECW (L) | 15.55 (3.36) | 12.46 (1.96) | 16.98 (2.88) | <0.01 | <45% |
| ICW (L) | 16.85 (3.29) | 13.24 (1.33) | 18.52 (2.47) | <0.01 | <55% |
| ECW/ICW | 0.92 (0.08) | 0.94 (0.09) | 0.91 (0.08) | n.s | 0.5–1 |
| BCM (kg) | 22.83 (4.43) | 18.53 (2.26) | 24.82 (3.71) | <0.01 | <60 |
| ECM (kg) | 19.47 (3.87) | 14.97 (1.68) | 21.56 (2.59) | <0.01 | <40 |
| FFMH (%) | 73.94 (1.88) | 74.26 (2.04) | 3.79 (1.81) | n.s | <75 |
| Fluid excess (L) | 1.06 (1.49) | 0.76 (1.22) | 1.20 (1.60) | n.s | |
| HG criteria, n (%) | 15 (25.0) | 6 (31.6) | 9 (22.0) | n.s | Male > 27 kg; Female > 16 kg |
| ASM criteria, n (%) | 36 (60.0) | 13 (68.4) | 23 (56.1) | n.s | Male > 20 kg; Female > 15 kg |
| GS criteria, n (%) | 18 (30.0) | 7 (36.8) | 11 (26.8) | n.s | >0.8 m/s |
| MIS (pts) | 6.02 (3.81) | 6.00 (3.21) | 6.02 (4.09) | n.s | <5 |
VA: vascular access, CVD: cardiovascular disease, FFM: fat-free mass, TBW: total body water, ECW: extracellular water, ICW: intracellular water, BCM: body cellular mass and ECM: extracellular mass. FFMH: fat-free mass hydration. HG: grip strength by dynamometry, ASM: appendicular skeletal muscle mass, GS: gait speed and MIS: malnutrition–inflammation score. n.s: no significant.