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Table 1 Comparison of demographic and laboratory characteristics of peritonitis and nonperitonitis groups

From: Overhydration and low serum prealbumin predict peritoneal dialysis-related peritonitis in continuous ambulatory peritoneal dialysis patients

Clinical characteristics and laboratory parameters All patients (n = 278) Peritonitis (n = 44) Nonperitonitis (n = 234) p
Age (years) 48.61 ± 13.63 54.57 ± 12.25 47.49 ± 13.61 0.001
Number of males (n, %) 159 (57.2) 25 (56.8) 134 (57.3) 0.956
PD duration (month) 21 (10–40.25) 18.5 (8–37.5) 23 (10–41) 0.516
Low education (n, %) 63 (22.7) 27 (61.4) 36 (15.4) <  0.001
Hypertension (n, %) 228 (82) 36 (81.8) 192 (82.1) 0.971
Diabetes mellitus (n, %) 47 (16.9) 23 (52.3) 24 (10.3) <  0.001
BMI
 - Mean 21.16 ± 2.93 22.15 ± 3.43 20.97 ± 2.79 0.036
 - < 18.5 46 (16.5) 5 (11.4) 41 (17.5)  
 - 18.5–22.9 168 (60.4) 21 (47.7) 147 (62.8) 0.009
 - ≥ 23 64 (23) 18 (40.9) 46 (19.7)  
 - Min – Max 14.4–33.3 15.4–31.2 14.4–33.3 N/A
OH (L) 1.27 ± 0.18 1.49 ± 0.21 1.23 ± 0.14 <  0.001
 -24 h urine volume (ml) 180 (130–500) 195 (146.25–637.5) 175 (128.75–500) 0.12
 - Loss of RKF (n, %) 200 (71.9) 28 (63.6) 172 (73.5) 0.181
 - Preservation of RKF (n, %) 78 (28.1) 16 (36.5) 62 (26.5)  
PET
 - Mean (D4/P) 0.7 ± 0.08 0.73 ± 0.08 0.7 ± 0.08 0.024
 - H (n, %) 20 (7.2) 6 (13.6) 14 (6)  
 - HA (n, %) 175 (62.9) 28 (63.6) 147 (62.8) 0.236
 - LA (n, %) 80 (28.8) 10 (22.7) 70 (29.9)  
 - L (n, %) 3 (1.1) 0 (0) 3 (1.3)  
Blood urea (mmol/L) 19.29 ± 6.11 19.16 ± 6.89 19.31 ± 5.97 0.88
Creatinine (μmol/L) 772.16 (654.9–955.8) 738.97 (608.43–946.95) 778.8 (657.55–961.99) 0.372
Kt/V 1.98 ± 0.3 2.00 ± 0.31 1.97 ± 0.3 0.597
Total CCr (L/week/1.73m2) 62.65 ± 9.3 63.13 ± 9.57 62.57 ± 9.27 0.713
Hemoglobin
 - Mean (g/L) 100.55 ± 16.9 95.98 ± 15.06 101.41 ± 17.12 0.051
 - Anemia (n, %) 265 (95.3) 43 (97.7) 222 (94.9) 0.41
WBC (g/L) 6.86 ± 1.48 6.94 ± 1.37 6.85 ± 1.5 0.711
Neutrophils (%) 61.38 ± 8.44 61.29 ± 10.77 61.39 ± 7.96 0.94
hs-CRP (mg/L) 2 (1–4) 3.95 (2–5.27) 2 (1–3.7) <  0.001
Glucose (mmol/L) 4.22 (3.77–4.83) 4.47 (3.94–5.34) 4.16 (3.76–4.79) 0.024
Uric acid (μmol/L) 414.63 ± 83.78 427.04 ± 101.02 412.3 ± 80.16 0.285
Na + (mmol/L) 136.93 ± 3.76 136.17 ± 3.38 137.07 ± 3.81 0.145
K+ (mmol/L) 3.67 ± 0.78 3.52 ± 0.58 3.7 ± 0.81 0.164
Ca++ (mmol/L) 2.05 ± 0.29 2.04 ± 0.23 2.05 ± 0.31 0.83
Protein (g/dL) 6.51 ± 0.69 6.45 ± 0.8 6.53 ± 0.67 0.515
Albumin (g/dL) 3.69 ± 0.48 3.36 ± 0.61 3.75 ± 0.42 <  0.001
Prealbumin (mg/dL) 34.35 ± 8.49 26.34 ± 5.54 35.86 ± 8.1 <  0.001
  1. PD Peritoneal Dialysis, BMI Body Mass Index, OH Overhydration, PET Peritoneal Equilibration Test, H High, HA High-Average, LA Low-Average, L Low, WBC White Blood Cell, hs-CRP High-Sensitivity C- Reactive Protein