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Table 1 Comparison of parameters associated with UFNET between world and Japan

From: Ultrafiltration in Japanese critically ill patients with acute kidney injury on renal replacement therapy

  World (not including Japan) Japan p value
Q-1. Criteria used for UFNET initiation, N (%)
(a) Persistent oliguria/anuria (urine output < 0.5 mL/kg/h for ≥ 12 h) 477 (50.9) 38 (26.6) < 0.001
(b) Severe hypoxemia (PaO2/FIO2 ratio < 150) 134 (14.3) 18 (12.6) 0.586
(c) Pulmonary edema with or without hypoxemia 162 (17.3) 32 (22.4) 0.138
(d) Cumulative fluid balance (> 1000 mL) 51 (5.4) 3 (2.1) 0.088
(e) Fluid overload > 10% of body weight 57 (6.1) 3 (2.1) 0.053
(f) Ongoing need for fluids in the presence of oliguria 57 (6.1) 49 (34.3)  < 0.001
Total 938 143  
Q-2. Criteria used for UFNET prescription, N (%)
(a) 24-h fluid balance 148 (14.8) 8 (5.3) 0.001
(b) Cumulative fluid balance 201 (20.1) 29 (19.1) 0.765
(c) Weight gain 48 (4.8) 21 (13.8) < 0.001
(d) Radiographic features of fluid overload 21 (2.1) 10 (6.6) 0.002
(e) Hemodynamic status (HR, BP, CVP, PPV, dose of vasopressors) 552 (55.3) 82 (53.9) 0.763
(f) Volume of anticipated fluid use in the next 24 h 22 (2.2) 1 (0.7) 0.205
(g) Arterial lactate 7 (0.7) 1 (0.7) 0.953
Total 999 152  
Q-3. Method used to achieve UFNET using CRRT, N (%)
(a) By varying ultrafiltration rate only 536 (48.6) 77 (54.2) 0.203
(b) By varying replacement fluid rate only 60 (5.4) 20 (14.1) < 0.001
(c) By varying both ultrafiltration and replacement fluid rate 508 (46.0) 45 (31.7) 0.001
Total 1104 142  
Q-4. How frequently did you check net fluid balance during CRRT? N (%)
(a) ≤ Every 1 h 409 (35.8) 32 (21.9) < 0.001
(b) ≤ Every 2 h 511 (44.8) 60 (41.1) 0.398
(c) ≤ Every 4 h 660 (57.8) 89 (61.0) 0.473
(d) ≤ Every 6 h 772 (67.7) 104 (71.2) 0.383
(e) ≤ Every 8 h 884 (77.5) 127 (87.0) 0.009
(f) ≤ Every 12 h 1015 (89.0) 136 (93.2) 0.121
(g) ≤ Every 24 h 1141 (100) 146 (100) na
  1. Statistical analyses were performed using the Chi-square test or Fisher’s exact test, as appropriate
  2. na not applicable