Fluid overload at start of continuous renal replacement therapy is associated with poorer clinical condition and outcome: a prospective observational study on the combined use of bioimpedance vector analysis and serum N-terminal pro-B-type natriuretic peptide measurement

Table 2 Clinical outcomes between different types of fluid status before continuous renal replacement therapy

Fluid status	Type 1	Type 2	Type 3	Type 4	Total	P value
Number	19	15	10	45	89
Death within 3 days, n (%)	1 (5.3)	2 (13.3)	2 (20)	10 (22.2)	15 (16.9)	0.399
Death before discharge, n (%)	5 (26.3)	5 (33.3)	4 (40)	29 (64.4)	43 (48.3)	0.019
CRRT duration, day	5.1 ± 4.1	5.2 ± 3.0	8.5 ± 13.0	10.0 ± 8.7	8.0 ± 8.2	0.091
Recovery of renal function, n (%)	4 (57.1)	6 (67.7)	3 (50)	9 (23.7)	22 (36.7)	0.047

Fluid status: type 1, no overhydration and B-type natriuretic peptide (BNP) normal; type 2, no overhydration but BNP abnormal; type 3, overhydration but BNP normal; type 4, overhydration and BNP abnormal. CRRT, continuous renal replacement therapy.

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