Table 2.

Plasma albumin and total CO₂ concentrations and distributions in the stages of CKD

Parameter	CKD Stage			P
	3	4	5
Whole population (n)	356	254	81	–
albumin (g/L)	40.2 ± 5.1	39.0 ± 5.5	39.0 ± 5.7	0.007
total CO2 (mmol/L)	26.3 ± 2.9	24.3 ± 3.0	22.8 ± 3.4	<0.001
Plasma albumin <35 g/L (n)	40	50	18
% of respective CKD stage	11.2	19.7	22.2	0.004
Total CO2 < 22 mmol/L (n)	25	49	35
% of respective CKD stage	7.0	19.3	43.2	<0.001