Table 2.

Comparisons of the baseline biochemical indexes

Index	USPD (n=309)	USHD (n=233)	P value
eGFR (mL/min/1.73m2)	5.3 (4.6, 6.4)	5.6 (3.6, 7.8)	0.738
Serum potassium (mmol/L)	3.9 (3.5, 4.9)	4.0 (3.6, 4.5)	0.427
Calcium (mmol/L)	1.89 (1.69, 2.06)	1.99 (1.78, 2.08)	0.212
Phosphorus (mmol/L)	1.91 (1.71, 2.23)	1.62 (1.29, 2.19)	0.010
iPTH (ng/L)	355.0 (217.5, 504.0)	219.0 (127.5, 449.0)	0.083
Serum albumin (g/L)	33.2±5.1	31.7±5.9	0.203
B-type natriuretic peptide (pg/mL)	299.0 (134.0, 900.5)	479.0 (249.0, 1480.0)	0.054
Haemoglobin (g/L)	82.0 (72.5, 95.0)	82.0 (66.5, 98.0)	0.888

All data are presented as median (P25, P75), except albumin (mean±SD).

eGFR, estimated glomerular filtration rate; iPTH, intact parathyroid hormone; USHD, urgent-start haemodialysis; USPD, urgent-start peritoneal dialysis.