表 2. Levels of blood Ca, P and iPTH in patients with stage 3-5 CKD.

CKD 3～5期患者的血Ca、P和iPTH水平

Group	n	Ca/(mmol/L)	P/(mmol/L)	iPTH/(ng/L)
*P<0.05, vs. control group; #P<0.05, vs. CKD stage 3 group;▲P<0.05, vs. CKD stage 4 group.
Control	60	2.32±0.22	1.02±0.10	37.25±4.66
CKD stage 3	38	2.22±0.25*	1.34±0.12*	145.93±26.04*
CKD stage 4	42	2.14±0.24*	1.57±0.13*，#	231.26±31.87*#
CKD stage 5 without dialysis	59	2.05±0.23*，#	2.04±0.16*，#，▲	417.06±58.69*，#，▲
CKD stage 5 hemodialysis	229	2.08±0.21*，#	1.96±0.15*，#，▲	408.33±54.72*，#，▲
t		17.543	494.561	870.413
P		<0.001	<0.001	<0.001