Table 3. Basal predictors of change over time in serum PTH (ΔPTH) by general linear mixed model.

	Beta (C.I. 95%)	P
Time (months)	0.06 (-0.38; 0.24)	0.673
Age (years)	0.12 (-0.24; 0.48)	0.517
Male gender (yes vs no)	4.87 (-5.0; 14.75)	0.333
Diabetes (yes vs no)	7.40 (-3.19; 17.98)	0.171
CKD stage 1–2	Ref
Stage 3a	3.93 (-11.87;19.73)	0.626
Stage 3b	15.35 (0.64; 30.06)	0.041
Stage 4	35.14 (19.78–50.49)	<0.0001
Stage 5	58.95 (38.12–79.79)	<0.0001
Hypertension (yes vs no)	1.64 (-18.7; 22.0)	0.874
Prior CVD (yes vs no))	7.28 (-4.49; 19.05)	0.225
Serum Phosphate (mg/dL)	10.09 (2.78;17.40)	0.007
Serum total Calcium (mg/dL)	-6.35(-14.89; 2.19)	0.145
Serum PTH (pg/mL)	-0.38 (-0.43;-0.33)	<0.0001
Proteinuria (mg/day)	1.44 (-2.98; 5.85)	0.523
Constant	34.5 (-52.87; 121.91)	0.439