Table II.

Changes of mean serum 25(OH)D, PTH, calcium, and phosphorus levels between baseline and following vitamin D₃ replacement (3^rd and 6^th months) in all patients

Parameter	Baseline	3rd month	6th month	P-value
25(OH)D [ng/ml]	7.8 (2.9–17.8)	36.8 (18.0–76.0)	27.0 (10.7–67.6)	< 0.001*a,b,c
PTH [pg/ml]	84.0 (38.0–182.9)	45.6 (24.7–89.9)	50.5 (23.1–110.0)	< 0.001a,b, 0.783*c
Total calcium*** [mg/dl]	9.43 ±0.44	9.55 ±0.42	9.65 ±0.41	0.041a, 0.001b, 0.149c**
Phosphorus [mg/dl]	3.35 ±0.44	3.27 ±0.45	3.32 ±0.38	0.322a,b,c

^*Friedman test

^**general linear model

^***corrected calcium (for albumin)

^abaseline vs. 3^rd month

^bbaseline vs. 6^th month

^v3^rd month vs. 6^th month.