Table 3.

Comparison of calcium, phosphate, and intact parathyroid hormone concentrations within prespecified ranges between oral calcitriol and IV vitamin D analog groups during follow-up

Biochemical MeasureMonths 1–3Months 4–6Months 7–12
Oral CalcitriolIV Vitamin DP ValueaOral CalcitriolIV Vitamin DP ValueaOral CalcitriolIV Vitamin DP Valuea
Calcium ≤10 mg/dl2151 (95%)2022 (90%)<0.0012013 (95%)1931 (91%)<0.0011890 (95%)1862 (93%)0.002
Phosphate 3–5.5 mg/dl1452 (64%)1383 (61%)0.041357 (64%)1307 (61%)0.081290 (65%)1233 (61%)0.02
iPTH 150–600 pg/dl1471 (68%)1604 (72%)0.0021364 (67%)1474 (71%)0.0061340 (69%)1446 (73%)0.002
All three within rangeb939 (43%)922 (42%)0.23884 (43%)878 (42%)0.46871 (45%)882 (45%)0.96
  • All patients with values in any one time period were included; P values reflect comparisons between oral calcitriol and IV vitamin D analog groups within each time period. Data are displayed as n (%). IV, intravenous; iPTH, intact parathyroid hormone.

  • a Chi-squared test.

  • b Calcium, phosphate, and iPTH all within specified range.