Predictive Factors of Secondary Normocalcemic Hyperparathyroidism after Roux-en-Y Gastric Bypass
Table 4
Anthropometric and laboratory values during follow-up: group 3 patients () recovered from SNHPT within 6 months after surgery and group 4 patients () within 18 months; group 2 patients () without presurgical SNHPT.
Variable
Group 4
Group 3
(group 4 versus group 3)
Group 2
6 months
Serum 25-hydroxy vitamin D (ng/mL, mean ± SD)
25.5 ± 2.5
35.6 ± 1.8
N.S.
37.1 ± 3.1
Serum calcium (mg/dL, mean ± SD)
9.1 ± 1.0
9.08 ± 1.1
N.S.
9.1 ± 1.7
Serum PTH (ml/dL, mean ± SD)
74.56 ± 5.2
50.7 ± 3.5
<0.05
49.3 ± 2.5
Elapsed time since last effective diet (years, mean ± SD)
12 ± 1.5
5 ± 0.5
<0.05
4 ± 1.2
Extra weight-loss percentage (%EWL, mean ± SD)
44.1 ± 2.5
40.3 ± 2.2
<0.05
38.9 ± 1.8
12 months
Serum 25-hydroxy vitamin D (ng/mL, mean ± SD)
26.4 ± 3.2
42.4 ± 1.7
N.S.
46.1 ± 1.3
Serum calcium (mg/dL, mean ± SD)
9.3 ± 0.5
9.08 ± 0.9
N.S.
9.1 ± 1.1
Serum PTH (mg/dL, mean ± SD)
73 ± 3.2
43.1 ± 3.3
<0.05
45.6 ± 1.4
Extra weight loss percentage (%EWL, mean ± SD)
54.3 ± 1.5
46.6 ± 3.1
<0.05
46.5 ± 1.9
18 months
Serum 25-hydroxy vitamin D (ng/mL, mean ± SD)
32.1 ± 0.9
43.7 ± 1.2
N.S.
46.3 ± 1.9
Serum calcium (mg/dL, mean ± SD)
9.8 ± 1.1
9.6 ± 2.0
N.S.
9.4 ± 1.1
Serum PTH (mg/dL, mean ± SD)
56.6 ± 2.2
40.3 ± 1.5
<0.05
39.1 ± 0.5
Extra weight loss percentage (%, mean ± SD)
65.3 ± 2.6
59.1 ± 3.2
<0.05
59.6 ± 2.8
ANOVA for continuous variables; N.S. not statistically significant.
