Vitamin D Status in Patients Operated for Primary Hyperparathyroidism: Comparison of Patients from Southern and Northern Europe

Table 3

Bone mineral density before and one year after surgery for primary hyperparathyroidism. Medians (IQR) Wilcoxon’s signed rank test.

BMD site	Spanish cohort; Before surgery	Spanish cohort; One year postop	P	Swedish cohort; Before surgery	Swedish cohort; One year postop	P	P diff Spanish-swedish preop
Lumbar spine, absolute	0.79 (0.70–0.88)	0.83 (0.74–0.93)	<0.001	1.00 (0.83–1.11)	1.03 (0.88–1.14)	<0.001	<0.001
Lumbar spine, 𝑧-score	−0.7 (−1.6–0.3)	0.7 (0.4–1.3)	<0.001	−0.4 (−1.6–0.6)	0.7 (0.4–1.38)	<0.001	0.75
Femoral neck, absolute	0.62 (0.56–0.69)	0.64 (0.57–0.70)	<0.001	0.76 (0.69–0.85)	0.79 (0.70–0.88)	<0.001	<0.001
Femoral neck, 𝑧-score	−0.7 (−1.3 to −0.1)	−0.4 (−1.1–0.2)	<0.001	−0.5 (−1.1–0.1)	−0.5 (−0.9–0.2)	<0.001	0.11
Total hip, absolute	0.76 (0.68–0.85)	0.76 (0.70–0.87)	<0.001	0.77 (0.56–0.88)	0.84 (0.75–0.95)	<0.001	0.40
Total hip, 𝑧-score	−0.5 (−0.9–0.3)	−0.2 (−0.8–0.5)	<0.001	−0.4 (1.0–0.4)	0 (−0.7–0.7)	<0.001	0.91