Table 2.

General characteristics of participants at the time of inclusion.

Parameter	VIDD with SHPT (n = 38)	P value‡	VIDD (n = 59)	P value‡	Controls (n = 36)
Agea (year) (median (IQR))	44 (36–55)	0.85	43 (36–50)	0.49	44 (37–57)
Genderb (n) male	5	0.54	12	1.00	7
BMIa (kg/m2) (median (IQR))	29.4 (26.4–36.0)	0.15	29.4 (25.5–37.2)	0.10	27.8 (23.5–31.1)
Currently smokingb (n)	4	0.51	11	1.00	6
Medical history
Cardiovascular diseasec (n)	11	0.68	18	0.77	12
Venous thromboembolismb (n)	2	0.49	2	0.52	0
Diabetesc (n)	10	0.89	13	0.53	10
Chronic kidney diseaseb (n)	1	1.00	1	1.00	1
Endocrine disordersc (n)	14	0.17	12	0.10	19

Data are expressed as median (interquartile range) unless otherwise indicated. P values were rounded to 2 decimals. Null hypotheses: when compared to the controls, for the patients with secondary hyperparathyroidism due to vitamin D deficiency, as well as for the patients with normal PTH level despite vitamin D deficiency, there are no statistically significant differences in general characteristics.

‡P-values regard comparison vs. controls. aMann–Whitney U test; bFisher’s exact test; cChi-square test.

VIDD, vitamin D deficiency; SHPT, secondary hyperparathyroidism; N, number; PTH, parathyroid hormone; y, year; BMI, body-mass index.