Serum Vitamin D and Pyridinoline Cross-Linked Carboxyterminal Telopeptide of Type I Collagen in Patients with Ankylosing Spondylitis

Table 1

Comparison of indicators between AS and control groups.

Factor	AS	Controls	value
	150	168
Age (years)	29.19 ± 8.94	31.83 ± 9.97
Gender (male/female)	127/23	128/40
25(OH)D (nmol/L)	57.92 ± 24.42	91.24 ± 42.02
ICTP (ug/L)	5.72 ± 3.88	3.69 ± 1.26

Note: we compared means using -test and proportions using chi-square test.
25-Hydroxyvitamin D (25(OH)D); pyridinoline cross-linked carboxyterminal telopeptide of type I collagen (ICTP); ankylosing spondylitis (AS).