Table 2.

Correlations between clinical and biochemical assessments in AS patients with active disease (n = 128)

	Age	Disease duration	BASDAI	ESR	CRP	ASDAS	BASFI	PINP Z	sCTX Z	OC Z	LS BMD T	Hip BMD T
Disease duration (years)	0.600a	–
BASDAI (range 0–10)	NS	NS	–
ESR (mm/h)	NS	NS	NS	–
CRP (mg/L)	NS	NS	NS	0.693a	–
ASDAS	NS	0.187a	0.651a	0.374a	0.668a	–
BASFI (range 0–10)	NS	0.203a	0.561a	NS	NS	0.472a	–
PINP Z-score	0.362a	0.266a	NS	NS	NS	NS	NS	–
sCTX Z-score	NS	0.200a	NS	NS	NS	NS	NS	0.443a	–
OC Z-score	NS	NS	NS	NS	NS	NS	NS	0.578a	0.601a	–
LS BMD T-score	NS	NS	0.205a	NS	NS	NS	NS	NS	NS	NS	–
Hip BMD T-score	NS	NS	NS	NS	NS	NS	NS	NS	−0.380a	−0.272a	0.626a	–
25OHvitD (nmol/L)	NS	NS	NS	NS	NS	NS	NS	NS	NS	NS	NS	NS

^aStatistically significant correlation (p < 0.05)

See Table 1 for definitions