Table 5 Correlation between the age, clinical, laboratory, and radiographic data of AS patients regarding the VEGF

Age (years)

0.211

0.080

Disease duration (years)

0.174

0.151

Morning stiffness (hours)

 − 0.018

0.882

ESR

0.159

0.190

CRP titer

0.152

0.209

BASFI

0.866

 < 0.001*

ASDAS

0.366

0.002*

X-ray score

0.359

0.002*

MSASS

0.784

 < 0.001*

Treatment duration (months)

 − 0.109

0.367