Table 5

Multiple regression analysis showing baseline association of PC3 (MMP-8, MMP-9, HGF, CXCL8) with the BASDAI

Response variable (BASDAI)^a

Independent variable

Regression coefficient (SE)

P value

Female

0.282 (0.128)

0.029

PC3

0.080 (0.027)

0.004

HGF, hepatocyte growth factor; MMP, matrix metalloproteinase; PC, principal component; SE, standard error. ^aSquare root transformation of the Bath ankylosing spondylitis disease activity index (BASDAI) was carried out to achieve a normal distribution.

Mattey et al. Arthritis Research & Therapy 2012 14:R127   doi:10.1186/ar3857