Table 3

Multiple regression models showing variables associated with the BASDAI, BASFI and BAS-G at baseline

Response variablea


Independent variable

Regression coefficient (SE)

P value


Model 1

BASDAI

Female

0.302 (0.119)

0.012

MMP-8 (pg/ml)

6.667 × 10-6 (2.533 × 10-6)

0.009

CRP (mg/l)

0.005 (0.003)

0.054

Model 2

BASFI

Age

0.012 (0.004)

0.002

CRP (mg/dl)

0.011 (0.003)

0.001

Model 3

BAS-G

Female

0.314 (0.131)

0.018

MMP-8 (pg/ml)

6.548 × 10-6 (2.786 × 10-6)

0.020


CRP, C-reactive protein; MMP, matrix metalloproteinase; SE, standard error. aFor each regression model, square root transformation of the response variable - Bath ankylosing spondylitis disease activity index (BASDAI), Bath ankylosing spondylitis functional index (BASFI) or Bath ankylosing spondylitis global health (BAS-G) - was carried out to achieve a normal distribution of the data.

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

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