Table 6

Predicting RA in PIA patients: results of backward stepwise regression, excluding MSUS variables

Variable

Coding if categorical

B

SE

Wald

P-value

OR (95% CI)


Age

(years)

<50:

0

≥50:

1

1.52

0.49

9.52

0.002

4.58 (1.74 to 12)

SJC /72

<1:

0

≥1:

1

1.26

0.55

5.21

0.023

3.52 (1.19 to 10)

JPS

n/a

1.38

0.50

7.67

0.006

3.99(1.50 to 11)

ESR

(mm/h)

<24

0

≥24

1

1.14

0.53

4.63

0.031

3.13 (1.11 to 8.85)

ACPA

Neg:

0

Pos:

1

4.30

0.88

24.17

<0.001

74 (13 to 409)

Constant

-5.61

1.26

20.0

<0.001

-


Results of backward stepwise logistic regression analysis to identify independent clinical (non-MSUS) predictors of RA amongst PIA sub-cohort. B values are regression coefficients. CI, confidence interval; OR, odds ratio; SE, standard error of B. Additional abbreviations as per Table 3. See text.

Pratt et al. Arthritis Research & Therapy 2013 15:R118   doi:10.1186/ar4298

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