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Table 6 Predicting RA in PIA patients: results of backward stepwise regression, excluding MSUS variables

From: Predicting persistent inflammatory arthritis amongst early arthritis clinic patients in the UK: is musculoskeletal ultrasound required?

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 -
  1. 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.