Skip to main content

Table 3 Standard (current) model: multivariate analyses

From: The relationship between synovitis quantified by an ultrasound 7-joint inflammation score and physical disability in rheumatoid arthritis – a cohort study

Predictor Model without US-7 Model with US-7
β (95% CI) P value β (95% CI) P value
Female 0.211 (0.045; 0.376) 0.013 0.208 (0.044; 0.372) 0.013
Age (years) 0.149 (0.097; 0.201) <0.001 0.147 (0.096; 0.199) <0.001
BMI 0.008 (-0.007; 0.024) 0.276 0.008 (-0.007; 0.023) 0.291
RF+ or ACPA+ 0.029 (-0.115; 0.172) 0.696 0.029 (-0.114; 0.172) 0.691
Prevalent vs. incident RA -0.048 (-0.209; 0.113) 0.558 -0.050 (-0.212; 0.111) 0.541
DAS28-CRP 0.184 (0.155; 0.213) <0.001 0.202 (0.166; 0.238) <0.001
GSsynSS - -0.003 (-0.014; 0.008) 0.595
PDsynSS - -0.001 (-0.015; 0.014) 0.916
GStenSS - -0.062 (-0.129; 0.006) 0.073
PDtenSS - 0.018 (-0.032; 0.068) 0.487
Erosions score - 0.005 (-0.022; 0.032) 0.720
R 2 (% variability explained) 44.7 45.9
Improved R 2 - 1.1 <0.001 *
  1. Predicted variable is current health assessment questionnaire (HAQ) score. Comparison of models based on demographic, clinical and immunological parameters with or without the German 7-joint ultrasound score (US7) sum-scores (SS). *P value of significance for improvement of prediction. BMI body mass index, RF rheumatoid factor, ACPA anti-citrullinated peptide antibodies, GS greyscale, PD power Doppler, syn synovitis, ten tenosynovitis, ES erosions score. P-values higlighted in italics are significant at p < 0.05