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Table 4 Time-lag model

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

Predictor RA β (95% CI) P value* P value** Percent variability explained - R 2
Previous DAS28-CRP all 0.102 (0.062; 0.143) <0.001   29.0
i 0.072 (-0.008; 0.152) 0.079 0.353  
p 0.115 (0.069; 0.161) <0.001   
Previous GSsynSS all 0.003 (-0.006; 0.012) 0.530   7.4
i 0.000 (-0.019; 0.019) 1.000 0.713  
p 0.004 (-0.007; 0.015) 0.465   
Previous PDsynSS all -0.003 (-0.015; 0.009) 0.605   0.4
i -0.001 (-0.021; 0.019) 0.924 0.816  
p -0.004 (-0.018; 0.011) 0.595   
Previous GStenSS all 0.006 (-0.044; 0.056) 0.822   0.7
i 0.005 (-0.089; 0.099) 0.922 0.972  
p 0.007 (-0.053; 0.066) 0.825   
Previous PDtenSS all -0.005 (-0.041; 0.032) 0.801   0.5
i -0.019 (-0.092; 0.054) 0.606 0.655  
p 0.000 (-0.042; 0.042) 1.000   
Previous ES all 0.028 (-0.007; 0.062) 0.118   0.4
i -0.043 (-0.158; 0.072) 0.462 0.216  
p 0.033 (-0.004; 0.070) 0.081   
Previous HAQ all 0.740 (0.676; 0.803) <0.001   63.5
i 0.627 (0.496; 0.759) <0.001 0.050  
p 0.775 (0.705; 0.846) <0.001   
  1. Univariate analyses and interaction with incident (i) or prevalent (p) rheumatoid arthritis (RA). Predicted variable is current HAQ score, univariate predictors are previous disease activity score in 28 joints using C-reactive protein (DAS28-CRP), sum-scores for greyscale (GS) and power Doppler (PD) synovitis (syn), GS and PD tenosynovitis (ten), and erosions score (ES). *P value of significance of given β. **P value of significance of difference between incident and prevalent RA. P-values higlighted in italics are significant at p < 0.05