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Table 5 Time-lag 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

Analysis number Predictor β (95% CI) P value Percent variability explained by the model (R 2)
1 Previous HAQ 0.762 (0.698; 0.827) <0.001 64.8
Previous PDsynSS -0.017 (-0.027; -0.007) 0.001
2 Previous PDsynSS -0.025 (-0.039; -0.011) <0.001 32.8
Previous DAS28 0.156 (0.109; 0.203) <0.001
3 Previous HAQ 0.703 (0.620; 0.786) <0.001 65.4
Previous PDsynSS -0.022 (-0.034; -0.011) <0.001
Previous DAS28 0.050 (0.005; 0.096) 0.029
4 Previous HAQ 0.754 (0.690; 0.819) <0.001 64.2
Previous GSsynSS -0.009 (-0.017; -0.001) 0.024
5 Previous GSsynSS -0.012 (-0.023; -0.001) 0.036 32.5
Previous DAS28 0.135 (0.088; 0.183) <0.001
6 Previous HAQ 0.707 (0.623; 0.792) <0.001 64.5
Previous GSsynSS -0.013 (-0.022; -0.004) 0.006
Previous DAS28 0.039 (-0.007; 0.085) 0.096
  1. Predicted variable is current health assessment questionnaire (HAQ) score. Predictors used in the six analyses are either previous HAQ score or disease activity score in 28 joints (DAS28) or both, and previous power Doppler (PD) synovitis (SS) or greyscale (GS) syn sum-score (SS) (previous = measured 12 months ago. ES = erosions score. P-values higlighted in italics are significant at p <  0.05