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Table 2 Multiple linear regression models for initial DAS28 and changes in DAS28a

From: Decreases in serum levels of S100A8/9 (calprotectin) correlate with improvements in total swollen joint count in patients with recent-onset rheumatoid arthritis

Initial DAS28 (n= 43; r2 = 0.422; F= 16.355; P< 0.000)b ΔDAS28 (n= 41; r2 = 0.349, F= 11.727; P< 0.000)c
Variables Parameter estimate SEM t-value Pvalue Variable Parameter estimate SEM t-value P value
Intercept 4.351 0.246 17.662 0.000 Intercept -2.117 0.277 -7.649 0.000
Initial CRP 0.037 0.010 3.619 0.001 Initial CRP 0.080 0.038 2.124 0.040
Initial S100A8/9 0.000 0.000 2.007 0.052 ΔCRP 0.136 0.042 3.248 0.002
  1. aDAS28, Disease Activity Score for 28 joints; SEM, standard error of the mean; CRP, C-reactive protein. r2 values are adjusted. bExcluded predictors are age and initial S100A12. cExcluded predictors are age, initial S100A12, initial S100A8/9, ΔS100A12 and ΔS100A8/9.