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Table 4 Correlations between the clinical variables and laboratory markers in axSpA with exercise therapy

From: Clinical improvement and reduction in serum calprotectin levels after an intensive exercise programme for patients with ankylosing spondylitis and non-radiographic axial spondyloarthritis

   ∆ BASMI ∆ ASDAS-CRP CRP baseline IL-6 baseline IL-17 baseline TNF-α baseline ∆ CRP ∆ IL-6 ∆ IL-17 ∆ TNF-α
∆ BASMI ρ 1 0.271 -0.017 0.236 -0.027 -0.311 0.003 -0.058 -0.049 0.417
All (n = 40) ρ . ns ns ns ns 0.09 ns ns ns p < 0.05
∆ ASDAS-CRP ρ 0.271 1 -0.231 0.391 -0.131 -0.02 0.406 -0.205 0.035 0.377
All (n = 40) ρ ns . ns p < 0.05 ns ns p < 0.001 ns ns p < 0.05
∆ BASMI ρ 1 0.774 -0.596 0.441 -0.230 -0.477 -0.098 -0.213 0.010 0.563
nr-axSpA (n = 18) ρ . p < 0.001 p < 0.01 ns ns ns ns ns ns p < 0.05
∆ ASDAS-CRP ρ 0.774 1 -0.187 0.388 0.028 -0.351 0.437 -0.249 -0.074 0.636
nr-axSpA (n = 18) ρ p < 0.001 . ns ns ns ns p < 0.05 ns ns p < 0.05
∆ BASMI ρ 1 0.007 0.233 0.099 0.217 -0.143 0.123 0.158 -0.110 0.273
AS (n = 22) ρ . ns ns ns ns ns ns ns ns ns
∆ ASDAS-CRP ρ 0.007 1 -0.328 0.356 -0.266 0.102 0.395 -0.147 0.154 0.186
AS (n = 22) ρ ns . ns ns ns ns p < 0.05 ns ns ns
  1. Statistical analysis: correlation analyses were performed by Spearman correlation (ρ). Statistical significance was determined as p < 0.05. axSpA axial spondyloarthritis, nr-axSpA non-radiographic axial spondyloarthritis, AS ankylosing spondylitis, ASDAS-CRP AS disease activity score, BASMI Bath AS metrology index, CRP C-reactive protein, IL interleukin, TNF tumour necrosis factor, ∆ changes of the scores/biomarkers values, ns not significant