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Table 1 Correlations between pre- and postoperative pain, n = 96 (Spearman’s correlation coefficients, p)

From: Correlations between inflammatory cytokines, muscle damage markers and acute postoperative pain following primary total knee arthroplasty

Pre-op scores Post-op NRSR Post-op NRSW
T1 T2 T3 T4 T1 T2 T3 T4
Pre-op NRSR 0.01, 0.911 0.04, 0.706 −0.14, 0.182 −0.07, 0.482 0.34, 0.001* 0.37, <0.001* 0.25, 0.013* 0.26, 0.010*
Pre-op NRSW 0.40, <0.001* 0.37, <0.001* −0.001, 0.995 −0.06, 0.595 0.30, 0.003* 0.38, <0.001* 0.39, <0.001* 0.34, 0.001*
Pre-op PDQ 0.08, 0.432 0.06, 0.587 −0.12, 0.240 0.04, 0.697 0.75, <0.001* 0.52, <0.001* 0.47, <0.001* 0.36, <0.001*
  1. Abbreviations: NRSR numerical rating scale at rest, NRSW numerical rating scale at walking, PDQ pain disability questionnaire, T1-T4 1, 2, 3 and 5 days after surgery, respectively. The significant correlations according p < 0.05 (*) remained significant after Bonferroni correction (p = 0.05/3).