Fig. 3From: Serum levels of the proinflammatory cytokine interleukin-6 vary based on diagnoses in individuals with lumbar intervertebral disc diseasesSpearman’s correlation coefficients between interleukin (IL)-6 levels and (a) age, (b) symptom duration, (c) body mass index (BMI), or (d) smoking history. The resulting Spearman’s correlation coefficient (ρ) and corresponding p value are reportedBack to article page