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Table 8 Spearman’s rank correlation between serum IL-1β and physical activity, BMI, and symptom duration

From: A pilot study on biomarkers for tendinopathy: lower levels of serum TNF-α and other cytokines in females but not males with Achilles tendinopathy

   Achilles tendon status (grouped by gender)
   Total M AT M Control M Total F AT F Control F
Physical Activitya rho 0.0018 −0.4154 0.9000 0.1152 −0.2571 0.8000
  p 0.9943 0.1397 0.0374 0.7514 0.6228 0.2000
  n 19 14 5 10 6 4
BMIb rho −0.0026 −0.0107 −0.1429 −0.0091 0.0357 0.4000
  p 0.9911 0.9698 0.7872 0.9788 0.9394 0.6000
  n 21 15 6 11 7 4
Pain: symptom durationc rho   0.2704    −0.4383  
  p   0.3497    0.3253  
  n   14    7  
  1. aMeasured in MET-hours/week, bmeasured in kg/m2, cmeasured in months
  2. Note: M male, F female, AT Achilles tendinopathy
  3. Physical activity score was missing for 2 men and 1 woman, symptom duration was missing for 1 man with tendinopathy