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Table 7 Spearman’s rank correlation between serum PDGF-BB 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

−0.1895

−0.5868

0.7000

−0.0545

−0.4857

1.0000

 

p

0.4372

0.0274

0.1881

0.8810

0.3287

0.0000

 

n

19

14

5

10

6

4

BMIb

rho

−0.0831

−0.0536

−0.1429

0.2455

0.3214

0.0000

 

p

0.7202

0.8496

0.7872

0.4669

0.4821

1.000

 

n

21

15

6

11

7

4

Pain: symptom durationc

rho

 

0.2995

  

−0.4383

 
 

p

 

0.2982

  

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