Table 7.
Spearman’s rank correlation between serum PDGF-BB and physical activity, BMI, and symptom duration
| 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 | |||||
aMeasured in MET-hours/week, bmeasured in kg/m2, cmeasured in months
Note: M male, F female, AT Achilles tendinopathy
Physical activity score was missing for 2 men and 1 woman, symptom duration was missing for 1 man with tendinopathy