Collagen parameters in normal and pathological tendons
| ST-N | BT-N | ST-D | ||
|---|---|---|---|---|
| % Collagen | mean (SD) | 48.3 (5.0) | 49.1 (7.1) | 41.1 (8.4)1-165 |
| range | 40.4–65.5 | 36.2–61.6 | 25.5–55.9 | |
| Hyl/triple helix | mean (SD) | 26.8 (0.80) | 20.3 (2.9)1-165 | 31.1 (2.1)1-165 |
| range | 21.0–30.1 | 15.7–28.1 | 27.4–34.7 | |
| HP/triple helix | mean (SD) | 0.80 (0.09) | 0.25 (0.14)1-165 | 0.99 (0.12)1-165 |
| range | 0.63–0.94 | 0.06–0.66 | 0.80–1.21 | |
| LP/triple helix | mean (SD) | 0.056 (0.016) | 0.029 (0.013)1-165 | 0.088 (0.015)1-165 |
| range | 0.034–0.095 | 0.010–0.061 | 0.062–0.108 |
ST-N = normal supraspinatus tendon (n=39, age 18–93 years). BT-N = normal biceps brachii tendon (n=27, age 11–96 years). ST-D = degenerate supraspinatus tendon (n=10, age 55–80 years).
↵1-165 p<0.001 compared with ST-N.