Table 1 Average, standard deviation (SD) and range for the measured reference parameters along with correlation and RMSE values for the test group.

From: Combination of optical coherence tomography and near infrared spectroscopy enhances determination of articular cartilage composition and structure

  

Mean ± SD (Range)

All samples

ICRS-based division

r

RMSE

p

r

RMSE

p

Collagen orientation angle (π)

Superficial

23.2 ± 12.9 (5.6–74.4)

0.74

7.37

<0.0001

0.86

5.91

<0.0001

Deep

77.1 ± 7.6 (39.2–87.5)

0.52

5.72

<0.0001

0.50

5.85

0.0001

Collagen content (AU)

Superficial

21.6 ± 9.2 (1.4–48.3)

0.62

5.84

<0.0001

0.72

5.18

<0.0001

Deep

34.7 ± 9.2 (12.7–68.0)

0.65

5.59

<0.0001

0.78

4.81

<0.0001

PG content (AU)

Superficial

5.34 ± 2.41 (0.15–18.99)

0.42

1.24

0.0018

0.69

0.97

<0.0001

Deep

6.47 ± 1.99 (0.50–15.58)

0.70

0.99

<0.0001

0.77

0.89

<0.0001

PG content (OD)

Superficial

1.02 ± 0.49 (0.09–1.82)

0.76

0.30

<0.0001

0.78

0.28

<0.0001

Deep

1.79 ± 0.23 (0.28–2.00)

0.63

0.10

<0.0001

0.82

0.08

<0.0001