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Table 2 Tertiles for patellar alignment measures

From: Is the effectiveness of patellofemoral bracing modified by patellofemoral alignment and trochlear morphology?

 

Tertile 1

Tertile 2

Tertile 3

Patellar Length Ratio (PLR)

≤1.53

1.54 – 1.72

≥1.73

Bisect Offset (BO)

≤62.93

62.93 – 69.51

≥69.52

Patellar Tilt Angle (PTA) (degrees)

≤3.5

3.6 – 8.3

≥8.4

Trochlear Inclination (Lateral TI) (degrees)

≤20.1

20.2 – 24.3

≥24.4

Trochlear Inclination (Medial TI) (degrees)

≤17.2

17.3 – 23.9

≥24

Trochlear Angle (TA) (degrees)

≤ −4.8

−4.7 – 0.7

≥0.7

Sulcus Angle (SA) (degrees)

≤134.2

134.3 - 141

≥141.1

Lateral Patellofemoral Angle (LFPA) (degrees)

≤9

9.1 – 14.4

≥14.5

Congruence Angle (CA) (degrees)

≤8.6

8.7 – 47.6

≥47.7

Patellar Lateral Subluxation Distance (PSD) (mm)

≤1.4

1.4 – 5

≥5.1

Lateral Patellar Displacement (LPD) (mm)

≤1.2

1.3 – 5

≥5.1