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Table 5 The correlation of lower limb length ratio to HKA, NSA, VCA and patellar height

From: Increased lower limb length ratio in patients with patellar instability

Parameter

aT/F ratio

mT/F ratio

Coronal alignment

 HKA

0.454

0.345

 NSA

0.581

0.290

 VCA

0.675

0.378

Evaluation of trochlear

 SA

0.403

0.219

 TA

0.425

0.211

 MTI

0.379

0.222

 LTI

0.329

0.173

Patella tilt

 PTA

0.387

0.213

Patellar height

 IS

0.002 (0.355)

0.001 (0.373)

 BP

< 0.001 (0.480)

< 0.001 (0.562)

 CD

< 0.001 (0.419)

< 0.001 (0.461)

 MIS

0.054 (0.224)

0.009 (0.299)

PTMA

0.062

0.128

  1. Data in table are p value, and data in parentheses are correlation coefficient (r)
  2. HKA hip–knee–ankle angle, NSA femoral neck-shaft angle, VCA femoral valgus cut angle, SA sulcus angle, TA trochlear angle, MTI medial trochlear inclination, LTI lateral trochlear inclination, PTA patella tilt angle, IS Insall–Salvati ratio, BP Blackburne–Peel ratio, CD Caton–Deschamps ratio, MIS modified Insall–Salvati ratio, PTMA patellar tendon moment arm