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Table 4 Relationship between parameters of patellofemoral geometry and WOMAC pain and patella cartilage volume: the difference between obese and non-obese subjects

From: The associations between indices of patellofemoral geometry and knee pain and patella cartilage volume: a cross-sectional study

 

Obese subgroup

 

Non-obese subgroup

  
 

Regression coefficient

(95% CI)*

P value

Regression coefficient

(95% CI)*

P value

P value for difference†

WOMAC pain score

LCPA

-3.13

(-5.60, -0.67)

0.01

0.56

(-0.63, 1.75)

0.36

0.01

SA

0.42

(-1.46, 2.29)

0.66

-0.1

(-0.79, 0.77)

0.98

0.68

I-S ratio

87.80

(-30.86, 206.46)

0.15

-37.58

(-101.45, 26.29)

0.25

0.06

Medial patella cartilage volume

LCPA

86.36

(26.15, 146.58)

0.01

47.81

(-22.37, 117.99)

0.18

0.41

SA

12.01

(-35.76, 59.77)

0.62

-55.61

(-104.79, -6.43)

0.03

0.05

I-S ratio

-3093.84

(-6260.66, 72.98)

0.06

-2943.85

(-6497.61, 603.91)

0.10

0.95

Lateral patella cartilage volume

LCPA

49.36

(-29.20, 127.93)

0.22

48.77

(-52.06, 149.60)

0.34

0.99

SA

53.63

(-6.93, 114.19)

0.08

31.12

(-44.23, 106.48)

0.41

0.64

I-S ratio

-3594.17

(-75463.31, 357.98)

0.07

-2433.12

(-7752.83, 2886.59)

0.37

0.73

  1. LCPA = lateral condyle-patella angle, SA = sulcus angle, I-S Ratio = Insall-Salvati Ratio, CI = Confidence Interval
  2. *adjusted for age, gender, BMI, patella cartilage volume and bone size
  3. †p value calculated using independent samples z-test for difference between subgroups