|
Fabellar parameter
|
Length, mm
|
Thickness, mm
|
Width, mm
|
DFI, mm
|
Length/Thickness
|
Width/Thickness
|
Length/Width
|
|---|
|
Gender
|
|
Male (n = 202)
|
7.96 ± 1.80
|
5.00 ± 1.61
|
6.86 ± 2.05
|
34.8 ± 4.5
|
1.68 ± 0.42
|
1.44 ± 0.43
|
1.22 ± 0.31
|
|
Female (n = 200)
|
7.08 ± 2.37
|
4.06 ± 1.31
|
6.08 ± 2.37
|
31.3 ± 3.9
|
1.81 ± 0.51
|
1.54 ± 0.57
|
1.23 ± 0.31
|
|
P value
|
< 0.001
|
< 0.001
|
< 0.001
|
< 0.001
|
0.015
|
0.044
|
0.528
|
|
Side
|
|
Right (n = 224)
|
7.55 ± 2.33
|
4.53 ± 1.59
|
6.41 ± 2.40
|
33.0 ± 4.7
|
1.74 ± 0.47
|
1.46 ± 0.44
|
1.24 ± 0.32
|
|
Left (n = 178)
|
7.49 ± 1.90
|
4.52 ± 1.47
|
6.54 ± 2.05
|
33.0 ± 4.4
|
1.75 ± 0.47
|
1.53 ± 0.58
|
1.20 ± 0.30
|
|
P value
|
0.781
|
0.972
|
0.336
|
0.956
|
0.856
|
0.395
|
0.367
|
|
Articulating groove
|
|
Yes (n = 179)
|
8.68 ± 1.85
|
5.44 ± 1.41
|
7.36 ± 2.12
|
32.8 ± 4.6
|
1.67 ± 0.44
|
1.39 ± 0.37
|
1.24 ± 0.30
|
|
No (n = 223)
|
6.59 ± 1.92
|
3.79 ± 1.21
|
5.75 ± 2.09
|
33.2 ± 4.5
|
1.81 ± 0.48
|
1.58 ± 0.58
|
1.21 ± 0.32
|
|
P value
|
< 0.001
|
< 0.001
|
< 0.001
|
0.349
|
< 0.001
|
< 0.001
|
0.381
|
|
MM tear
|
|
Yes (n = 122)
|
8.22 ± 2.36
|
4.38 ± 1.45
|
7.11 ± 2.37
|
32.6 ± 4.3
|
1.97 ± 0.50
|
1.70 ± 0.60
|
1.21 ± 0.33
|
|
No (n = 280)
|
7.21 ± 1.98
|
4.59 ± 1.58
|
6.19 ± 2.14
|
33.2 ± 4.7
|
1.65 ± 0.42
|
1.40 ± 0.43
|
1.23 ± 0.30
|
|
P value
|
< 0.001
|
0.294
|
0.001
|
0.314
|
< 0.001
|
< 0.001
|
0.408
|
|
Age groupb
|
|
≤ 20 (n = 19)
|
7.79 ± 2.18
|
5.29 ± 1.42
|
6.64 ± 1.59
|
33.5 ± 5.8
|
1.49 ± 0.29
|
1.33 ± 0.40
|
1.20 ± 0.32
|
|
21–30 (n = 54)
|
7.17 ± 1.97
|
5.08 ± 1.76
|
6.42 ± 2.15
|
34.0 ± 4.8
|
1.47 ± 0.33
|
1.32 ± 0.39
|
1.16 ± 0.27
|
|
31–40 (n = 91)
|
6.92 ± 1.77
|
4.61 ± 1.58
|
6.07 ± 2.06
|
33.4 ± 4.3
|
1.56 ± 0.32
|
1.35 ± 0.36
|
1.20 ± 0.29
|
|
41–50 (n = 82)
|
7.02 ± 1.83
|
4.29 ± 1.48
|
6.09 ± 2.32
|
33.6 ± 5.0
|
1.71 ± 0.37
|
1.43 ± 0.44
|
1.23 ± 0.30
|
|
51–60 (n = 57)
|
7.63 ± 2.10
|
4.33 ± 1.43
|
6.65 ± 2.28
|
32.6 ± 4.4
|
1.86 ± 0.52
|
1.61 ± 0.55
|
1.21 ± 0.32
|
|
≥ 61 (n = 99)
|
8.55 ± 2.45
|
4.30 ± 1.40
|
7.03 ± 2.47
|
31.8 ± 4.0
|
2.07 ± 0.52
|
1.71 ± 0.65
|
1.28 ± 0.35
|
|
P value
|
< 0.001
|
0.011
|
0.078
|
0.115
|
< 0.001
|
< 0.001
|
0.417
|
|
Overall (n = 402)
|
7.52 ± 2.15
|
4.53 ± 1.54
|
6,47 ± 2.25
|
33.0 ± 4.6
|
1.75 ± 0.47
|
1.49 ± 0.51
|
1.22 ± 0.31
|
- aValues are presented as mean ± standard deviation mm. P values refer to independent samples t test, Mann–Whitney U test or Kruskal–Wallis H test for pooled values. DFI distance between the fabella and the insertion of the lateral head of the gastrocnemius onto the femur, MM medial meniscus. br = 0.463, P < 0.001 for length/thickness ratio, r = 0.303, P < 0.001 for width/thickness ratio; Spearman nonparametric correlation test
