TABLE 1.

The measurement of the fabella based on classification (Mean ± SD)

	Type I	Type II	Type III	Type IV	Type V	Total
Number	71	44	9	4	8	136
Ratio	52.21%	32.35%	6.62%	2.94%	5.88%	100%
Short axis (cm)	0.45 ± 0.19	0.45 ± 0.18	0.59 ± 0.28 * †	0.52 ± 0.26	0.52 ± 0.26	0.48 ± 0.21
Long axis (cm)	0.80 ± 0.26	0.80 ± 0.35	1.04 ± 0.41 * †	1.21 ± 0.76 * †	0.86 ± 0.50 ‡	0.86 ± 0.38
A(cm)	‐	‐	3.82 ± 1.85	1.34 ± 0.26	1.03 ± 0.56	2.28 ± 1.83
B(cm)	0.54 ± 0.54	0.63 ± 0.54	0.62 ± 0.42	0.59 ± 0.41	0.61 ± 0.68	0.58 ± 0.53

A: The distance between two fabellae. B: The distance between the proximal section of the femoral condyle and the section of the fabella.

^* P < 0.05 vs Type I.

^† P < 0.05 vs Type II.

^‡ P < 0.05 vs Type IV.