Limited medial osteochondral lesions of the talus associated with chronic ankle instability do not impact the results of endoscopic modified Broström ligament repair

Table 3 Functional outcomes comparison of the two groups

Variable	Lesion group (n = 60)	Non-lesion group (n = 32)	P^a value	Power^d
Operative time, min	49.45 ± 6.57	45.16 ± 9.91	0.015^b
Hospital duration, day	3.55 ± 0.59	3.56 ± 0.67	0.927 ^b
VAS
1 year	0.00 (0.00–1.00)	0.00 (0.00–2.00)	0.902^c
2 years	0.00 (0.00–1.00)	0.00 (0.00–1.00)	0.861^c
AOFAS
1 year	90.75 ± 4.63	91.50 ± 3.64	0.429^b	0.135
2 years	91.67 ± 4.46	92.13 ± 3.80	0.623^b	0.081
KAFS
1 year	90.13 ± 4.22	89.38 ± 4.52	0.425^b	0.119
2 years	91.12 ± 4.26	90.19 ± 4.12	0.316^b	0.171
ATT, mm
1 year	2.48 ± 1.10	2.53 ± 0.80	0.828^b	0.057
2 years	2.80 ± 1.15	2.69 ± 0.93	0.613^b	0.078
AJPS, degree
1 year
Inversion 10°	7.70 ± 1.36	7.47 ± 1.08	0.407^b	0.141
Inversion 20°	17.70 ± 1.59	18.06 ± 1.56	0.297^b	0.178
Plantar flexion 10°	7.62 ± 1.15	7.78 ± 1.16	0.516^b	0.095
Plantar flexion 20°	18.35 ± 1.29	18.19 ± 1.42	0.580^b	0.082
2 years
Inversion 10°	8.00 ± 1.51	8.13 ± 1.10	0.651^b	0.075
Inversion 20°	17.95 ± 1.64	18.28 ± 1.55	0.350^b	0.156
Plantar flexion 10°	7.83 ± 1.24	8.06 ± 1.34	0.414^b	0.124
Plantar flexion 20°	18.50 ± 1.41	18.59 ± 0.98	0.738^b	0.064

VAS, Visual Analogue Scale; AOFAS, American Orthopaedic Foot and Ankle Society; KAFS, Karlsson Ankle Function Score; ATT, Anterior Talar Translation; AJPS, Active Joint Position Sense
^aA value p < 0.05 was set as statistically significant
^bt test
^cMann–Whitney test
^dPower is computed to reject the null hypothesis of equal means

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