Muti-factor analysis of sport activity level after high tibial osteotomy

Table 2 Baseline of radiological variables among the sport level-reduced, unchanged and improved groups

Characteristics	Total (n = 158)	Sport level-reduced group (n = 28, 17.7%)	Sport level-unchanged group (n = 97, 61.4%)	Sport level-improved group (n = 33, 20.9%)	P value
K–L grade pre, n (%)					0.947
I	6(3.8%)	1(3.6%)	4(4.1%)	1(3.0%)
II	123(77.8%)	21(75%)	76(78.4%)	26 (78.8%)
III	28(17.7%)	6(21.4%)	17(17.5%)	5(15.2%)
IV	1(0.6%)	0(0%)	0(0%)	1(3.0%)
K–L grade post, n (%)					0.741
0	1(0.6%)	0(0%)	1(1.0%)	0(0%)	0
I	4(2.5%)	1(3.6%)	2(2.1%)	1(3.0%)	I
II	124(78.5%)	22(78.6%)	76(78.4%)	26(78.8%)	II
III	28(17.7%)	5(17.9%)	18(18.6%)	5(15.2%)	III
IV	1(0.6%)	0(0%)	0(0%)	1(3.0%)	IV
HKA pre	82.49 ± 4.1	81.96 ± 3.5	82.43 ± 4.4	83.09 ± 3.3	0.548
HKA Post	89.96 ± 2.9	89.71 ± 3.3	90.06 ± 2.8	89.85 ± 3.3	0.829
%MA pre	18.78 ± 15.6	14.29 ± 15.3	18.69 ± 15.9	22.88 ± 14.3	0.1
%MA post	53.35 ± 11.3	48.39 ± 12.9	54.33 ± 10.1	54.70 ± 12.3	0.036
LDFA pre	88.87 ± 2.0	89.36 ± 2.0	88.78 ± 2.0	88.70 ± 1.6	0.337
LDFA post	89.17 ± 1.8	89.36 ± 2.1	89.10 ± 1.8	89.21 ± 1.5	0.799
MPTA pre	83.44 ± 3.1	83.32 ± 2.7	83.30 ± 3.5	83.97 ± 2.2	0.552
MPTA Post	90.18 ± 2.9	90.04 ± 2.9	90.03 ± 3.01	90.73 ± 2.25	0.463
JLCA pre	2.85 ± 1.6	3.11 ± 1.8	2.84 ± 1.6	2.70 ± 1.4	0.592
JLCA Post	2.37 ± 1.6	2.43 ± 1.8	2.36 ± 1.6	2.36 ± 1.5	0.981
PPTA pre	81.04 ± 3.8	82.18 ± 3.6	80.62 ± 3.9	81.30 ± 3.7	0.148
PPTA post	78.85 ± 7.1	76.32 ± 14.0	79.16 ± 4.3	80.06 ± 4.18	0.094
BPI pre	1.03 ± 0.2	1.03 ± 0.3	1.01 ± 0.18	1.11 ± 1.0	0.078
BPI post	0.86 ± 0.19	0.89 ± 0.2	0.84 ± 0.19	0.90 ± 0.18	0.165

Continuous variables were described as mean ± standard and categorical variables as frequencies with percentage (%)
HKA hip–knee–ankle angle, %MA Percentage of mechanical axis, MPTA Percentage of mechanical axis, JLCA Joint line convergence angle, PPTA Posterior proximal tibial angle, K–L grade Kallgren–Lawrence osteoarthritis grade, BPI Blackburn–Peel index

ISSN: 1749-799X