Decision-making factors and their thresholds for total knee arthroplasty in lateral tibiofemoral osteoarthritis patients: a retrospective cohort study

Table 2 Comparison of radiologic parameters between deliberation phase and decision-making phase

	Deliberation stage (n = 32)	Decision-making stage (n = 24)	p-Value
Pelvis
LLD (mm)^*	−1.13 ± 6.67	−2.26 ± 8.64	n.s.^†
Pelvic obliquity (°)^*	−0.30 ± 1.97	−0.66 ± 2.57	n.s.^†
Knee joint
Ahlbäck grade^‡
Mild	7 (22%)	3 (12%)	0.003^§,^∥
Moderate	18 (56%)	5 (21%)
Severe	7 (22%)	16 (67%)
HKA (°)^*	− 1.53 ± 5.47	− 8.46 ± 7.74	< 0.001^¶,^∥
JLCA (°)^*	− 0.44 ± 2.80	− 2.70 ± 4.19	0.028^¶,^∥
TF subluxation at the lateral cortex (%)^*
Knee AP	− 2.46 ± 2.7	− 3.53 ± 4.66	n.s.^†
Rosenberg view	− 0.86 ± 3.38	− 3.82 ± 5.86	0.033^¶,^∥
TF subluxation at the center (%)^*
Knee AP	− 5.63 ± 5.63	− 0.61 ± 7.46	0.006^†,^∥
Rosenberg view	− 1.02 ± 4.64	−1.51 ± 9.12	n.s.^†
Hip joint
K–L grade of hip^‡
Mild	27 (84%)	23 (96%)	n.s.^§
Severe	5 (16%)	1 (4%)	n.s.^§
HHL (mm)^*	181.10 ± 7.82	185.85 ± 11.55	n.s.^¶
FO (°)^*	42.60 ± 5.39	41.09 ± 5.14	n.s.^†
NSA (°)^*	54.36 ± 5.10	53.49 ± 5.70	n.s.^†
Ankle joint
K–L grade of ankle^‡
Mild	31 (97%)	23 (96%)	n.s.^**
Severe	1 (3%)	1 (4%)	n.s.^**
TAA (°)^*	− 0.37 ± 1.49	− 0.05 ± 1.56	n.s.^†,^∥
TTA (°)^*	0.58 ± 3.81	3.71 ± 5.47	0.021^¶,^∥

*The values are given as the mean and standard deviation
^†Independent t-test
^‡The values are given as the number of patients
^§Pearson’s chi-square test
^∥Statistically significant
^¶Mann–Whitney U test
^**Fisher’s exact test
LLD leg length discrepancy, HKA hip–knee–ankle angle, JLCA joint line convergence angle, AP anteroposterior, K–L Kellgren–Lawrence, HHL head–head length of pelvis, FO femoral offset, NSA neck shaft angle of hip, TAA tilt angle of ankle, TTA tibiotalar angle

ISSN: 2234-2451