The influence of varus and valgus deviation on the contact area of patellofemoral joint in healthy knees

Table 3 Comparison of mean joint congruence between the groups of varus and valgus

Contact area Angle of Knee flexion(°)	Group	LFCA(mm²)	t	P	MFCA(mm²)	t	P	TFCA(mm²)	t	P
20	Group I	143.0 ± 19.0	0.279	0.781	25.0 ± 13.5	-3.375	0.001	168.0 ± 20.5	-1.839	0.072
20	Group II	141.6 ± 17.8	0.279	0.781	36.4 ± 10.9	-3.375	0.001	178.0 ± 18.9	-1.839	0.072
40	Group I	216.7 ± 20.7	2.190	0.033	64.0 ± 17.0	-2.904	0.005	280.8 ± 29.4	-0.092	0.927
40	Group II	204.5 ± 19.6	2.190	0.033	77.0 ± 15.1	-2.904	0.005	281.4 ± 23.3	-0.092	0.927
60	Group I	230.2 ± 21.8	1.267	0.211	104.1 ± 16.2	-0.521	0.605	334.4 ± 30.5	0.683	0.498
60	Group II	222.3 ± 23.0	1.267	0.211	106.5 ± 16.9	-0.521	0.605	328.9 ± 27.2	0.683	0.498

LFCA: lateral facet contact area MFCA: medial facet contact area TFCA: total facet contact area
Group I :the group of valgus alignment Group II : the group of varus alignment

ISSN: 1471-2474