Table 1.

Comparison of demographic characteristics and four values for alignment of patellofemoral joint between the responder and non-responder groups

Parameter	Responders (n = 40)	Non-responders (n = 34)	P-value
Age (yr)	55 ± 6.4	53 ± 5.7	0.293
Gender (% female)	67.5 %	72.7 %	0.618
Body mass index (kg/m2)	26.1 ± 4.3	26.5 ± 4.5	0.762
Sulcus angle (°)	131 ± 7.4	128 ± 6.3	0.155
Congruence angle (°)	−5.7 ± 8.5	−2.8 ± 8.9	0.178
Insall-Salvati ratio	0.98 ± 0.14	0.96 ± 0.10	0.514
Q angle (°)	9 ± 3.1	11 ± 4.6	0.061

Data are presented as mean and standard deviation