Femoro Patella Vialla patellofemoral arthroplasty: An independent assessment of outcomes at minimum 2-year follow-up

Table 2 Effect of different patient characteristics on outcome

Patient factor	Category	n	Median OKS (Q1, Q3)	P value	Mean Melbourne Score (SD)	P value
Sex	Male	12	42 (38, 46)	0.28	21.3 (4.7)	0.31
	Female	29	40 (37, 42)		19.1 (6.4)
Trochlear dysplasia	Non-dysplastic	10	41 (36, 43)	0.95	20.0 (5.7)	0.67
	Dysplastic	31	41 (38, 43)		19.0 (7.1)
Patella alta	Yes	21	41 (37, 42)	0.56	19.3 (6.4)	0.65
	No	20	40 (36, 44)		20.2 (5.6)
Uni- or bi-lateral	Unilateral	19	41 (37, 42)	0.83	19.8 (5.6)	0.97
	Bilateral	22	41 (37, 43)		19.7 (6.4)
Previous surgery	Yes	10	40 (37, 42)	0.70	22.0 (5.0)	0.28
	No	31	41 (37, 43)		19.0 (6.1)

OKS: Oxford Knee Score.