Radiologically Hyperdense Zones of the Patella Seem to Be Partial Osteonecroses Subsequent to Fracture Treatment

The publisher regrets an error in Table 3 in the above article in the Journal of Knee Surgery, published online January 4, 2013 (doi: 10.1055/s-0032-1332805).

The correct Table 3 appears below.

Table 3 Clinical Follow-up Questionnaires Distinguished by the Type of Fracture (A, B, and C)[a]

Score	Group A (A fractures)	Group B (B fractures)	Group C (C fractures)	p (significance level p ≤ 0,05)
Pain-VAS	1.14 ( ± 2.19)	2.03 ( ± 2.25)	1. 52 ( ± 1.71)	0.53
AKSS	177 ( ± 15.55)	160 ( ± 35.94)	171.9 ( ± 25.91)	0.45
Tegner
Pre-OP	4.57 ( ± 1.99)	4.93 ( ± 1. 84)	5.28 ( ± 1.65)	0.31
Follow-up	4.43 ( ± 2.07)	4.07 ( ± 2.12)	4.52 ( ± 1.81)	0.75
Difference: pre-OP/follow-up	0.14 ( ± 0.38)	0.86 ( ± 1.35)	0.76 ( ± 1.23)	0.32
Lysholm	86.86 ( ± 10.68)	74.75 ( ± 20.19)	82.72 ( ± 17.33)	0.11
WOMAC	18.43 ( ± 23.55)	41.86 ( ± 50.99)	26.96 ( ± 31.02)	0.69
WOMAC complete index	0.73 ( ± 1.15)	1.64 ( ± 1.96)	1.09 ( ± 1.17)	0.51
Patient satisfaction	8.57 ( ± 3.36)	8.32 ( ± 2.19)	8.44 ( ± 1.94)	0.54

^a The visual analog pain scale (Pain-VAS), American Knee Society Score (AKKS), Tegner Activity Score (Tegner), Lysholm score, Western Ontario and McMaster Universities Score (WOMAC), patient satisfaction scores.