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Table 1 Patient characteristics at T0

From: Pedi-IKDC or KOOS-child: which questionnaire should be used in children with knee disorders?

Characteristic Value
Male sex, n (%) 34 (33.7)
Mean age, years (SD) 15.0 (1.85)
Mean BMI, kg/m2 (SD) 20.70 (3.37)
Injury left side, n (%) 52 (51.5)
First visit, n (%) 51 (49.5)
First injury, n (%) 78 (77.2)
Injury duration, n (%)a  
 0–1 months 15 (14.9)
 1–3 months 21 (20.8)
 4–6 months 22 (21.8)
 >  6 months 43 (42.6)
Diagnosis, n (%)  
Anterior cruciate ligament rupture 24 (23.8)
 • Solitary 14 (13.9)
 • combined with anterolateral injury 3 (3)
 • combined with medial collateral ligament injury 2 (2)
 • combined with medial meniscus tear 5 (5)
Meniscal tear 7 (6.9)
Collateral ligament injury 2 (2)
Patellofemoral pain syndrome 22 (21.8)
Contusion/distorsion 11 (10.9)
Osgood-Schlatter 4 (4)
Chondropathy 10 (9.9)
Other 21 (20.8)
 • Baker’s cyst 1 (1)
 • Bone bruise 1 (1)
 • Lyme arthritis 1 (1)
 • Bone bruise 1 (1)
 • Patellar tendinopathy 3 (3)
 • Laxity anterior cruciate ligament 1 (1)
 • Osteochondritis dissecans 5 (5)
 • Patella luxation 1 (1)
 • Plica syndrome 2 (2)
 • Reumatoid arthritis 1 (1)
 • Sinding Larson 1 (1)
 • Unknown origin 3 (3)
  1. a percentages should not be summed up as number are rounded to one decimal place n, number of patients; SD Standard Deviation; cm, centimeter, kg kilogram, m meter, BMI Body Mass Index