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. 2018 Jun 12;13(6):e0198797. doi: 10.1371/journal.pone.0198797

Table 2. Characteristics of participants (n = 279).

Characteristics Partial or complete ACL tears (n = 43) Other knee disorders (n = 236)
n (%) mean (SD) n (%) Mean (SD)
Age 38.6 (12.9)* 51.0 (15.6)
Body Mass Index (Kg/m2) 26.9 (5.8)* 29.7 (6.6)
Sex
    Female 21 (48.8) 140 (59.3)
    Male 22 (51.2) 96 (40.7)
Recruitment site
    Orthopaedic clinics 41 (95.3)* 188 (79.7)
    Family medicine unit/university community 2 (4.7) 48 (20.3)
History of trauma 34 (79.1)* 53 (22.5)
Duration of pain and symptoms at time of consultation
    <3 months 10 (23.3)* 24 (10.2)
    3–12 months 15 (34.8)* 57 (24.2)
    ≥ 12 months 18 (41.9)* 155 (65.6)
Referred to surgery after consultation 23 (53.5)* 25 (10.6)
Knee Injury and Osteoarthritis Outcome Score (KOOS)
    Pain 67.6 (16.7)* 56.9 (20.3)
    Symptoms 73.8 (14.5) 69.4 (19.8)
    Activity of Daily Living 73.7 (18.3)* 64.4 (22.4)
    Sports 28.3 (25.3) 28.7 (25.3)
    Quality of Life 28.5 (15.6)* 40.4 (20.0)
K6 psychological distress scale (/30) 26.9 (3.5) 26.3 (4.7)

ACL: anterior cruciate ligament; SD: standard deviation; KOOS: a score of 0 indicates a severe condition and 100 indicates a normal knee; K6: a score of 6 indicates serious mental illness and 30 indicates no mental illness

* indicates a significant difference (p<0.05) between participants with an anterior cruciate ligament tear and those without.